Caller ID for
Area code 983
Area code 983 Denver, Colorado
Area code 983 is one of the newer area codes, added in 2022 to Colorado, with numbers assigned in Denver, Longmont, Fort Lupton and 2 more places. It’s 10:13 PM there now.
- State
- Colorado6 area codes in Colorado
- Time zone
- Mountain10:13 PM there now
- Exchanges
- 485 places
- Overlay
- 303 and 720Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 983 is
Numbers in 983 are assigned to 5 places in 5 counties: Denver County, Weld County, Boulder County, Adams County and Arapahoe County.
Denver holds most of them: 69% of the exchanges.
- Denver33
- Longmont7
- Fort Lupton3
- Strasburg2
- Keenesburg1
Phone companies in 983
48 blocks of numbers in 983 are held by 19 phone companies. The most belong to Inteliquent (13), Wide Voice (7) and AT&T Mobility (4).
A large share, about 79%, belongs to competitive and internet phone carriers; wireless networks hold 17% and local phone and cable companies 4%.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
983 went into service in 2022, added to the area of 303.
303 (since 1947) and 720 (since 1998) share the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
48 new exchanges were assigned since 2021, the latest in October 2026.
Calling 983
It’s 10:13 PM Mountain time in 983 right now.
From elsewhere in the U.S., dial 1, 983 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
Colorado has 6 area codes: 303, 719, 720, 748, 970 and 983.
- 748 · Durango, CO · about 68 mi
- 970 · Fort Collins, CO · about 76 mi
- 719 · Colorado Springs, CO · about 92 mi
- 307 · Cheyenne, WY · about 231 mi
- 308 · Grand Island, NE · about 254 mi
- 505 · Albuquerque, NM · about 320 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 983 area code
Map of the 983 area code around Denver, Longmont and Fort Lupton, Colorado.
Cities on the map
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Questions about 983
Where is area code 983?
In Colorado, covering Denver, Longmont and Fort Lupton and other places across 5 counties.
What time zone is 983 in?
Mountain time. It was 10:13 PM there when this page loaded.
Is 983 an overlay?
Yes. 303 and 720 serve the same area, so dial all 10 digits for local calls.
Which phone companies have 983 numbers?
19 companies hold blocks; the most belong to Inteliquent, Wide Voice and AT&T Mobility. About 17% of blocks are wireless.
Is 983 running out of numbers?
Not on record. 48 new exchanges have been assigned since 2021.