Canadial Know Who Called
← Area code 571

571-600 phone numbers

Numbers 571-600-0000 to 571-600-9999 are assigned to Terra Nova Telecom Inc. (rate centre DULLESMTRO, VA, NANPA abbreviation). 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 571-600-0xxx, 571-600-7xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 571-600