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320 Area Code

Area code 320 serves St. Cloud, Willmar, Sartell, Buffalo, Alexandria and nearby communities in Minnesota. It has been in service since March 17, 1996, when it was split from 612.

StateMinnesota
Time zoneCentral
Local time now…
Prefixes in use511
Projected to run out2070
St. CloudWillmarSartellBuffaloAlexandriaHutchinsonSauk RapidsLittle FallsWaite ParkSt. JosephLitchfieldGlencoeMontevideoMorrisSt. CloudWillmarSartellBuffaloAlexandriaHutchinson
Cities and towns served by area code 320

Who issues 320 numbers

Mobile 17%VoIP and cable 23%Landline 60%

Share of the 511 prefixes (the three digits after 320) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Onvoy (Sinch)63
Verizon Wireless57
Lumen (Qwest)42
Lumen (CenturyLink)32
Frontier30
AT&T Mobility28
Lumen (Level 3)23
Aerial Communications22

Cities and towns in area code 320

CityPopulationOther area codes
St. Cloud72,647
Willmar22,001
Sartell19,918
Buffalo16,878
Alexandria15,045
Hutchinson14,655
Sauk Rapids13,768
Little Falls9,277
Waite Park8,450
St. Joseph6,846
Litchfield6,528
Glencoe5,632
Montevideo5,335
Morris5,150

Got a call from 320?

A 320 number was originally issued in Minnesota, but that does not prove the caller is there. 23% of 320 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 511 prefixes in area code 320

Format: (320) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 320

Where is area code 320?
Area code 320 is in Minnesota. It covers St. Cloud, Willmar, Sartell, Buffalo, Alexandria, Hutchinson and 8 more cities and towns.
What time zone is area code 320?
Area code 320 is in the Central time zone.
Is 320 a toll-free number?
No. 320 is a geographic area code in Minnesota. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Will area code 320 run out of numbers?
NANPA's latest forecast projects area code 320 to exhaust in the second quarter of 2070. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Minnesota