603-609 phone numbers

Numbers 603-609-0000 to 603-609-9999 are assigned to New Cingular Wireless PCS, LLC in Dover, NH. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 603-609-2xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 603-609