424-528 phone numbers

Numbers 424-528-0000 to 424-528-9999 are assigned to Teleport Communications America, LLC (rate centre CMTN GRDN, CA, NANPA abbreviation). 9 of its ten thousand-number blocks are assigned to other carriers (number pooling).

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

Reported numbers in 424-528