Area codes · +1
Area code 531
Area code 531 is centred on Omaha, Nebraska. We hold 2,312 allocated blocks for it across 104 rate centres, split 45% mobile, 29% landline and 26% VoIP.
The other area codes laid over 531
Area code 531 does not have Omaha to itself. 1 other code — 402 — serves the same rate centres, laid over the same ground rather than dividing it. That is an overlay: a new code added when the old one ran out of numbers, covering the same streets. Two neighbours can hold different area codes, so the code says roughly when a number was issued rather than where it sits.
4025,795 blocks, 281 rate centres, mostly landline
Each holds its own blocks and its own carrier mix, so a 531 number and a 402 number from the same street can report different line types. Filtering Omaha by area code needs all 2 of them.
531 is not confined to Omaha itself: its blocks sit across 104 rate centres, named in the table below.
Nebraska is split across 3 area codes — 402, 531, 308. By allocated blocks 531 is the second largest of them, holding 22% of the Nebraska total.
Where 531 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Sosioux Cy is shortened. Names are reproduced as recorded rather than expanded — the abbreviation is the key the block data is filed under.
| Rate centre | Blocks | Share of 531 |
|---|---|---|
| Omaha | 895 | 39% |
| Lincoln | 267 | 12% |
| Aurora | 95 | 4% |
| Fremont | 50 | 2% |
| Columbus | 44 | 2% |
| Sosioux Cy | 35 | 2% |
| Oakland | 28 | 1% |
| Ainsworth | 27 | 1% |
| Creston | 27 | 1% |
| Schuyler | 27 | 1% |
| Norfolk | 26 | 1% |
| Wayne | 26 | 1% |
| Howells | 25 | 1% |
| Plattsmth | 25 | 1% |
| Valentine | 25 | 1% |
| West Point | 23 | 1% |
| O Neill | 22 | 1% |
| Auburn | 21 | 1% |
| Atkinson | 20 | 1% |
| Pender | 19 | 1% |
| Beatrice | 18 | 1% |
| Hastings | 18 | 1% |
| Clarkson | 17 | 1% |
| Madison | 17 | 1% |
80 further rate centres in 531 hold fewer blocks than these.
Carriers holding the most 531 blocks
Onvoy496 blocks
Verizon Wireless290 blocks
Teleport Communications America, Llc193 blocks
AT&T Wireless169 blocks
United States Cellular124 blocks
Aerial Communications, Inc.114 blocks
The largest holder, Onvoy, has 21% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 531 number still reports the carrier it started with. Closing that gap needs a live query against the routing database. How line type is derived.
Check a single 531 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 531?
Area code 531 covers Omaha, Nebraska. It is not the only code there: 402 is an overlay on the same rate centres, so a Omaha, Nebraska number can start with any of them.
Is a 531 number a mobile or a landline?
It can be either, and the digits do not say which. North American mobile and landline numbers share the same ranges, so the answer comes from the carrier holding the block. In 531 the split runs 45% mobile, 29% landline and 26% VoIP, so mobile is the most likely single answer.
Which carriers hold 531 numbers?
The largest holders are Onvoy, Verizon Wireless, Teleport Communications America, Llc. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 531 numbers are there?
The code holds 2,312 allocated blocks in our copy of the numbering plan. A block is 1,000 or 10,000 consecutive numbers depending on how deeply it has been pooled, so 531 covers on the order of 2,312,000 possible numbers — most of which have never been issued to anyone.