Canadial Know Who Called
← Area code 310

310-391 phone numbers

Numbers 310-391-0000 to 310-391-9999 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 310-391