435-604 phone numbers

Numbers 435-604-0000 to 435-604-9999 are assigned to Teleport Communications America, LLC in Park City, UT. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 435-604-2xxx, 435-604-4xxx, 435-604-6xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 435-604