331-850 phone numbers

Numbers 331-850-0000 to 331-850-9999 are assigned to Onvoy, LLC in Big Rock, IL. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 331-850-0xxx, 331-850-2xxx, 331-850-4xxx, 331-850-6xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 331-850