← Area code 350
350-255 phone numbers
Numbers 350-255-0000 to 350-255-9999 are assigned to Onvoy, LLC in Manteca, CA. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 350-255-2xxx, 350-255-3xxx, 350-255-4xxx, 350-255-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.