← Area code 737
737-331 phone numbers
Numbers 737-331-0000 to 737-331-9999 are assigned to Bandwidth.com CLEC, LLC (rate centre DALE/LTNSP, TX, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 737-331-3xxx, 737-331-4xxx, 737-331-5xxx, 737-331-6xxx, 737-331-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.