← Area code 207
207-533 phone numbers
Numbers 207-533-0000 to 207-533-9999 are assigned to Oxford West Telephone Company (rate centre UPTON, ME, NANPA abbreviation). 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 207-533-0xxx, 207-533-1xxx, 207-533-4xxx, 207-533-5xxx, 207-533-7xxx, 207-533-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.