Northbrook, Illinois Area Codes & Phone Number Distribution

Estimated Number of Assigned Phone Numbers in Northbrook, Illinois

2,500,000

In Northbrook, Illinois, wireless numbers account for 74.9% of assigned numbers, above the statewide average of 38.9%. Northbrook's wireline and VoIP share is 38.4 percentage points lower than the statewide average. Compared with the state overall, Northbrook has a more concentrated wireless assignment mix. Northbrook is served by 11 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 Northbrook, Illinois

224 312 331 464 630 708 773 779 815 847 872

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

Total assigned 2,500,000

Wireless

1,872,000 assigned numbers

74.88%

Other / Unclassified

352,000 assigned numbers

14.08%

Wireline and VoIP

276,000 assigned numbers

11.04%

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

Estimated assigned wireless phone numbers: 1,872,000

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

Verizon Wireless 887,000 (47.38%)

T-Mobile 602,000 (32.16%)

AT&T Wireless 383,000 (20.46%)

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

Estimated assigned wireline and VoIP phone numbers: 276,000

AT&T 126,000 (45.65%)

Onvoy 53,000 (19.20%)

Lumen 37,000 (13.41%)

Bandwidth 16,000 (5.80%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 11,000 (3.99%)

Comcast Business 8,000 (2.90%)

Peerless Network 7,000 (2.54%)

PAETEC ITEL, LLC 6,000 (2.17%)

TERRA NOVA TELECOM INC. 4,000 (1.45%)

RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 3,000 (1.09%)

Spectrum 3,000 (1.09%)

Telnyx 1,000 (0.36%)

Other / Unclassified Assigned Numbering in Northbrook, Illinois

Estimated assigned other or unclassified phone numbers: 352,000

SPOK, INC. 200,000 (56.82%)

AMERICAN MESSAGING SERVICES, LLC 110,000 (31.25%)

FIRST COMMUNICATIONS, LLC 17,000 (4.83%)

INDIANA PAGING NETWORK, INC. 10,000 (2.84%)

ACCESS ONE, INC. - IL 4,000 (1.14%)

FRACTEL, LLC 3,000 (0.85%)

IP HORIZON LLC 3,000 (0.85%)

TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2,000 (0.57%)

HD CARRIER LLC 1,000 (0.28%)

STRATUS NETWORKS 1,000 (0.28%)

TON80 COMMUNICATIONS, LLC 1,000 (0.28%)

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 Northbrook, 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.