North American Numbers Source-cited · ownership disclosed
Area code
657
In service
United States · since 2008

Anaheim / North Orange County (overlay)

Area code 657 is an all-services overlay of area code 714, serving northern Orange County, California. It went into service on September 23, 2008.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Anaheim / North Orange County (overlay)
Type
geographic
Status
in service
In service since
2008
Projected exhaust
2028 Q2

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 657 is

Northern Orange County, California, plus small portions of Los Angeles County and the Chino Hills area of San Bernardino County (same as 714)..

Communities served wholly or partly by 657:

AnaheimSanta AnaHuntington BeachGarden GroveFullertonBuena Park

Serves the same territory as 714; representative list.

B · Relationships

How it relates to other codes

The codes 657 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?

Overlay · 2008 714 Northern Orange County 657 was overlaid onto the entire 714 territory on September 23, 2008.
What's changing. All-services overlay of area code 714 since September 23, 2008; ten-digit dialing is mandatory.
C · History

How 657 got here

2008-09-23
Area code 657 overlaid onto the 714 numbering plan area to relieve number exhaustion; ten-digit dialing required.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
708
Prefixes available
92
Thousands-blocks assigned
6,900

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 657 with another code →
Sources
Wikipedia ↗
Area codes 714 and 657
NumberResearch.org ↗
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.