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Area code 983

Area code 983 serves Colorado, including Denver, Longmont and Fort Lupton (Mountain time). It has been in service since June 17, 2022 and shares its area with 303 and 720.

Numbers starting with 983 drew 410 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 99 complaints to the FCC since November 2023. The number on your screen can be faked, so a 983 number proves nothing about where a call came from.

Location
ColoradoDenver-Aurora-Centennial, CO Metropolitan Statistical Area
Time zone
Mountain
In service since
June 17, 2022Created from 303
Overlay
Same area as 303, 720
Local calls
Dial 10 digitsArea code needed, even next door
Exchanges in use
48 of 792held by 19 carriers
Projected to run out
3Q 2070NANPA forecast 2026.2

Complaints about 983 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 983. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

410

FCC complaints since November 2023

99

Different 983 numbers reported

446

FCC complaints naming a 983 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 20234
December 20231
January 20240
February 20240
March 20240
April 20242
May 20241
June 20247
July 20242
August 20240
September 20240
October 20240
November 20241
December 20244
January 20252
February 20253
March 20254
April 20253
May 20252
June 20252
July 20252
August 20252
September 20251
October 20250
November 20252
December 20251
January 20264
February 20263
March 20264
April 20267
May 20262
June 20267
July 20264
August 20264
September 20268
October 20269

What people said 983 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 293 of 410 reports were robocalls.

Show as a table
SubjectReports
Reducing your debt (credit cards, mortgage, student loans)168
Other138
Dropped call or no message31
Home improvement and cleaning16
Calls pretending to be government, businesses, or family and friends14
Medical and prescriptions7

Places served by 983

NANPA lists 7 rate centers for 983. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Denver33
  • Longmont7
  • Fort Lupton3
  • Strasburg2
  • Deckers1
  • Keenesburg1
  • Roggen1

Phone companies holding 983 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 94% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 19 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Onvoy, LLC - CO13
Wide Voice, LLC - CO7
New Cingular Wireless PCS, LLC4
Cellco Partnership dba Verizon Wireless - CO3
Shelcomm3
Ahoi LLC2
Onvoy Spectrum, LLC2
Opentact Inc.2

When today's 983 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
20238
202412
202513
202615

Check a 983 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in Colorado

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show