Information for Area Code: 312-xxx-xxxx - IL - ILLINOIS

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Information about Area Code 312

Area code 312 encompasses the Chicago Loop and surrounding areas in Chicago, Illinois. It is roughly bounded by Armitage Avenue on the north, Western Avenue on the west, and 35th Street on the south.

Contents

History

312 was one of the original 86 area codes created in 1947, then called "Numbering Plan Areas." With the rotary dialing technology available at the time, care was given to keep the number of "clicks" to a minimum for large cities, hence Chicago being assigned a code with only six clicks. Manhattan was assigned 212, with downtown Los Angeles assigned 213.

The first production #4ESS toll switch was installed in January 1976. Telephone World

Exchange split

Until 1989, 312 included most of the Chicago metropolitan area; at that time the suburbs became area code 708. In 1996, most of the city split off into 773 after the northern suburbs and western suburbs split into area codes 847 and 630 respectively, while the south suburbs kept 708

In popular culture

  • Goose Island Brewery brews a beer named 312 Urban Wheat Ale.
  • A restaurant at the Kimpton Hotels-operated Hotel Allegro, at LaSalle and Randolph streets in the Loop, is named 312.
  • Rapper Snoop Dogg has used the 312 as a primary theme in his "Thats That" single.

See also

State of Illinois area codes: 217, 224, 309, 312, 618, 630, 708, 773, 815, 847
North: 773
West: 773 area code 312 East: Lake Michigan
South: 773



Flag of Illinois Illinois Area codes
217 | 224 | 309 | 312 | 618 | 630 | 708 | 773 | 779 | 815 | 847



Exchanges for Area Code 312-xxx-xxxx:

Exchange 312-200
-

Exchange 312-201
CHICAGO - AMERITECH ILLINOIS

Exchange 312-202
CHICAGO - AMERITECH ILLINOIS

Exchange 312-203
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-204
CHICAGO - AMERITECH ILLINOIS

Exchange 312-205
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-206
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-207
CHICAGO - AMERITECH ILLINOIS

Exchange 312-208
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-209
Northbrook - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-210
Chicago - AMERITECH ILLINOIS

Exchange 312-211
-

Exchange 312-212
CHICAGO - AMERITECH ILLINOIS

Exchange 312-213
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-214
CHICAGO - AMERITECH ILLINOIS

Exchange 312-215
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-216
- SOURCE ONE WIRELESS

Exchange 312-217
Lombard - UNITED STATES CELLULAR CORP.

Exchange 312-218
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-220
CHICAGO - AMERITECH ILLINOIS

Exchange 312-221
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-222
CHICAGO - AMERITECH ILLINOIS

Exchange 312-223
CHICAGO - AMERITECH ILLINOIS

Exchange 312-224
Arlington Heights - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-225
CHICAGO - AMERITECH ILLINOIS

Exchange 312-226
CHICAGO - AMERITECH ILLINOIS

Exchange 312-228
CHICAGO - AMERITECH ILLINOIS

Exchange 312-229
Wheeling - AMERITECH ILLINOIS

Exchange 312-230
CHICAGO - AMERITECH ILLINOIS

Exchange 312-231
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-232
- AIRTOUCH PAGING - ILLINOIS

Exchange 312-233
CHICAGO - AMERITECH ILLINOIS

Exchange 312-234
CHICAGO - AMERITECH ILLINOIS

Exchange 312-235
CHICAGO - AMERITECH ILLINOIS

Exchange 312-236
CHICAGO - AMERITECH ILLINOIS

Exchange 312-237
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-238
Arlington Heights - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-239
Chicago - AT&T LOCAL

Exchange 312-240
CHICAGO - AMERITECH ILLINOIS

Exchange 312-241
Chicago - HEARTLAND COMMUNICATIONS, INC.

Exchange 312-242
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-243
CHICAGO - AMERITECH ILLINOIS

Exchange 312-244
- AMERITECH ILLINOIS

Exchange 312-245
CHICAGO - AMERITECH ILLINOIS

Exchange 312-246
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-247
Chicago - GLOBALCOM, INC.-IL

Exchange 312-249
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-250
Westchester - METROCALL

Exchange 312-251
CHICAGO - AMERITECH ILLINOIS

Exchange 312-252
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-253
- ALLEGIANCE TELECOM, INC. - IL

Exchange 312-254
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-255
CHICAGO - AMERITECH ILLINOIS

Exchange 312-256
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-258
CHICAGO - AMERITECH ILLINOIS

Exchange 312-259
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-260
Bensenville - MCIMETRO, ATS, INC.

Exchange 312-261
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-262
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-263
CHICAGO - AMERITECH ILLINOIS

Exchange 312-264
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-265
-

Exchange 312-266
CHICAGO - AMERITECH ILLINOIS

Exchange 312-267
CHICAGO - AMERITECH ILLINOIS

Exchange 312-268
Arlington Heights - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-269
CHICAGO - AMERITECH ILLINOIS

Exchange 312-271
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-272
Westchester - METROCALL

Exchange 312-274
CHICAGO - AMERITECH ILLINOIS

Exchange 312-275
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-276
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-277
Chicago - ALLEGIANCE TELECOM, INC. - IL

Exchange 312-278
Arlington Heights - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-279
Chicago - MCIMETRO, ATS, INC.

Exchange 312-280
CHICAGO - AMERITECH ILLINOIS

Exchange 312-281
Chicago - GLOBAL CROSSING LOCAL SERVICES, INC.-IL

Exchange 312-282
- AT&T WIRELESS SERVICES, INC.

Exchange 312-283
Chicago - GLOBAL CROSSING LOCAL SERVICES, INC.-IL

Exchange 312-284
Chicago - XO ILLINOIS, INC.

Exchange 312-285
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-286
- AT&T WIRELESS SERVICES, INC.

Exchange 312-287
Buffalo Grove - NEXTEL COMMUNICATIONS

Exchange 312-288
Chicago - INTERMEDIA COMMUNICATIONS INC. - IL

Exchange 312-289
Westchester - METROCALL

Exchange 312-290
Westchester - METROCALL

Exchange 312-291
CHICAGO - AMERITECH ILLINOIS

Exchange 312-293
CHICAGO - AMERITECH ILLINOIS

Exchange 312-294
CHICAGO - AMERITECH ILLINOIS

Exchange 312-295
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-296
Buffalo Grove - NEXTEL COMMUNICATIONS

Exchange 312-297
CHICAGO - AMERITECH ILLINOIS

Exchange 312-298
La Grange - SPRINT COMMUNICATIONS COMPANY, L.P. - IL

Exchange 312-299
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-300
Chicago - AMERITECH ILLINOIS

Exchange 312-301
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-302
CHICAGO - AMERITECH ILLINOIS

Exchange 312-303
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-304
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-305
Northbrook - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-306
CHICAGO - AMERITECH ILLINOIS

Exchange 312-307
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-308
CHICAGO - AMERITECH ILLINOIS

Exchange 312-309
CHICAGO - AMERITECH ILLINOIS

Exchange 312-310
Northbrook - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-311
-

Exchange 312-313
- SOURCE ONE WIRELESS

Exchange 312-314
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-315
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-316
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-317
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-318
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-320
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-321
CHICAGO - AMERITECH ILLINOIS

Exchange 312-322
CHICAGO - AMERITECH ILLINOIS

Exchange 312-323
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-324
Chicago - LEVEL 3 COMMUNICATIONS, LLC - IL

Exchange 312-325
CHICAGO - AMERITECH ILLINOIS

Exchange 312-326
CHICAGO - AMERITECH ILLINOIS

Exchange 312-327
Chicago - XO ILLINOIS, INC.

Exchange 312-328
CHICAGO - AMERITECH ILLINOIS

Exchange 312-329
CHICAGO - AMERITECH ILLINOIS

Exchange 312-330
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-331
Buffalo Grove - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-332
CHICAGO - AMERITECH ILLINOIS

Exchange 312-333
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-334
Chicago - GLOBALCOM, INC.-IL

Exchange 312-335
CHICAGO - AMERITECH ILLINOIS

Exchange 312-336
CHICAGO - AMERITECH ILLINOIS

Exchange 312-337
CHICAGO - AMERITECH ILLINOIS

Exchange 312-338
CHICAGO - AMERITECH ILLINOIS

Exchange 312-339
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-341
CHICAGO - AMERITECH ILLINOIS

Exchange 312-342
- AT&T WIRELESS SERVICES, INC.

Exchange 312-343
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-344
CHICAGO - AMERITECH ILLINOIS

Exchange 312-345
CHICAGO - AMERITECH ILLINOIS

Exchange 312-346
CHICAGO - AMERITECH ILLINOIS

Exchange 312-347
CHICAGO - AMERITECH ILLINOIS

Exchange 312-348
Chicago - NEUTRAL TANDEM-ILLINOIS, LLC - IL

Exchange 312-349
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-350
Northbrook - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-351
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-352
BURR RIDGE - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-353
CHICAGO - AMERITECH ILLINOIS

Exchange 312-354
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-355
CHICAGO - AMERITECH ILLINOIS

Exchange 312-356
CHICAGO - AMERITECH ILLINOIS

Exchange 312-357
CHICAGO - AMERITECH ILLINOIS

Exchange 312-358
- SOURCE ONE WIRELESS

Exchange 312-359
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-360
CHICAGO - AMERITECH ILLINOIS

Exchange 312-361
CHICAGO - AMERITECH ILLINOIS

Exchange 312-362
CHICAGO - AMERITECH ILLINOIS

Exchange 312-363
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-364
CHICAGO - AMERITECH ILLINOIS

Exchange 312-365
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-366
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-367
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-368
CHICAGO - AMERITECH ILLINOIS

Exchange 312-369
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-370
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-371
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-372
CHICAGO - AMERITECH ILLINOIS

Exchange 312-373
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-374
CHICAGO - AMERITECH ILLINOIS

Exchange 312-375
Chicago - T-MOBILE USA, INC.

Exchange 312-376
Chicago - CBEYOND COMMUNICATIONS, LLC-IL

Exchange 312-377
Wood Dale - XO ILLINOIS, INC.

Exchange 312-378
Westchester - METROCALL

Exchange 312-379
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-380
CHICAGO - AMERITECH ILLINOIS

Exchange 312-381
CHICAGO - AMERITECH ILLINOIS

Exchange 312-382
CHICAGO - AMERITECH ILLINOIS

Exchange 312-383
Westchester - METROCALL

Exchange 312-384
CHICAGO - AMERITECH ILLINOIS

Exchange 312-385
CHICAGO - AMERITECH ILLINOIS

Exchange 312-386
CHICAGO - AMERITECH ILLINOIS

Exchange 312-387
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-388
Lombard - UNITED STATES CELLULAR CORP.

Exchange 312-389
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-390
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-391
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-392
-

Exchange 312-393
- AIRTOUCH PAGING - ILLINOIS

Exchange 312-394
CHICAGO - AMERITECH ILLINOIS

Exchange 312-395
Chicago - AT&T LOCAL

Exchange 312-396
CHICAGO - AMERITECH ILLINOIS

Exchange 312-397
CHICAGO - AMERITECH ILLINOIS

Exchange 312-398
Westchester - METROCALL

Exchange 312-399
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-400
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-401
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-402
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-403
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-404
Chicago - T-MOBILE USA, INC.

Exchange 312-405
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-406
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-407
CHICAGO - AMERITECH ILLINOIS

Exchange 312-408
CHICAGO - AMERITECH ILLINOIS

Exchange 312-409
CHICAGO - AMERITECH ILLINOIS

Exchange 312-410
CHICAGO - AMERITECH ILLINOIS

Exchange 312-411
-

Exchange 312-412
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-413
CHICAGO - AMERITECH ILLINOIS

Exchange 312-415
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-416
Elk Grove Village - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-417
CHICAGO - AMERITECH ILLINOIS

Exchange 312-418
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-419
CHICAGO - AMERITECH ILLINOIS

Exchange 312-420
- AT&T WIRELESS SERVICES, INC.

Exchange 312-421
CHICAGO - AMERITECH ILLINOIS

Exchange 312-422
CHICAGO - AMERITECH ILLINOIS

Exchange 312-423
Arlington Heights - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-424
CHICAGO - AMERITECH ILLINOIS

Exchange 312-425
CHICAGO - AMERITECH ILLINOIS

Exchange 312-426
Westchester - METROCALL

Exchange 312-427
CHICAGO - AMERITECH ILLINOIS

Exchange 312-428
Chicago - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-429
Chicago - GLOBAL CROSSING LOCAL SERVICES, INC.-IL

Exchange 312-430
CHICAGO - AMERITECH ILLINOIS

Exchange 312-431
CHICAGO - AMERITECH ILLINOIS

Exchange 312-432
CHICAGO - AMERITECH ILLINOIS

Exchange 312-433
CHICAGO - AMERITECH ILLINOIS

Exchange 312-435
CHICAGO - AMERITECH ILLINOIS

Exchange 312-436
CHICAGO - AMERITECH ILLINOIS

Exchange 312-437
Lombard - UNITED STATES CELLULAR CORP.

Exchange 312-438
- SOURCE ONE WIRELESS

Exchange 312-440
CHICAGO - AMERITECH ILLINOIS

Exchange 312-441
CHICAGO - AMERITECH ILLINOIS

Exchange 312-442
CHICAGO - AMERITECH ILLINOIS

Exchange 312-443
CHICAGO - AMERITECH ILLINOIS

Exchange 312-444
CHICAGO - AMERITECH ILLINOIS

Exchange 312-445
CHICAGO - CORECOMM ILLINOIS, INC. - IL

Exchange 312-446
Buffalo Grove - NEXTEL COMMUNICATIONS

Exchange 312-447
CHICAGO - AMERITECH ILLINOIS

Exchange 312-449
- AIRTOUCH PAGING - ILLINOIS

Exchange 312-450
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-451
Chicago - T-MOBILE USA, INC.

Exchange 312-452
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-453
Elk Grove Village - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-454
CHICAGO - AMERITECH ILLINOIS

Exchange 312-455
CHICAGO - AMERITECH ILLINOIS

Exchange 312-456
CHICAGO - AMERITECH ILLINOIS

Exchange 312-457
- AIRTOUCH PAGING - ILLINOIS

Exchange 312-458
CHICAGO - AMERITECH ILLINOIS

Exchange 312-460
CHICAGO - AMERITECH ILLINOIS

Exchange 312-461
CHICAGO - AMERITECH ILLINOIS

Exchange 312-462
CHICAGO - AMERITECH ILLINOIS

Exchange 312-463
CHICAGO - AMERITECH ILLINOIS

Exchange 312-464
CHICAGO - AMERITECH ILLINOIS

Exchange 312-466
CHICAGO - AMERITECH ILLINOIS

Exchange 312-467
CHICAGO - AMERITECH ILLINOIS

Exchange 312-469
- AMERITECH ILLINOIS

Exchange 312-470
Bensenville - MCIMETRO, ATS, INC.

Exchange 312-472
CHICAGO -

Exchange 312-473
-

Exchange 312-474
CHICAGO - AMERITECH ILLINOIS

Exchange 312-475
CHICAGO - AMERITECH ILLINOIS

Exchange 312-476
CHICAGO - 2ND CENTURY COMMUNICATIONS, INC. - IL

Exchange 312-479
Chicago - AT&T LOCAL

Exchange 312-480
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-482
CHICAGO - AMERITECH ILLINOIS

Exchange 312-484
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-485
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-486
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-488
-

Exchange 312-489
- CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-490
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-491
CHICAGO - AMERITECH ILLINOIS

Exchange 312-492
CHICAGO - AMERITECH ILLINOIS

Exchange 312-493
Chicago - T-MOBILE USA, INC.

Exchange 312-494
CHICAGO - AMERITECH ILLINOIS

Exchange 312-495
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-496
CHICAGO - AMERITECH ILLINOIS

Exchange 312-497
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-498
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-499
CHICAGO - AMERITECH ILLINOIS

Exchange 312-500
-

Exchange 312-501
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-502
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-503
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-504
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-505
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-506
Chicago - CIMCO COMMUNICATIONS, INC. - IL

Exchange 312-507
CHICAGO - AMERITECH ILLINOIS

Exchange 312-510
BURR RIDGE - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-511
-

Exchange 312-512
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-513
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-514
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-515
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-516
CHICAGO - AMERITECH ILLINOIS

Exchange 312-518
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-519
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-520
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-521
Chicago - AT&T LOCAL

Exchange 312-523
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-524
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-525
Chicago - MCIMETRO, ATS, INC.

Exchange 312-526
CHICAGO - AMERITECH ILLINOIS

Exchange 312-527
CHICAGO - AMERITECH ILLINOIS

Exchange 312-528
CHICAGO - AMERITECH ILLINOIS

Exchange 312-529
Chicago - AT&T LOCAL

Exchange 312-530
Westchester - METROCALL

Exchange 312-531
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-532
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-533
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-537
CHICAGO - AMERITECH ILLINOIS

Exchange 312-540
CHICAGO - AMERITECH ILLINOIS

Exchange 312-541
CHICAGO - AMERITECH ILLINOIS

Exchange 312-542
CHICAGO - AMERITECH ILLINOIS

Exchange 312-543
- AT&T WIRELESS SERVICES, INC.

Exchange 312-544
CHICAGO - AMERITECH ILLINOIS

Exchange 312-545
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-546
Chicago - LEVEL 3 COMMUNICATIONS, LLC - IL

Exchange 312-547
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-550
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-551
CHICAGO - AMERITECH ILLINOIS

Exchange 312-552
CHICAGO - AMERITECH ILLINOIS

Exchange 312-553
CHICAGO - AMERITECH ILLINOIS

Exchange 312-554
CHICAGO - AMERITECH ILLINOIS

Exchange 312-555
Chicago - AMERITECH ILLINOIS

Exchange 312-556
CHICAGO - AMERITECH ILLINOIS

Exchange 312-557
CHICAGO - AMERITECH ILLINOIS

Exchange 312-558
CHICAGO - AMERITECH ILLINOIS

Exchange 312-559
CHICAGO - AMERITECH ILLINOIS

Exchange 312-560
- AT&T WIRELESS SERVICES, INC.

Exchange 312-562
Westchester - METROCALL

Exchange 312-563
CHICAGO - AMERITECH ILLINOIS

Exchange 312-564
-

Exchange 312-565
CHICAGO - AMERITECH ILLINOIS

Exchange 312-566
CHICAGO - AMERITECH ILLINOIS

Exchange 312-567
CHICAGO - AMERITECH ILLINOIS

Exchange 312-568
CHICAGO - AMERITECH ILLINOIS

Exchange 312-569
CHICAGO - AMERITECH ILLINOIS

Exchange 312-570
CHICAGO - AMERITECH ILLINOIS

Exchange 312-571
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-572
CHICAGO - AMERITECH ILLINOIS

Exchange 312-573
CHICAGO - AMERITECH ILLINOIS

Exchange 312-574
CHICAGO - AMERITECH ILLINOIS

Exchange 312-575
CHICAGO - AMERITECH ILLINOIS

Exchange 312-576
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-577
Elk Grove Village - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-578
CHICAGO - AMERITECH ILLINOIS

Exchange 312-580
CHICAGO - AMERITECH ILLINOIS

Exchange 312-582
CHICAGO - AMERITECH ILLINOIS

Exchange 312-583
CHICAGO - AMERITECH ILLINOIS

Exchange 312-584
-

Exchange 312-587
CHICAGO - AMERITECH ILLINOIS

Exchange 312-588
CHICAGO - AMERITECH ILLINOIS

Exchange 312-589
CHICAGO - AMERITECH ILLINOIS

Exchange 312-590
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-591
Chicago - AMERITECH ILLINOIS

Exchange 312-592
CHICAGO - AMERITECH ILLINOIS

Exchange 312-593
Chicago - T-MOBILE USA, INC.

Exchange 312-595
CHICAGO - AMERITECH ILLINOIS

Exchange 312-596
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-597
- SOURCE ONE WIRELESS

Exchange 312-599
Westchester - METROCALL

Exchange 312-601
Chicago - MCIMETRO, ATS, INC.

Exchange 312-602
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-603
CHICAGO - AMERITECH ILLINOIS

Exchange 312-604
Wood Dale - XO ILLINOIS, INC.

Exchange 312-606
CHICAGO - AMERITECH ILLINOIS

Exchange 312-607
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-608
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-609
CHICAGO - AMERITECH ILLINOIS

Exchange 312-610
Chicago - HEARTLAND COMMUNICATIONS, INC.

Exchange 312-611
-

Exchange 312-612
CHICAGO - AMERITECH ILLINOIS

Exchange 312-613
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-614
Westchester - METROCALL

Exchange 312-615
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-616
CHICAGO - AMERITECH ILLINOIS

Exchange 312-617
Buffalo Grove - NEXTEL COMMUNICATIONS

Exchange 312-618
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-619
Chicago - CELLULAR PAGING USA, INC.

Exchange 312-621
CHICAGO - AMERITECH ILLINOIS

Exchange 312-622
- AT&T WIRELESS SERVICES, INC.

Exchange 312-623
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-624
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-625
Oak Brook - GLOBAL NAPS, INC. - IL

Exchange 312-627
CHICAGO - AMERITECH ILLINOIS

Exchange 312-628
Chicago - XO ILLINOIS, INC.

Exchange 312-629
CHICAGO - AMERITECH ILLINOIS

Exchange 312-630
CHICAGO - AMERITECH ILLINOIS

Exchange 312-632
CHICAGO - AMERITECH ILLINOIS

Exchange 312-633
CHICAGO - AMERITECH ILLINOIS

Exchange 312-634
CHICAGO - AMERITECH ILLINOIS

Exchange 312-635
Northbrook - GLOBAL CROSSING LOCAL SERVICES, INC.-IL

Exchange 312-636
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-637
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-638
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-639
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-640
CHICAGO - AMERITECH ILLINOIS

Exchange 312-641
CHICAGO - AMERITECH ILLINOIS

Exchange 312-642
CHICAGO - AMERITECH ILLINOIS

Exchange 312-643
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-644
CHICAGO - AMERITECH ILLINOIS

Exchange 312-645
CHICAGO - AMERITECH ILLINOIS

Exchange 312-646
-

Exchange 312-647
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-648
CHICAGO - AMERITECH ILLINOIS

Exchange 312-649
CHICAGO - AMERITECH ILLINOIS

Exchange 312-650
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-651
CHICAGO - AMERITECH ILLINOIS

Exchange 312-652
CHICAGO - AMERITECH ILLINOIS

Exchange 312-653
CHICAGO - AMERITECH ILLINOIS

Exchange 312-654
CHICAGO - AMERITECH ILLINOIS

Exchange 312-655
CHICAGO - AMERITECH ILLINOIS

Exchange 312-656
Elmhurst - NEXTEL COMMUNICATIONS

Exchange 312-657
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-658
CHICAGO - AMERITECH ILLINOIS

Exchange 312-659
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-660
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-661
CHICAGO - AMERITECH ILLINOIS

Exchange 312-662
CHICAGO - AMERITECH ILLINOIS

Exchange 312-663
CHICAGO - AMERITECH ILLINOIS

Exchange 312-664
CHICAGO - AMERITECH ILLINOIS

Exchange 312-665
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-666
CHICAGO - AMERITECH ILLINOIS

Exchange 312-669
CHICAGO - AMERITECH ILLINOIS

Exchange 312-670
CHICAGO - AMERITECH ILLINOIS

Exchange 312-671
Lombard - UNITED STATES CELLULAR CORP.

Exchange 312-672
CHICAGO - AMERITECH ILLINOIS

Exchange 312-673
- GLOBALCOM, INC.-IL

Exchange 312-674
CHICAGO - AMERITECH ILLINOIS

Exchange 312-675
CHICAGO - AMERITECH ILLINOIS

Exchange 312-676
Chicago -

Exchange 312-677
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-678
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-679
- AIRTOUCH PAGING - ILLINOIS

Exchange 312-680
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-681
CHICAGO - AMERITECH ILLINOIS

Exchange 312-682
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-683
CHICAGO - AMERITECH ILLINOIS

Exchange 312-685
Lombard - UNITED STATES CELLULAR CORP.

Exchange 312-688
Westchester - METROCALL

Exchange 312-689
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-690
- SOURCE ONE WIRELESS

Exchange 312-691
La Grange - BEEPERMART, INC.

Exchange 312-692
CHICAGO - AMERITECH ILLINOIS

Exchange 312-693
CHICAGO - AMERITECH ILLINOIS

Exchange 312-694
CHICAGO - AMERITECH ILLINOIS

Exchange 312-695
CHICAGO - AMERITECH ILLINOIS

Exchange 312-696
CHICAGO - AMERITECH ILLINOIS

Exchange 312-697
CHICAGO - AMERITECH ILLINOIS

Exchange 312-698
Arlington Heights - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-699
BURR RIDGE - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-700
-

Exchange 312-701
CHICAGO - AMERITECH ILLINOIS

Exchange 312-703
CHICAGO - AMERITECH ILLINOIS

Exchange 312-704
CHICAGO - AMERITECH ILLINOIS

Exchange 312-705
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-706
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-707
CHICAGO - AMERITECH ILLINOIS

Exchange 312-709
- SOURCE ONE WIRELESS

Exchange 312-710
CHICAGO - AMERITECH ILLINOIS

Exchange 312-711
-

Exchange 312-712
CHICAGO - AMERITECH ILLINOIS

Exchange 312-713
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-714
CHICAGO - AMERITECH ILLINOIS

Exchange 312-715
CHICAGO - AMERITECH ILLINOIS

Exchange 312-716
CHICAGO - AMERITECH ILLINOIS

Exchange 312-717
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-718
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-719
Lombard - UNITED STATES CELLULAR CORP.

Exchange 312-720
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-724
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-726
CHICAGO - AMERITECH ILLINOIS

Exchange 312-727
CHICAGO - AMERITECH ILLINOIS

Exchange 312-729
CHICAGO - AMERITECH ILLINOIS

Exchange 312-730
Chicago - AT&T LOCAL

Exchange 312-731
Chicago - T-MOBILE USA, INC.

Exchange 312-732
CHICAGO - AMERITECH ILLINOIS

Exchange 312-733
CHICAGO - AMERITECH ILLINOIS

Exchange 312-735
Buffalo Grove - NEXTEL COMMUNICATIONS

Exchange 312-737
CHICAGO - AMERITECH ILLINOIS

Exchange 312-738
CHICAGO - AMERITECH ILLINOIS

Exchange 312-739
CHICAGO - AMERITECH ILLINOIS

Exchange 312-740
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-742
CHICAGO - AMERITECH ILLINOIS

Exchange 312-743
CHICAGO - AMERITECH ILLINOIS

Exchange 312-744
CHICAGO - AMERITECH ILLINOIS

Exchange 312-745
CHICAGO - AMERITECH ILLINOIS

Exchange 312-746
CHICAGO - AMERITECH ILLINOIS

Exchange 312-747
CHICAGO - AMERITECH ILLINOIS

Exchange 312-748
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-749
BURR RIDGE - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-750
CHICAGO - AMERITECH ILLINOIS

Exchange 312-751
CHICAGO - AMERITECH ILLINOIS

Exchange 312-752
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-753
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-755
CHICAGO - AMERITECH ILLINOIS

Exchange 312-756
CHICAGO - AMERITECH ILLINOIS

Exchange 312-758
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-759
CHICAGO - AMERITECH ILLINOIS

Exchange 312-760
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-762
CHICAGO - AMERITECH ILLINOIS

Exchange 312-765
CHICAGO - AMERITECH ILLINOIS

Exchange 312-766
- SOURCE ONE WIRELESS

Exchange 312-768
Chicago - AT&T LOCAL

Exchange 312-769
La Grange - BEEPERMART, INC.

Exchange 312-770
CHICAGO - AMERITECH ILLINOIS

Exchange 312-771
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-775
CHICAGO - AMERITECH ILLINOIS

Exchange 312-776
-

Exchange 312-777
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-780
Elk Grove Village - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-781
CHICAGO - AMERITECH ILLINOIS

Exchange 312-782
CHICAGO - AMERITECH ILLINOIS

Exchange 312-784
Chicago -

Exchange 312-786
CHICAGO - AMERITECH ILLINOIS

Exchange 312-787
CHICAGO - AMERITECH ILLINOIS

Exchange 312-788
CHICAGO - AMERITECH ILLINOIS

Exchange 312-789
CHICAGO - AMERITECH ILLINOIS

Exchange 312-790
CHICAGO - AMERITECH ILLINOIS

Exchange 312-791
CHICAGO - AMERITECH ILLINOIS

Exchange 312-793
CHICAGO - AMERITECH ILLINOIS

Exchange 312-794
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-795
CHICAGO - AMERITECH ILLINOIS

Exchange 312-796
Chicago - AMERITECH ILLINOIS

Exchange 312-797
CHICAGO - AMERITECH ILLINOIS

Exchange 312-798
CHICAGO - AMERITECH ILLINOIS

Exchange 312-799
CHICAGO - AMERITECH ILLINOIS

Exchange 312-801
- SOURCE ONE WIRELESS

Exchange 312-802
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-803
Elk Grove Village - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-804
Chicago - T-MOBILE USA, INC.

Exchange 312-805
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-806
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-807
CHICAGO - AMERITECH ILLINOIS

Exchange 312-808
CHICAGO - AMERITECH ILLINOIS

Exchange 312-810
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-811
-

Exchange 312-812
CHICAGO - AMERITECH ILLINOIS

Exchange 312-813
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-814
CHICAGO - AMERITECH ILLINOIS

Exchange 312-816
BURR RIDGE - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-817
CHICAGO - AMERITECH ILLINOIS

Exchange 312-818
- SOURCE ONE WIRELESS

Exchange 312-819
CHICAGO - AMERITECH ILLINOIS

Exchange 312-820
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-821
Chicago - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-822
CHICAGO - AMERITECH ILLINOIS

Exchange 312-823
CHICAGO - AMERITECH ILLINOIS

Exchange 312-824
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-825
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-826
Chicago - HEARTLAND COMMUNICATIONS, INC.

Exchange 312-827
CHICAGO - AMERITECH ILLINOIS

Exchange 312-828
CHICAGO - AMERITECH ILLINOIS

Exchange 312-829
CHICAGO - AMERITECH ILLINOIS

Exchange 312-830
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-831
CHICAGO - AMERITECH ILLINOIS

Exchange 312-832
CHICAGO - AMERITECH ILLINOIS

Exchange 312-833
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-834
CHICAGO - AMERITECH ILLINOIS

Exchange 312-835
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-836
CHICAGO - AMERITECH ILLINOIS

Exchange 312-837
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-839
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-840
CHICAGO - AMERITECH ILLINOIS

Exchange 312-841
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-842
CHICAGO - AMERITECH ILLINOIS

Exchange 312-844
BURR RIDGE - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-845
CHICAGO - AMERITECH ILLINOIS

Exchange 312-846
CHICAGO - AMERITECH ILLINOIS

Exchange 312-848
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-849
CHICAGO - AMERITECH ILLINOIS

Exchange 312-850
CHICAGO - AMERITECH ILLINOIS

Exchange 312-851
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-852
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-853
CHICAGO - AMERITECH ILLINOIS

Exchange 312-854
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-855
CHICAGO - AMERITECH ILLINOIS

Exchange 312-856
CHICAGO - AMERITECH ILLINOIS

Exchange 312-857
CHICAGO - AMERITECH ILLINOIS

Exchange 312-859
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-860
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-861
CHICAGO - AMERITECH ILLINOIS

Exchange 312-862
CHICAGO -

Exchange 312-863
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-864
CHICAGO - AMERITECH ILLINOIS

Exchange 312-865
Schaumburg - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-867
CHICAGO - AMERITECH ILLINOIS

Exchange 312-869
CHICAGO - AMERITECH ILLINOIS

Exchange 312-870
Chicago - GLOBALCOM, INC.-IL

Exchange 312-872
-

Exchange 312-873
Elk Grove Village - MCI WORLDCOM COMMUNICATIONS, INC. - IL

Exchange 312-875
CHICAGO - AMERITECH ILLINOIS

Exchange 312-876
CHICAGO - AMERITECH ILLINOIS

Exchange 312-877
- SOURCE ONE WIRELESS

Exchange 312-879
CHICAGO - AMERITECH ILLINOIS

Exchange 312-880
CHICAGO - AMERITECH ILLINOIS

Exchange 312-881
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-882
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-884
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-886
CHICAGO - AMERITECH ILLINOIS

Exchange 312-887
CHICAGO - AMERITECH ILLINOIS

Exchange 312-890
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-891
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-892
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-893
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-894
Bensenville - MCIMETRO, ATS, INC.

Exchange 312-895
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-896
Chicago - FOCAL COMMUNICATIONS CORP OF ILLINOIS

Exchange 312-897
- SOURCE ONE WIRELESS

Exchange 312-898
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-899
CHICAGO - AMERITECH ILLINOIS

Exchange 312-900
-

Exchange 312-901
Westchester - METROCALL

Exchange 312-902
CHICAGO - AMERITECH ILLINOIS

Exchange 312-903
BURR RIDGE - AMERITECH MOBILE SERVICES, INC.

Exchange 312-904
CHICAGO - AMERITECH ILLINOIS

Exchange 312-905
CHICAGO - AMERITECH ILLINOIS

Exchange 312-906
CHICAGO - AMERITECH ILLINOIS

Exchange 312-907
Elmhurst - NEXTEL COMMUNICATIONS

Exchange 312-908
CHICAGO - AMERITECH ILLINOIS

Exchange 312-909
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-910
Westchester - METROCALL

Exchange 312-911
-

Exchange 312-912
CHICAGO - AMERITECH ILLINOIS

Exchange 312-913
CHICAGO - AMERITECH ILLINOIS

Exchange 312-914
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-915
CHICAGO - AMERITECH ILLINOIS

Exchange 312-916
- AIRTOUCH PAGING - ILLINOIS

Exchange 312-917
CHICAGO - AMERITECH ILLINOIS

Exchange 312-919
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-920
CHICAGO - AMERITECH ILLINOIS

Exchange 312-922
CHICAGO - AMERITECH ILLINOIS

Exchange 312-923
CHICAGO - AMERITECH ILLINOIS

Exchange 312-924
Chicago - PAETEC COMMUNICATIONS, INC. - IL

Exchange 312-925
- AT&T WIRELESS SERVICES, INC.

Exchange 312-926
CHICAGO - AMERITECH ILLINOIS

Exchange 312-927
Chicago - T-MOBILE USA, INC.

Exchange 312-928
CHICAGO - AMERITECH ILLINOIS

Exchange 312-929
-

Exchange 312-930
CHICAGO - AMERITECH ILLINOIS

Exchange 312-931
CHICAGO - AMERITECH ILLINOIS

Exchange 312-932
CHICAGO - AMERITECH ILLINOIS

Exchange 312-933
Bridgeview - SPRINT SPECTRUM L.P.

Exchange 312-934
Chicago - HEARTLAND COMMUNICATIONS, INC.

Exchange 312-935
CHICAGO - AMERITECH ILLINOIS

Exchange 312-936
CHICAGO - AMERITECH ILLINOIS

Exchange 312-937
Chicago - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-938
CHICAGO - AMERITECH ILLINOIS

Exchange 312-939
CHICAGO - AMERITECH ILLINOIS

Exchange 312-941
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-942
CHICAGO - AMERITECH ILLINOIS

Exchange 312-943
CHICAGO - AMERITECH ILLINOIS

Exchange 312-944
CHICAGO - AMERITECH ILLINOIS

Exchange 312-945
CHICAGO - AMERITECH ILLINOIS

Exchange 312-946
CHICAGO - AMERITECH ILLINOIS

Exchange 312-948
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-949
CHICAGO - AMERITECH ILLINOIS

Exchange 312-950
-

Exchange 312-951
CHICAGO - AMERITECH ILLINOIS

Exchange 312-952
- AT&T WIRELESS SERVICES, INC.

Exchange 312-953
- AT&T WIRELESS SERVICES, INC.

Exchange 312-954
CHICAGO - AMERITECH ILLINOIS

Exchange 312-955
Chicago - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL

Exchange 312-956
- SOURCE ONE WIRELESS

Exchange 312-957
CHICAGO - AMERITECH ILLINOIS

Exchange 312-958
-

Exchange 312-959
-

Exchange 312-960
CHICAGO - AMERITECH ILLINOIS

Exchange 312-961
- AT&T WIRELESS SERVICES, INC.

Exchange 312-962
Chicago - GLOBAL CROSSING LOCAL SERVICES, INC.-IL

Exchange 312-963
- HEARTLAND COMMUNICATIONS, INC.

Exchange 312-965
Hickory Hills - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-968
Northbrook - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-969
Northbrook - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL

Exchange 312-970
CHICAGO - AMERITECH ILLINOIS

Exchange 312-972
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-974
CHICAGO - AMERITECH ILLINOIS

Exchange 312-976
-

Exchange 312-977
CHICAGO - AMERITECH ILLINOIS

Exchange 312-979
CHICAGO - AMERITECH ILLINOIS

Exchange 312-980
Chicago - TELEPORT COMMUNICATIONS GROUP - CHICAGO

Exchange 312-981
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-982
Burr Ridge - ARCH WIRELESS HOLDINGS, INC.

Exchange 312-983
CHICAGO - AMERITECH ILLINOIS

Exchange 312-984
CHICAGO - AMERITECH ILLINOIS

Exchange 312-985
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-986
CHICAGO - AMERITECH ILLINOIS

Exchange 312-987
CHICAGO - AMERITECH ILLINOIS

Exchange 312-988
CHICAGO - AMERITECH ILLINOIS

Exchange 312-990
- SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-991
Buffalo Grove - SOUTHWESTERN BELL MOBILE SYSTEMS, LLC - IL

Exchange 312-992
CHICAGO - AMERITECH ILLINOIS

Exchange 312-993
CHICAGO - AMERITECH ILLINOIS

Exchange 312-994
Chicago - OVATION COMMUNICATIONS OF ILLINOIS, INC.

Exchange 312-996
CHICAGO - AMERITECH ILLINOIS

Exchange 312-997
CHICAGO - AMERITECH ILLINOIS

Exchange 312-998
Addison - MULTI COMPUTER SYSTEMS, INC.