Arizona area codes — detailed data

NANPA NPA database, current as of July 28, 2026.

Working detail for Arizona's 5 area codes: history, capacity forecasts and dialing plans, straight from NANPA's NPA database.

Aggregate footprint: the state's 5 geographic codes currently carry 3,157 active NXX prefixes over 134 rate-center anchorings, with 2,102 prefixes in thousands-block pooling. 5 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 480 came out of 602 in 1999; 520 came out of 602 in 1995; 623 came out of 602 in 1999; 928 came out of 520 in 2001. The remaining code (602) dates back to the plan's early assignments.

Dialing plans: 5 codes use plain ten-digit local dialing (10D). Overlay territories always dial ten digits; the 2021 988-hotline transition moved most others to ten digits as well.

The tightest capacity in the state is 520, projected to exhaust 3Q 2031.

Status: no Arizona code is currently in jeopardy or active relief planning — capacity is adequate near-term per NANPA.

Code-by-code notes

480 — carved from 602; overlaid by 602/623; exhaust forecast 4Q 2056.

602 — spawned 520, 480, 623; overlaid by 480/623; exhaust forecast 4Q 2056.

520 — spawned 928; carved from 602; exhaust forecast 3Q 2031.

928 — carved from 520; exhaust forecast 3Q 2034.

623 — carved from 602; overlaid by 480/602; exhaust forecast 4Q 2056.