Canadial Know Who Called
← Area code 423

423-376 phone numbers

Numbers 423-376-0000 to 423-376-9999 are assigned to Onvoy, LLC (rate centre MADISONVL, TN, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 423-376-3xxx, 423-376-4xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 423-376