North American Numbers Source-cited · ownership disclosed
Area code
837
In service
United States · since 2025

Redding (overlay)

Area code 837 is an all-services overlay of area code 530, serving northeastern and northern California. It went into service on January 31, 2025 (re-check against NANPA).

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Redding (overlay)
Type
geographic
Status
in service
In service since
2025
Projected exhaust
2092 Q3

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 837 is

Northeastern and northern California across roughly 20 counties (identical footprint to 530)..

Communities served wholly or partly by 837:

ReddingChicoDavisWoodlandTruckeeSouth Lake Tahoe

Identical service area to 530.

B · Relationships

How it relates to other codes

The codes 837 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 · 2025 530 Redding 837 overlays the same geography as parent code 530.
What's changing. Overlay of 530 in service since January 31, 2025; ten-digit dialing already established (re-check against NANPA).
C · History

How 837 got here

2023-06-08
CPUC assigned area code 837 to overlay 530.
Source: Wikipedia
2025-01-31
Area code 837 went into service as an all-services overlay of 530.
Source: CPUC news release + Wikipedia
D · Capacity

How full it is

Prefixes assigned
22
Prefixes available
778
Thousands-blocks assigned
12

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

Compare 837 with another code →
Sources
Wikipedia ↗
Area codes 530 and 837
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.