Canadial Know Who Called
← Area code 623

623-209 phone numbers

Numbers 623-209-0000 to 623-209-9999 are assigned to Allstream in Phoenix, AZ. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

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

Reported numbers in 623-209