Area Code Overview

Area code 983 is a geographic telephone area code in Colorado that went into service on June 17, 2022. The geographic regions covered by this area code overlay has a population of approximately 967,697.

Overlay and Dialing Rules

Area Code: 983
State: Colorado
Type: General Purpose Code
In Service Date: June 17, 2022
Overlay Complex: 303/720/983
Local Dialing Plan: This area does require you to dial the area code when calling locally.

Estimated Number of Assigned Phone Numbers in Area Code 983

This area code is ranked 351st out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 5th out of 5.

341,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 983

Total assigned 341,000

Wireless

136,000 assigned

39.88%

Wireline and VoIP

146,000 assigned

42.82%

Other / Unclassified

59,000 assigned

17.30%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 983

Estimated assigned wireless phone numbers: 136,000

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

AT&T Wireless 74,000 (54.41%)

Verizon Wireless 60,000 (44.12%)

T-Mobile 2,000 (1.47%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 983

Estimated assigned wireline and VoIP phone numbers: 146,000

Onvoy 80,000 (54.79%)

Bandwidth 14,000 (9.59%)

Spectrum 12,000 (8.22%)

MASH TELECOM INC. 10,000 (6.85%)

NUSO 8,000 (5.48%)

Wide Voice 7,000 (4.79%)

Lumen 5,000 (3.42%)

Comcast Business 3,000 (2.05%)

LEAP TELECOM, LLC 2,000 (1.37%)

Peerless Network 2,000 (1.37%)

EON TELECOM, INC. 1,000 (0.68%)

TERRA NOVA TELECOM INC. 1,000 (0.68%)

Other / Unclassified Assigned Numbering in Area Code 983

Estimated assigned other or unclassified phone numbers: 59,000

SHELCOMM 30,000 (50.85%)

TELEPORT COMMUNICATIONS AMERICA, LLC - CO 13,000 (22.03%)

HD CARRIER LLC 7,000 (11.86%)

AHOI LLC 2,000 (3.39%)

OPENTACT INC. 2,000 (3.39%)

TELIMIZE, LLC 2,000 (3.39%)

ALLO COMMUNICATIONS LLC 1,000 (1.69%)

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1,000 (1.69%)

WAVENATION, LLC 1,000 (1.69%)

Cities and Towns in Area Code 983

Allenspark, Colorado Bennett, Colorado Byers, Colorado Deckers, Colorado Deer Trail, Colorado Denver, Colorado Fort Lupton, Colorado Georgetown, Colorado Hudson, Colorado Keenesburg, Colorado Longmont, Colorado Roggen, Colorado Strasburg, Colorado

These geographic regions are also served by area codes 303 and 720.

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 area code 983, not live customer counts.

Some providers may have assigned phone numbers tied to this area code 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.

Population data and locality matching provided by GeoNames.

Last refreshed: April 15, 2026 6:22 pm