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AREA CODE · COLORADO

Area code 983

Area code 983 covers Denver, Colorado. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: Colorado Major City: Denver Mountain Time (MT) Overlay: 303/720/983
01 / WHERE IT IS

Where is area code 983?

Area code 983 is assigned to Denver and the surrounding region in Colorado. Calls to numbers that start with 983 are routed to this area.

Area code 983 shares its territory with 303, 720. Because it is an overlay, local calls require dialing all 10 digits.

Counties covered

Denver CountyBoulder CountyWeld CountyAdams CountyDouglas County

Line types

  • Mobile 28.95%
  • Landline 71.05%
02 / MAP

Area code 983 on the map

The shaded area joins the code’s numbering centers; the marker shows its main city.

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© OpenStreetMap contributors

03 / LOCAL TIME

Current time in Denver

This area code is in the Mountain Time (MT) time zone.

Local timeDenver, CO--:--:--

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America/DenverLive
04 / HOW TO DIAL

How to call Denver

WITHIN THE US983 XXX XXXX

Always 10 digits — landline, mobile or VoIP. Local, long distance or a different state: the format is always the same. You do not need to dial the 1 first.

FROM ABROAD+1 983 XXX XXXX

Exit codes: 00 Europe/Mexico · 011 Canada · 010 Japan · + universal

WHATSAPP / IMESSAGE+1 983 XXX XXXX

Always save the number in international format so messaging apps recognize it correctly:

Call typeTraditional landlineMobile / VoIP
Local (same area code)10 digits10 digits
US long distance1 + 10 digits10 digits
Emergency911911
🌐Universal+1 983 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 983 555 0123
🇦🇺Australia0011 1 983 555 0123
🇯🇵Japan010 1 983 555 0123
HAVE THE FULL NUMBER?

Learn more about that number.

Check the line type and the carrier the number block was originally assigned to.

10 digits to see the carrier and line type of the number

05 / CARRIERS

Carriers in area code 983

Share of the number blocks by carrier and line type.

Landline

Sinch
30%
Wide Voice
22%
AT&T
11%
AHOI
7%
Nuso
4%
Others
26%

Mobile

Shelcomm
27%
AT&T Mobility
27%
Sinch
18%
Verizon Wireless
18%
T-MOBILE USA
9%

Carrier shown is the original assignment of each number block and may differ today because of number portability.

06 / PREFIXES

Complete list of prefixes for area code 983

38 number blocks (NXX) assigned in this area code.

PrefixTypeCityCarrier
(983) 200 Landline Longmont NusoNUSO, LLC
(983) 201 Landline Denver AT&TTELEPORT COMMUNICATIONS AMERICA, LLC - CO
(983) 202 Mobile Denver Shelcomm
(983) 203 Landline Denver SinchONVOY, LLC - CO
(983) 204 Landline Denver SinchONVOY, LLC - CO
(983) 205 Mobile Strasburg Shelcomm
(983) 206 Mobile Fort Lupton Shelcomm
(983) 207 Landline Longmont SinchONVOY, LLC - CO
(983) 208 Mobile Denver AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC
(983) 209 Mobile Fort Lupton T-MOBILE USAT-MOBILE USA, INC.

Showing 10 of 38 prefixes

07 / FAQ

Frequently asked questions about area code 983

Where is area code 983 used?
Area code 983 serves Denver and the surrounding area in Colorado, including Denver County, Boulder County, Weld County, Adams County, Douglas County.
What city is area code 983 from?
The main city of area code 983 is Denver, CO.
What time zone is area code 983 in?
Area code 983 is in the Mountain Time (MT) time zone (America/Denver).
Is 983 an overlay area code?
Yes. It shares its territory with 303, 720. In an overlay, every call requires dialing all 10 digits.
How do I call a number with area code 983 from the United States?
Dial the 10 digits: 983 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 983 number from another country?
Dial your country's exit code (or +), then 1, then 983 and the seven-digit number. From a mobile you can use +1 983 XXX XXXX.
Which carriers use area code 983?
Most landline blocks belong to Sinch and most mobile blocks to Shelcomm. The carrier shown is the original assignment and may differ today because of number portability.
Is area code 983 for landlines, mobiles or both?
Both. About 71.05% of the number blocks are landline, 28.95% mobile.
How do I save a 983 number in WhatsApp or my phone?
Save it in international format: +1 983 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 983?
The area code only shows the region a number was assigned to; it does not tell you who is calling. Scammers can fake any area code, so do not share personal or banking information with unknown callers, and let unknown numbers go to voicemail.
KEEP EXPLORING

Nearby area codes

307Cheyenne, WY308Grand Island, NE505Albuquerque, NM385Salt Lake City, UT435St George, UT801Salt Lake City, UT

Other area codes in Colorado

303 · Denver719 · Colorado Springs-Main720 · Denver970 · Fort Collins

View all Colorado area codes →