Canadial Know Who Called
← Area code 310

310-390 phone numbers

Numbers 310-390-0000 to 310-390-9999 are assigned to Frontier California Inc. (rate centre SNMN MRVS, CA, NANPA abbreviation).

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

Reported numbers in 310-390