Area code 320

Where area code 320 is

320 is one of 8 geographic area codes serving Minnesota; NANPA records its in-service date as March 17, 1996. It is not part of an overlay, so every number in its territory starts with 320. It is in the Central time zone. The places with the most assigned exchanges include St. Cloud, Willmar, Alexandria, Little Falls, and Hutchinson. By population, its largest named places are St. Cloud, Willmar, Alexandria, Hutchinson, and Little Falls.

Places served by 320

320 holds 14% of the 3,755 central office codes assigned in Minnesota, the 4th most of the state's 8 codes. 138 Census places could be matched to rate centers with 320 exchanges; the most populous are St. Cloud (72,145), Willmar (21,892), Alexandria (14,914), and Hutchinson (14,708). Each place page lists the exact prefixes and carriers for that town.

Ten-digit and seven-digit dialing in 320

According to NANPA's dialing-plan data, local calls within 320 are dialed as seven digits and toll calls as 1 plus ten digits. Seven-digit local dialing is still permitted here, but customers calling from other area codes, and every mobile contact list, use all ten digits.

Who holds 320 exchanges

79 carriers hold the 511 central office codes assigned in 320. Onvoy, LLC - MN has the most, with 58 (11%). 369 of the codes (72%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Rate centers and towns in 320

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 320 has codes in 145 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

320 code assignments over time

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 511 are assigned in 320, 64% of 800. 68 were assigned in 2020 or later.

A local 320 number on Callata

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

Porting a number you already use in area code 320 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.