Area code 931: Tennessee
Area code 931 is a US state area code for Tennessee, on Eastern Time and Central Time. It has 535 prefixes in service across 100 rate centers, the largest being Clarksville, Cookeville and Columbia. NANPA lists no overlay code for it. Local calls there take 7 digits.
Local time in area code 931
America/New_York
America/Chicago
Prefixes in service
535 of 792 possible
100 rate centers
Area code 931 facts
| Location | Tennessee, United States |
|---|---|
| Time zones | Eastern Time and Central Time |
| Overlays | None |
| Split from | 615 |
| In service since | September 15, 1997 |
| Local calls | 7 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 931?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 931 rate centers with the most prefixes in service. 88 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Clarksville | 70 |
| Cookeville | 35 |
| Columbia | 31 |
| Shelbyville | 22 |
| Crossville | 17 |
| Tullahoma | 17 |
| Winchester | 15 |
| Lawrenceburg | 13 |
| Mcminnville | 13 |
| Baxter | 12 |
| Pulaski | 11 |
| Fayetteville | 11 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 931 number?
NANPA's dialling plan for 931: local calls inside the code take 7 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 931 | 555-0147 |
|---|---|
| From another US or Canadian area code | 1-931-555-0147 |
| From outside North America | +1 931 555 0147 |
| E.164, for CRMs and SMS tools | +19315550147 |
When did area code 931 start?
Area code 931 went into service on September 15, 1997, split from 615. It has no overlay, so every number in its area still starts with it.
Tools for 931 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 931 number tells you where it was issued, not what it is now.
Mobiles, landlines and VoIP lines share area codes, and numbers move between carriers. A live line-type and carrier lookup on every number in your list says which is which, and that decides which calling and texting rules apply. It's in the Email + Phone plan.
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Area code 931 questions
- What state is area code 931?
- Area code 931 is in Tennessee, United States. Its largest rate centers by number of prefixes are Clarksville, Cookeville, Columbia, Shelbyville and Crossville.
- What time zone is area code 931 in?
- Eastern Time and Central Time. The code crosses a time zone line, so the local time depends on where in the area the number was issued.
- Does area code 931 have an overlay?
- Not as of NANPA's file dated 10/16/2026. Every number in its area uses 931.
- When did area code 931 start?
- Area code 931 went into service on September 15, 1997, split from 615.
- Is a 931 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 931 have?
- 535 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Tennessee
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.