Question 1

Where is area code 307?

Accepted Answer

Area code 307 covers Cheyenne and nearby cities including Casper, Gillette, Laramie in Wyoming, in the Mountain Time.

Question 2

What cities use area code 307?

Accepted Answer

Area code 307 serves Cheyenne, Casper, Gillette, Laramie in Wyoming.

Question 3

What time zone is area code 307 in?

Accepted Answer

Area code 307 is in the Mountain Time (America/Denver).

Question 4

How do you dial a 307 number?

Accepted Answer

Dial all 10 digits: 307 followed by the 7-digit local number. From abroad, dial +1 307 and the local number.

Question 5

Is a call from area code 307 a scam?

Accepted Answer

A 307 number is geographically tied to Wyoming, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.

Question 6

Is 307 a country code?

Accepted Answer

No. 307 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 307 number written for international dialing looks like +1 307 followed by the 7-digit local number.

Area Code 307

Cities in area code 307

Area codes by city

Carriers in area code 307

Nearby area codes