Area codes · +1
Area code 712
Area code 712 is centred on Sioux City, Iowa. We hold 4,046 allocated blocks for it across 244 rate centres, split 50% mobile, 35% landline and 16% VoIP.
The towns inside area code 712
Area code 712 is not a city code. It covers 244 separate rate centres — billing areas, each its own local calling zone. The largest of them are named in the table below.
That matters twice over. A call between two 712 numbers is not necessarily a local call, because they can sit in different rate centres. And a code this wide narrows a subscriber to a region rather than a town.
Iowa is split across 5 area codes — 515, 712, 641, 319, 563. By allocated blocks 712 is the second largest of them, holding 22% of the Iowa total.
Where 712 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Esthervl and Rockwellcy are 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 712 |
|---|---|---|
| Sioux City | 591 | 15% |
| Councilblf | 226 | 6% |
| Spencer | 71 | 2% |
| Carroll | 70 | 2% |
| Red Oak | 65 | 2% |
| Emmetsburg | 62 | 2% |
| Cherokee | 61 | 2% |
| Atlantic | 59 | 1% |
| Shenandoah | 53 | 1% |
| Glenwood | 51 | 1% |
| Le Mars | 50 | 1% |
| Storm Lake | 48 | 1% |
| Clarinda | 46 | 1% |
| Rockvalley | 44 | 1% |
| Onawa | 40 | 1% |
| Denison | 39 | 1% |
| Sheldon | 39 | 1% |
| Esthervl | 38 | 1% |
| Lake Park | 38 | 1% |
| Orangecity | 38 | 1% |
| Carterlake | 36 | 1% |
| Ida Grove | 35 | 1% |
| Mapleton | 35 | 1% |
| Rockwellcy | 35 | 1% |
220 further rate centres in 712 hold fewer blocks than these.
Carriers holding the most 712 blocks
Onvoy582 blocks
AT&T Wireless470 blocks
Verizon Wireless454 blocks
Qwest Corporation244 blocks
Windstream Iowa Communications, Inc. - North188 blocks
T-Mobile USA, Inc.135 blocks
The largest holder, Onvoy, has 14% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 712 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 712 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 712?
Area code 712 is centred on Sioux City, Iowa and spans 244 rate centres, so it covers a region rather than a town.
Is a 712 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 712 the split runs 50% mobile, 35% landline and 16% VoIP, so mobile is the most likely single answer.
Which carriers hold 712 numbers?
The largest holders are Onvoy, AT&T Wireless, Verizon Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 712 numbers are there?
The code holds 4,046 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 712 covers on the order of 4,046,000 possible numbers — most of which have never been issued to anyone.