Metropolitan Minneapolis area codes with 612 in yellow
A map of Minnesota area codes
Minnesota area codes before 1954
Numbering plan area 218 before 1954
A map of Minnesota area codes

When the American Telephone and Telegraph Company (AT&T) created the first nationwide telephone numbering plan in 1947, Minnesota was divided into two numbering plan areas (NPAs), which were identified with area codes 612 and 218.

- Area code 612

The southeastern portion, including the Twin Cities, was located in area code 612.

- Area code 218
Metropolitan Minneapolis area codes with 612 in yellow

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Alpha

A map of Minnesota area codes. 507 is in dark brown.

Area code 507

Telephone numbering plan code for the southern fifth of Minnesota, including cities such as Rochester, Mankato, Worthington, Fairmont, Albert Lea, Northfield, and Austin.

Telephone numbering plan code for the southern fifth of Minnesota, including cities such as Rochester, Mankato, Worthington, Fairmont, Albert Lea, Northfield, and Austin.

A map of Minnesota area codes. 507 is in dark brown.

It was the third area code created for use in the state in 1954, following the original 218 and 612.

A map of Minnesota area codes. Area code 320 is in light brown.

Area code 320

Telephone numbering plan code covering most of central Minnesota, excluding the Twin Cities metro.

Telephone numbering plan code covering most of central Minnesota, excluding the Twin Cities metro.

A map of Minnesota area codes. Area code 320 is in light brown.

It was created in 1996 by carving out of the western part of area code 612, which originally stretched border-to-border from Wisconsin through the Twin Cities to South Dakota.

Area code 218 borders 320 to the north, and area code 507 covers southern Minnesota.