408-333 phone numbers

Numbers 408-333-0000 to 408-333-9999 are assigned to Level 3 Communications, LLC (rate centre SNJS SOUTH, 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.

Reported numbers in 408-333