337-423 phone numbers

Numbers 337-423-0000 to 337-423-9999 are assigned to Level 3 Communications, LLC in Leesville, LA. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 337-423-7xxx, 337-423-8xxx, 337-423-9xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 337-423