603-708 phone numbers

Numbers 603-708-0000 to 603-708-9999 are assigned to Comcast Ip Phone, LLC (rate centre CANTERBURY, NH, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 603-708-2xxx, 603-708-4xxx, 603-708-5xxx, 603-708-6xxx, 603-708-7xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 603-708