Arizona · Mountain Time
Mesa, AZ Area Codes
Mesa is served by 3 area codes (480, 602, 623). Here's which is original, which are overlays, and how to pick one for a new local number.
Last updated October 3, 2026 · Source: NANPA
Area codes serving Mesa
Mesa sits in Arizona, part of the West region and the Mountain Time zone. Its numbers are spread across an overlay of 3 codes that all cover the same ground: 480, 602, 623.
The original code is 602 (in service since 1947). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.
| Code | Area served | In service |
|---|---|---|
| 480 | Phoenix and the greater Phoenix metro area (Valley of the Sun) in central Arizona | March 1, 1999 |
| 602 | Phoenix and the greater Phoenix metro area (Valley of the Sun) in central Arizona | January 1, 1947 |
| 623 | Phoenix and the greater Phoenix metro area (Valley of the Sun) in central Arizona | March 1, 1999 |
Nearby cities sharing these area codes
- Phoenix
- Chandler
- Glendale
- Scottsdale
- Gilbert
- Tempe
- Peoria
- Surprise
- Avondale
- Goodyear
- Buckeye
- Queen Creek
- Apache Junction
How to pick an area code for a new number
When you activate a new line in Mesa, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 602), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.
Dialing in Mesa
Because Mesa is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. From outside the US, dial +1, then the area code and number. See 10-digit dialing and overlay area codes for the background. For every code in Arizona, visit the Arizona area codes page.
Quick answers
Mesa area code FAQ
What area codes does Mesa use?
Mesa, AZ is served by 3 area codes: 480, 602, 623.
Which is the original Mesa area code?
602 is the original code for Mesa, in service since 1947; the others were added later for more numbers.
What time zone is Mesa in?
Mesa is in the Mountain Time zone.
Do I need to dial the area code in Mesa?
Yes. With multiple overlapping codes, 10-digit dialing is required for every call in this area.