← Area code 207
207-388 phone numbers
Numbers 207-388-0000 to 207-388-9999 are assigned to Oxford County Tel. & Tel. Co. (rate centre SUMNER, ME, NANPA abbreviation). 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 207-388-0xxx, 207-388-1xxx, 207-388-4xxx, 207-388-5xxx, 207-388-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.