Area code 531 – Nebraska
531 has served Nebraska since 2011, split from 402. 267 of its 786 number blocks are allocated (34%). No carrier dominates: Other CLEC / VoIP 25.5%, Onvoy / Inteliquent 24.0%, AT&T 16.5%. It shares its geography with overlay codes 402, so local calls take all ten digits. Spam complaints are comparatively rare: 224 in the 33 days to 30 October 2026, 329th of the 422 codes with five or more complaints.
Who holds 531 number blocks
Share of the 267 assigned NXX blocks (34% of the 786 possible), across 40 carriers. This is share of number blocks, not of subscribers.
- Onvoy24%
- Other CLEC / VoIP21.7%
- AT&T16.5%
- Verizon10.9%
- T-Mobile10.1%
- Lumen5.2%
- Bandwidth2.6%
- Charter2.6%
- Comcast2.2%
- Telnyx1.5%
- Dish1.1%
- Vonage0.7%
- Twilio0.7%
Spam complaints naming 531
FTC Do Not Call complaints where the caller ID was a 531 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.
Rate centers in 531
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 105.
Timeline
- 2011 531 goes into service, split from or overlaid on 402.
More about 531
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 531
What state is area code 531?
Nebraska. It covers the same area as 402/531.
Is a call from 531 a scam?
Not by itself. 531 drew 224 FTC complaints in the 33 days to 30 October 2026, 329th of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.
Which carrier owns 531 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 25.5%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 531?
Yes – ten digits for local calls in 531, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.