Area codes · +1
Area code 317
Area code 317 is centred on Indianapolis. We hold 5,657 allocated blocks for it across 37 rate centres, split 40% mobile, 52% landline and 8% VoIP.
The other area codes laid over 317
Area code 317 does not have Indianapolis to itself. 1 other code — 463 — 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.
4631,942 blocks, 32 rate centres, mostly mobile
Each holds its own blocks and its own carrier mix, so a 317 number and a 463 number from the same street can report different line types. Filtering Indianapolis by area code needs all 2 of them.
317 is not confined to Indianapolis itself: its blocks sit across 37 rate centres, named in the table below.
Indiana is split across 8 area codes — 812, 317, 765, 219, 260, 574 and others. By allocated blocks 317 is the second largest of them, holding 18% of the Indiana total.
Where 317 numbers are concentrated
NANPA truncates rate-centre names to ten characters and drops the spaces, which is why Noblesvl and Shelbyvl 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 317 |
|---|---|---|
| Indianapls | 3,429 | 61% |
| Carmel | 293 | 5% |
| Fishers | 233 | 4% |
| Greenwood | 162 | 3% |
| Noblesvl | 146 | 3% |
| Greenfield | 124 | 2% |
| Plainfield | 113 | 2% |
| Franklin | 102 | 2% |
| Shelbyvl | 101 | 2% |
| Cicero | 66 | 1% |
| Danville | 64 | 1% |
| Fairland | 64 | 1% |
| Zionsville | 63 | 1% |
| Cumberland | 57 | 1% |
| Westfield | 57 | 1% |
| Brownsburg | 56 | 1% |
| Westnewton | 55 | 1% |
| Mooresvl | 54 | 1% |
| Oaklandon | 46 | 1% |
| Acton | 45 | 1% |
| Newpalstin | 43 | 1% |
| Fortville | 34 | 1% |
| Charlotsvl | 33 | 1% |
| Whiteland | 32 | 1% |
13 further rate centres in 317 hold fewer blocks than these.
Carriers holding the most 317 blocks
Indiana Bell Tel Co Inc1,022 blocks
Omnipoint Communications Midwest Operations, Llc600 blocks
Verizon Wireless484 blocks
T-Mobile USA, Inc.453 blocks
AT&T Wireless448 blocks
Bandwidth350 blocks
The largest holder, Indiana Bell Tel Co Inc, has 18% of the code.
These are original allocations. A number keeps its digits and its block when its subscriber moves network, so a ported 317 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 317 number, or run a whole list through the free cleaner — neither uploads anything.
Common questions
Where is area code 317?
Area code 317 covers Indianapolis. It is not the only code there: 463 is an overlay on the same rate centres, so a Indianapolis number can start with any of them.
Is a 317 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 317 the split runs 40% mobile, 52% landline and 8% VoIP, so landline is the most likely single answer.
Which carriers hold 317 numbers?
The largest holders are Indiana Bell Tel Co Inc, Omnipoint Communications Midwest Operations, Llc, 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 317 numbers are there?
The code holds 5,657 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 317 covers on the order of 5,657,000 possible numbers — most of which have never been issued to anyone.