Area code 931 – Tennessee
931 has served Tennessee since 1997, split from 615. 538 of its 786 number blocks are allocated (68%). No carrier dominates: AT&T 25.7%, Other CLEC / VoIP 22.5%, Verizon 13.9%. FTC complaints naming a 931 caller ID totalled 654 in the 33 days to 30 October 2026 (157th of 422 ranked codes).
- State
- Tennessee
- In service since
- 1997
- Time zone
- Eastern, Central
- Shares area with
- No overlay
Who holds 931 number blocks
Share of the 538 assigned NXX blocks (68.4% of the 786 possible), across 42 carriers. This is share of number blocks, not of subscribers.
- AT&T25.7%
- Other CLEC / VoIP18.2%
- Verizon13.9%
- T-Mobile9.1%
- Lumen8.9%
- Charter6.9%
- Onvoy6.1%
- Windstream4.8%
- Frontier3.5%
- Telnyx0.9%
- Bandwidth0.9%
- Comcast0.6%
- Spok0.2%
- Dish0.2%
Spam complaints naming 931
FTC Do Not Call complaints where the caller ID was a 931 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 931
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 100.
Timeline
- 1997 931 goes into service, split from or overlaid on 615.
More about 931
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 931
What state is area code 931?
Tennessee.
Is a call from 931 a scam?
Not by itself. 931 drew 654 FTC complaints in the 33 days to 30 October 2026, 157th 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 931 numbers?
AT&T holds the largest share of assigned number blocks at 25.7%. 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 931?
No. NANPA records 931 as 7-digit dialing for local calls.
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: “7D”. Reviewed by the data desk. Spotted an error? Request a correction.