← Area code 603
603-282 phone numbers
Numbers 603-282-0000 to 603-282-9999 are assigned to Mcimetro Access Transmission Services LLC in Canaan, NH. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 603-282-0xxx, 603-282-3xxx, 603-282-5xxx, 603-282-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.