Dekalb, Illinois Area Codes & Phone Number Distribution

Estimated Number of Assigned Phone Numbers in Dekalb, Illinois

345,000

In Dekalb, Illinois, wireless numbers account for 60.6% of assigned numbers, above the statewide average of 38.9%. Dekalb's wireline and VoIP share is 12.0 percentage points lower than the statewide average. Compared with the state overall, Dekalb has a more concentrated wireless assignment mix. Dekalb is served by 2 area codes in an overlay area, meaning multiple area codes cover the same geographic region.

Area Codes Used by Dekalb, Illinois

779 815

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

Total assigned 345,000

Wireless

209,000 assigned numbers

60.58%

Wireline and VoIP

129,000 assigned numbers

37.39%

Other / Unclassified

7,000 assigned numbers

2.03%

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

Estimated assigned wireless phone numbers: 209,000

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

T-Mobile 125,000 (59.81%)

Verizon Wireless 52,000 (24.88%)

AT&T Wireless 22,000 (10.53%)

UScellular 10,000 (4.78%)

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

Estimated assigned wireline and VoIP phone numbers: 129,000

Verizon 60,000 (46.51%)

Onvoy 22,000 (17.05%)

Lumen 18,000 (13.95%)

Spectrum 9,000 (6.98%)

Comcast Business 6,000 (4.65%)

YMAX COMMUNICATIONS CORP. - IL 5,000 (3.88%)

NUSO 4,000 (3.10%)

AT&T 1,000 (0.78%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1,000 (0.78%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 1,000 (0.78%)

SKYE TELECOM LLC DBA SKYETEL 1,000 (0.78%)

Telnyx 1,000 (0.78%)

Other / Unclassified Assigned Numbering in Dekalb, Illinois

Estimated assigned other or unclassified phone numbers: 7,000

TELEPORT COMMUNICATIONS AMERICA, LLC - IL 3,000 (42.86%)

DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL 2,000 (28.57%)

MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 1,000 (14.29%)

STRATUS NETWORKS 1,000 (14.29%)

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 Dekalb, 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.