← Area code 320
320-620 phone numbers
Numbers 320-620-0000 to 320-620-9999 are assigned to Onvoy, LLC in Glencoe, MN. 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 320-620-2xxx, 320-620-3xxx, 320-620-4xxx, 320-620-5xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.