Area code 626 covers most of the San Gabriel Valley in eastern Los Angeles County, California, including Pasadena and its surrounding cities.
The essentialsNumbering data from NumberResearch · as of 2026-09-17
Place
San Gabriel Valley
Type
geographic
Status
in service
In service since
1997
Country
United States
Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records), as of 2026-09-17. Assignment records show initial assignees, not the carrier serving a number today.
Where 626 is
San Gabriel Valley, eastern Los Angeles County, California.
Communities served wholly or partly by 626:
PasadenaAlhambraArcadiaMonroviaEl MonteWest CovinaSan GabrielRosemeadBaldwin ParkGlendoraAzusaMonterey Park
Representative San Gabriel Valley communities; several cities sit only partly within 626 and per-city boundaries were not each verified against a NANPA rate-center list.
How it relates to other codes
The codes 626 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?
Split from · 1997818San Fernando Valley626 was created by a geographic split from 818 in June 1997, taking the eastern San Gabriel Valley while 818 kept the San Fernando Valley.
Related · 1984213Downtown & Central LAParent 818 was itself split from 213 in 1984, so 626's lineage traces back to the original Los Angeles 213.
History
1984
Area code 818 created by a geographic split from 213 (818 then also served the San Gabriel Valley).
Source: CPUC 818 Report (primary)
1997 (Jun)
The 818 area was geographically split and 626 was implemented, taking the San Gabriel Valley.
Source: CPUC 818 Report (primary)
2021-10-24
Mandatory 1+10-digit dialing took effect for 626, part of the nationwide transition required before the launch of 988. (The 988 Suicide & Crisis Lifeline code itself became operational nationally on July 16, 2022.)
Source: FCC — 988 / 10-digit dialing transition
2025-02-20
NANPA filed CPUC Application A.25-02-004 seeking an all-services overlay over the 626 territory.
Source: CPUC 626 page; Application A.25-02-004
What's changing. Proposed and pending — NANPA filed for an all-services overlay of 626 in February 2025 (CPUC Application A.25-02-004). As of this writing no CPUC decision has been issued, no overlay area code has been assigned, and none is in service. The 2025 application cited a then-current exhaust forecast of Q4 2027; the current forecast may differ (see the numbering data above), and forecasts can shift once a relief proceeding is under way.
How full it is
Prefixes assigned
748
Prefixes available
52
Projected exhaust
2030 Q1
Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.
Application A.25-02-004 for relief of the 626 NPA (filed Feb 20, 2025) — proposes an all-services overlay and cites a Q4 2027 exhaust forecast; pending, no code assigned
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-17 (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.