The original 1947 area code for all of Arizona, now serving core Phoenix as part of a three-code overlay (480/602/623) covering the Phoenix metropolitan area.
The essentialsNumbering data · NumberResearch · as of 2026-09-18
Place
Phoenix
Type
geographic
Status
in service
In service since
1947
Projected exhaust
2056 Q4
Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.
A · Where it is
Where 602 is
Central Maricopa County (Phoenix metropolitan area)..
Communities served wholly or partly by 602:
Phoenix
Since the 2023 overlay, 480/602/623 all serve the same Phoenix-metro geography; pre-2023 602 was limited to core Phoenix plus slivers of Tempe and Glendale.
B · Relationships
How it relates to other codes
The codes 602 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?
Spawned · 1995520TucsonRural/southern Arizona split off from statewide 602.
Overlay · 1999480East Valley (Mesa/Tempe/Scottsdale)Originally an East Valley split from 602; boundaries eliminated in 2023 to form an overlay.
Overlay · 1999623West Valley (Glendale/Peoria/Surprise)Originally a West Valley split from 602; boundaries eliminated in 2023 to form an overlay.
What's changing. Overlay: shares Phoenix-metro geography with 480 and 623 since September 12, 2023.
C · History
How 602 got here
1947
Assigned as one of the original 86 NANP area codes; sole area code for all of Arizona.
Source: Wikipedia
1995
Area code 520 split off, removing rural/southern Arizona from 602.
Source: Wikipedia
1999-03-01
Three-way split effective; 480 (East Valley) and 623 (West Valley) split from 602, leaving 602 for core Phoenix.
Source: Wikipedia
2023-09-12
480/602/623 boundaries eliminated and recombined into an overlay complex; ten-digit dialing mandatory.
Source: Wikipedia
D · Capacity
How full it is
Prefixes assigned
763
Prefixes available
37
Thousands-blocks assigned
2,661
Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).
Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.
North American Numbers