603-504 phone numbers

Numbers 603-504-0000 to 603-504-9999 are assigned to Omnipoint Miami E License, LLC in Claremont, NH. 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 603-504-7xxx, 603-504-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 603-504