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983 Area Code

Area code 983 serves Denver, Aurora, Lakewood, Thornton, Arvada and nearby communities in Colorado. It has been in service since June 17, 2022, when it was split from 303.

StateColorado
Time zoneMountain
Local time now…
Prefixes in use47
Overlay with303, 720
Projected to run out2069
DenverAuroraLakewoodThorntonArvadaWestminsterCentennialBoulderLongmontBroomfieldCommerce CityLittletonErieNorthglennEnglewoodWheat RidgeLafayetteFour Square MileLouisvilleSherrelwoodFrederickWelbyGreenwood VillageFederal HeightsCherry CreekBerkleyGunbarrelDerbyTwin LakesDaconoCherry Hills VillageSheridanDove ValleyShaw HeightsTodd CreekMeridianDenverThorntonCentennialBoulderLongmont
Cities and towns served by area code 983

Who issues 983 numbers

Mobile 17%VoIP and cable 40%Landline 43%

Share of the 47 prefixes (the three digits after 983) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Onvoy (Sinch)14
Wide Voice7
AT&T Mobility4
Shelcomm3
Verizon Wireless3
AT&T (Teleport)2
Ahoi2
Opentact2

Cities and towns in area code 983

CityPopulationOther area codes
Denver740,613303, 720
Aurora410,053303, 720
Lakewood156,927303, 720
Thornton147,766303, 720
Arvada122,901303, 720
Westminster116,182303, 720
Centennial108,658303, 720
Boulder105,689720, 303
Longmont100,109720, 303
Broomfield79,174720, 303
Commerce City72,345303, 720
Littleton46,246303, 720
Erie40,904720, 303
Northglenn38,893303, 720
Englewood35,305303, 720
Wheat Ridge32,081303, 720
Lafayette30,116720, 303
Four Square Mile21,788303, 720
Louisville20,581720, 303
Sherrelwood19,368303, 720
Frederick18,241720, 303
Welby16,232303, 720
Greenwood Village15,323303, 720
Federal Heights14,075303, 720
Cherry Creek11,011303, 720
Berkley10,838303, 720
Gunbarrel10,424720, 303
Derby8,692303, 720
Twin Lakes8,279303, 720
Dacono6,844720, 303
Cherry Hills Village6,389303, 720
Sheridan5,972303, 720
Dove Valley5,313303, 720
Shaw Heights5,309303, 720
Todd Creek5,069303, 720
Meridian5,058303, 720

Got a call from 983?

A 983 number was originally issued in Colorado, but that does not prove the caller is there. 40% of 983 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 47 prefixes in area code 983

Format: (983) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 983

Where is area code 983?
Area code 983 is in Colorado. It covers Denver, Aurora, Lakewood, Thornton, Arvada, Westminster and 30 more cities and towns.
What time zone is area code 983?
Area code 983 is in the Mountain time zone.
Is 983 a toll-free number?
No. 983 is a geographic area code in Colorado. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 983 share its area with 303 and 720?
303, 720 and 983 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 983 run out of numbers?
NANPA's latest forecast projects the 303/720/983 overlay to exhaust in the second quarter of 2069. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Colorado