603-690 phone numbers

Numbers 603-690-0000 to 603-690-9999 are assigned to Mcimetro Access Transmission Services LLC in Claremont, NH. 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 603-690-4xxx, 603-690-7xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 603-690