Area code 317 – Indiana
317 is one of the original area codes, in service across Indiana since 1947. All but a handful of its 786 number blocks are allocated (786 of 786), so it is effectively exhausted. AT&T is the largest holder with 50.0% of blocks, ahead of Verizon at 11.5%. It shares its geography with overlay codes 463, so local calls take all ten digits. 853 FTC complaints named a 317 caller ID in the 33 days to 30 October 2026, putting it 78th of 422 codes with five or more complaints.
Who holds 317 number blocks
Share of the 786 assigned NXX blocks (100% of the 786 possible), across 31 carriers. This is share of number blocks, not of subscribers.
- AT&T50%
- T-Mobile12%
- Verizon11.5%
- Lumen7.5%
- Windstream3.9%
- Other CLEC / VoIP3.1%
- Bandwidth2.8%
- Onvoy2.2%
- Spok1.9%
- American Messaging1.5%
- Brightspeed1.4%
- Comcast1.3%
- Frontier0.6%
- Charter0.1%
- Peerless0.1%
- TPx0.1%
Spam complaints naming 317
FTC Do Not Call complaints where the caller ID was a 317 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 317
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 37.
Timeline
- 1947 317 assigned in the original North American Numbering Plan.
More about 317
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 317
What state is area code 317?
Indiana. It covers the same area as 317/463.
Can I still get a 317 number?
Only from recycled stock. 786 of the 786 available blocks are already allocated, so new numbers in the area normally come from the overlay codes (317/463).
Is a call from 317 a scam?
Not by itself. 317 drew 853 FTC complaints in the 33 days to 30 October 2026, 78th 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 317 numbers?
AT&T holds the largest share of assigned number blocks at 50.0%. 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 317?
Yes – ten digits for local calls in 317, 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.