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← Area code 520

520-357 phone numbers

Numbers 520-357-0000 to 520-357-9999 are assigned to Qwest Corporation in Hayden, AZ. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 520-357-3xxx, 520-357-5xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 520-357