West region · Mountain Time
Wyoming Area Codes
All 1 area code serving Wyoming, the cities each one covers, and which are overlays. Wyoming is served by 1 area code in the Mountain Time zone.
Last updated June 5, 2026
Full list
Every Wyoming area code
Wyoming is served by 1 area code in the Mountain Time zone. It is a single-code state, so seven-digit local dialing may still work in many places.
| Code | Main city | Type | Status |
|---|---|---|---|
| 307 | Cheyenne | Geographic | In service |
Area codes and dialing in Wyoming
Wyoming is one of the few US states still covered by a single area code, 307. Because there's no overlap, many local calls can still be completed with seven digits, although dialing the full 10-digit number always works and is the safer habit. 307 serves Cheyenne and the rest of the state, all in the Mountain Time zone.
If Wyoming ever exhausts its supply of numbers, regulators would almost certainly add an overlay rather than split the state — the modern approach that lets everyone keep their existing number. For now, every Wyoming number shares the 307 code. Learn the background in how area codes work.
Browse Wyoming another way
Explore by West region, by time zone, or jump to the city index. You can also see the complete numeric list of every US area code.
Quick answers
Wyoming area code FAQ
How many area codes does Wyoming have?
Wyoming currently has 1 area code: 307.
What is the main area code for Wyoming?
The busiest metro in Wyoming is served by the 307 code. Major cities include Cheyenne.
Does Wyoming require 10-digit dialing?
Much of the state still permits 7-digit local calls, though 10-digit dialing always works. Ten-digit dialing is the national standard.