← Area code 956
956-243 phone numbers
Numbers 956-243-0000 to 956-243-9999 are assigned to AT&T - Local (rate centre BROWNSVL, TX, 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.