North American NumbersUnited States area codes
The United States is the largest part of the North American Numbering Plan (NANP, country code +1). Its telephone numbering — area codes, splits, overlays and relief — is overseen by the FCC together with state public-utility commissions.
States
6 area codes →
1 area code →
5 area codes →
4 area codes →
33 area codes →
6 area codes →
4 area codes →
1 area code →
2 area codes →
23 area codes →
10 area codes →
1 area code →
2 area codes →
17 area codes →
8 area codes →
5 area codes →
4 area codes →
5 area codes →
6 area codes →
1 area code →
6 area codes →
9 area codes →
13 area codes →
8 area codes →
4 area codes →
9 area codes →
1 area code →
3 area codes →
3 area codes →
1 area code →
10 area codes →
2 area codes →
23 area codes →
10 area codes →
1 area code →
15 area codes →
5 area codes →
4 area codes →
15 area codes →
1 area code →
6 area codes →
1 area code →
8 area codes →
29 area codes →
3 area codes →
1 area code →
10 area codes →
6 area codes →
2 area codes →
8 area codes →
1 area code →
Coverage is expanding — more states are being added with the same source-cited discipline. How this is made.