774-399 phone numbers

Numbers 774-399-0000 to 774-399-9999 are assigned to Bandwidth.com CLEC, LLC (rate centre WESTBORO, MA, NANPA abbreviation). 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 774-399-3xxx, 774-399-4xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 774-399