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US area code · Colorado

Area code 983

Where the 983 area code is, its overlay and how to dial a +1 983 number from anywhere.

CoversColoradoTime zoneMountain (MT)TypeOverlay
Quick answer

The 983 area code is in Colorado, United States (Mountain (MT)). To call from abroad: +1 983 555-0123. It is an overlay, so all 10 digits are dialled.

StateColorado
Time zoneMountain (MT)
TypeOverlay
10-digit dialingRequired
In service since27-May-2021

The 983 area code is a geographic North American Numbering Plan (NANP) code covering Colorado. It has been in service since 27-May-2021 and sits in the Mountain (MT) time zone.

Overlay 983 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

983303720

How to dial a 983 number

From abroad+1 983 555-0123
Within the US / Canada1 983 555-0123
Locally (same area)983 555-0123

Other Colorado area codes

303719720748970

Frequently asked questions

Where is the 983 area code?

The 983 area code is in Colorado, United States (Mountain (MT)).

Is 983 an overlay area code?

Yes. 983 overlays the same region as 303, 720, so callers dial all 10 digits.

Do I have to dial 10 digits for 983?

Yes — dial the area code plus the seven-digit number.

How do I call a 983 number from another country?

Dial your exit code (or +), then 1, then 983, then the number: +1 983 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 983 number does not pinpoint a street or ZIP code.

Missed a call from +1 983?

In the 30 days to September 24, 2026, 167 unwanted calls showing a 983 number were reported to the US Federal Trade Commission, 75% of them recorded messages or robocalls. That puts 983 at #347 of 670 area codes reported.

Reducing your debt (credit cards, mortgage, student loans)77
Other54
Dropped call or no message7
Home improvement & cleaning6
Before you call back
  • If you do not know anyone in Colorado, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 983 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 983 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 983:

Onvoy, LLC 11Multiple Ocn Listing 9Wide Voice, LLC 7 5New Cingular Wireless PCS, LLC 4Shelcomm 3

About 11.9% of the 59 prefixes in use belong to mobile carriers: a 983 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 983 — cities & rate centres