← Area code 337
337-680 phone numbers
Numbers 337-680-0000 to 337-680-9999 are assigned to Level 3 Communications, LLC (rate centre STMARTINVL, LA, NANPA abbreviation). 8 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.