Chicago, Illinois Area Codes & Phone Number Distribution

Estimated Number of Assigned Phone Numbers in Chicago, Illinois

16,124,000

In Chicago, Illinois, wireless numbers account for 40.7% of assigned numbers, above the statewide average of 38.9%. Chicago is served by 9 area codes, more than the typical Illinois locality, because it sits in an overlay area where multiple area codes share the same geographic region.

Area Codes Used by Chicago, Illinois

224 312 331 464 630 708 773 847 872

Estimated Service-Type Mix of Assigned Phone Numbers in Chicago, Illinois

Total assigned 16,124,000

Wireline and VoIP

8,181,000 assigned numbers

50.74%

Wireless

6,567,000 assigned numbers

40.73%

Other / Unclassified

1,376,000 assigned numbers

8.53%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Chicago, Illinois

Estimated assigned wireless phone numbers: 6,567,000

Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.

T-Mobile 3,540,000 (53.91%)

AT&T Wireless 1,858,000 (28.29%)

Verizon Wireless 1,168,000 (17.79%)

Optimum Mobile 1,000 (0.02%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Chicago, Illinois

Estimated assigned wireline and VoIP phone numbers: 8,181,000

AT&T 4,310,000 (52.68%)

Onvoy 1,148,000 (14.03%)

Bandwidth 959,000 (11.72%)

Lumen 494,000 (6.04%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 231,000 (2.82%)

Spectrum 200,000 (2.44%)

PAETEC ITEL, LLC 198,000 (2.42%)

Comcast Business 194,000 (2.37%)

Peerless Network 152,000 (1.86%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 77,000 (0.94%)

RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 69,000 (0.84%)

Telnyx 54,000 (0.66%)

Other / Unclassified Assigned Numbering in Chicago, Illinois

Estimated assigned other or unclassified phone numbers: 1,376,000

SPOK, INC. 440,000 (31.98%)

TELEPORT COMMUNICATIONS AMERICA, LLC - IL 253,000 (18.39%)

FIRST COMMUNICATIONS, LLC 226,000 (16.42%)

AMERICAN MESSAGING SERVICES, LLC 210,000 (15.26%)

IP HORIZON LLC 51,000 (3.71%)

ACCESS ONE, INC. - IL 50,000 (3.63%)

INDIANA PAGING NETWORK, INC. 40,000 (2.91%)

TON80 COMMUNICATIONS, LLC 33,000 (2.40%)

FRACTEL, LLC 16,000 (1.16%)

HD CARRIER LLC 12,000 (0.87%)

CLEAR RATE COMMUNICATIONS, LLC 11,000 (0.80%)

STRATUS NETWORKS 11,000 (0.80%)

How These Figures Were Built

These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with Chicago, Illinois, not live customer counts.

Some providers may have assigned phone numbers tied to this locality even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.

They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.