320-399 phone numbers

Numbers 320-399-0000 to 320-399-9999 are assigned to Mcc Telephony of Minnesota, LLC (rate centre IRVING, MN, NANPA abbreviation). 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 320-399-7xxx, 320-399-8xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 320-399