707-574 phone numbers

Numbers 707-574-0000 to 707-574-9999 are assigned to Frontier California Inc. in Mad River, CA. 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 707-574-0xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 707-574