475-383 phone numbers

Numbers 475-383-0000 to 475-383-9999 are assigned to Onvoy, LLC in Greenwich, CT. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 475-383-6xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 475-383