Area Code 320 – Minnesota
The phone area code for Minnesota is 320 (international format +1320). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 320
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Minnesota
Geographic Coverage and Jurisdiction
Area code 320 is a geographic North American Numbering Plan (NANP) code assigned to the U.S. state of Minnesota. It serves a predominantly rural and suburban region in the central part of the state, encompassing a mix of agricultural communities, regional trade centers, and smaller cities. The numbering plan area (NPA) is administered by the Minnesota Public Utilities Commission and is utilized by both incumbent local exchange carriers (ILECs) and competitive local exchange carriers (CLECs).
Primary Cities and Communities
The 320 area code covers a broad swath of central Minnesota, including the cities of St. Cloud, Willmar, Hutchinson, Litchfield, and Little Falls. St. Cloud, the largest city in the region, is a significant economic and educational hub, home to St. Cloud State University. Other notable communities include Sartell, Sauk Rapids, Waite Park, and Alexandria. The region is characterized by its lakes, agriculture, and growing healthcare and manufacturing sectors.
Dialing Formats and Procedures
For local calls within the 320 area code, callers must use the 10-digit dialing format: 320-XXX-XXXX. This applies to all calls, including those between different cities within the same area code, as mandated by the Federal Communications Commission (FCC) to ensure uniformity and to facilitate the potential introduction of an overlay code. For calls originating from outside the 320 area code but within the United States, the international format is +1 320 XXX XXXX. When dialing from abroad, callers should replace the leading '1' with the appropriate international access code (e.g., 011 from most countries) and then dial 1 320 XXX XXXX.
Overlay Considerations and Numbering Resources
As of the latest data, area code 320 does not have an overlay code, meaning it is the sole area code serving this geographic region. However, due to increasing demand for new telephone numbers, an overlay may be introduced in the future. If an overlay is implemented, 10-digit dialing will remain mandatory, and new numbers may be assigned with a different area code. Businesses and residents should be prepared for potential changes in dialing procedures.
Caller Instructions
Local callers: Always dial 10 digits (area code + 7-digit number) for all calls within the 320 region, even for calls to a neighboring town. Long-distance callers within the U.S.: Dial 1 + 320 + 7-digit number. International callers: Dial your country's exit code, then 1, then 320, then the 7-digit number. For example, to call a number in St. Cloud from abroad, you would dial +1 320 555 0123.
Regulatory and Technical Notes
Area code 320 is part of the North American Numbering Plan and is subject to the rules and regulations of the FCC and the NANP Administration. Number portability allows customers to retain their 320 numbers when switching service providers within the same geographic area. The code is used for both wireline (PSTN) and VoIP services, and some mobile numbers may also be assigned to this area code, although mobile numbers are not geographically bound. For up-to-date information on numbering resources and any potential changes, consult the Minnesota Public Utilities Commission or the NANP Administrator.