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← Area code 813

813-423 phone numbers

Numbers 813-423-0000 to 813-423-9999 are assigned to Ymax Communications Corp. (rate centre TAMPAEST, FL, NANPA abbreviation). 2 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 813-423