603-586 phone numbers

Numbers 603-586-0000 to 603-586-9999 are assigned to Consolidated Comm of No. New England-Nh (rate centre JEFFERSON, NH, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 603-586-1xxx, 603-586-2xxx, 603-586-3xxx, 603-586-8xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 603-586