North American Numbers Source-cited · ownership disclosed
Area code
531
In service
United States · since 2011

Eastern Nebraska (overlay of 402)

All-services overlay of area code 402 covering eastern Nebraska including Omaha and Lincoln. Added in 2011 to relieve number exhaustion.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Eastern Nebraska (overlay of 402)
Type
geographic
Status
in service
In service since
2011
Projected exhaust
2040 Q1

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 531 is

Same geography as 402: eastern Nebraska including the Omaha and Lincoln metros..

Communities served wholly or partly by 531:

OmahaLincolnBellevueFremontNorfolkColumbus

Overlay shares 402's footprint.

B · Relationships

How it relates to other codes

The codes 531 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 · 2011 402 Omaha / Lincoln / eastern Nebraska 531 overlays 402 across the same eastern-Nebraska service area.
What's changing. Overlay of 402 (same geography); ten-digit dialing required.
C · History

How 531 got here

2011-03
Added as an overlay of 402 to address number exhaustion in eastern Nebraska.
Source: Wikipedia
2013
First central office prefix in 531 assigned.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
283
Prefixes available
517
Thousands-blocks assigned
2,026

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

Compare 531 with another code →
Sources
Wikipedia ↗
Area code 531
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.