307 Area Code
Wyoming, USA
Local time now · Mountain Time
1:43 AM
Area code 307 is in Wyoming, USA, serving Cheyenne, Casper, Gillette and Laramie. It uses Mountain Time — the time there now is 1:43 AM. In service since 1947.
| Area code | 307 |
|---|---|
| Location | Wyoming, USA |
| Major cities | Cheyenne, Casper, Gillette, Laramie, Rock Springs, Sheridan, Green River, Evanston |
| Time zone | Mountain Time |
| In service since | 1947 |
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Frequently asked questions
Where is area code 307?
Wyoming, USA — including Cheyenne, Casper, Gillette, Laramie and Rock Springs.
What time zone is area code 307?
Mountain Time.
How do I call a 307 number from abroad?
Dial your international access code, then 1 (the country code), then 307 and the 7-digit number — for example +1 307 555 0100. From the UK or India dial 00 1 307 …; from Bangladesh 00 1 307 … .
Is a call from 307 a scam?
Not by itself — 307 is an ordinary geographic area code in Wyoming. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.