435-856 phone numbers

Numbers 435-856-0000 to 435-856-9999 are assigned to Level 3 Communications, LLC in Nephi, UT. 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 435-856-8xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 435-856