← Area code 279
279-253 phone numbers
Numbers 279-253-0000 to 279-253-9999 are assigned to T-Mobile USA, Inc. (rate centre RSVL MAIN, 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.