← Area code 320
320-303 phone numbers
Numbers 320-303-0000 to 320-303-9999 are assigned to Verizon Wireless in Glenwood, MN. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 320-303-1xxx, 320-303-3xxx, 320-303-4xxx, 320-303-5xxx, 320-303-6xxx, 320-303-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.