Area codes · +1
Area code 517
Area code 517 is centred on Lansing, Michigan. We hold 4,336 allocated blocks for it across 78 rate centres, split 41% mobile, 47% landline and 12% VoIP.
The towns inside area code 517
Area code 517 is not a city code. It covers 78 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 517 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.
Michigan is split across 12 area codes — 313, 248, 734, 989, 517, 586 and others. By allocated blocks 517 is the 5th largest of them, holding 9% of the Michigan total.
Where 517 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Fowlervl and Eaton Rpd 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 517 |
|---|---|---|
| Lansing | 1,032 | 24% |
| Jackson | 486 | 11% |
| Howell | 209 | 5% |
| Adrian | 207 | 5% |
| Holt | 133 | 3% |
| Dimondale | 131 | 3% |
| Charlotte | 115 | 3% |
| Coldwater | 87 | 2% |
| Hillsdale | 87 | 2% |
| Mason | 85 | 2% |
| Fowlervl | 80 | 2% |
| Grandledge | 72 | 2% |
| Albion | 63 | 1% |
| Dansville | 62 | 1% |
| Portland | 59 | 1% |
| Eaton Rpd | 54 | 1% |
| Leslie | 47 | 1% |
| Pottervl | 45 | 1% |
| Sunfield | 43 | 1% |
| Tecumseh | 42 | 1% |
| Hudson | 41 | 1% |
| Addison | 38 | 1% |
| Onsted | 38 | 1% |
| Nashville | 36 | 1% |
54 further rate centres in 517 hold fewer blocks than these.
Carriers holding the most 517 blocks
Onvoy550 blocks
Verizon Wireless437 blocks
AT&T Wireless370 blocks
Omnipoint Communications Midwest Operations, Llc336 blocks
T-Mobile USA, Inc.293 blocks
Michigan Bell Tel Co267 blocks
The largest holder, Onvoy, has 13% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 517 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 517 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 517?
Area code 517 is centred on Lansing, Michigan and spans 78 rate centres, so it covers a region rather than a town.
Is a 517 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 517 the split runs 41% mobile, 47% landline and 12% VoIP, so landline is the most likely single answer.
Which carriers hold 517 numbers?
The largest holders are Onvoy, Verizon Wireless, AT&T Wireless. That is the carrier the block was allocated to, which is not necessarily the network a given number sits on today.
How many 517 numbers are there?
The code holds 4,336 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 517 covers on the order of 4,336,000 possible numbers — most of which have never been issued to anyone.