865 Area Code — Knoxville, TN
Area code 865 serves Knoxville and 3 other cities in Tennessee. Local time follows America/New_York. It has no overlay codes.
- State
- Tennessee
- Primary city
- Knoxville
- Timezone
- America/New_York
- In service since
- 1999
- Type
- Geographic
- Overlay codes
- None
Cities Served by 865
The 865 area code covers 4 cities and communities in Tennessee.
- Knoxville
- Maryville
- Oak Ridge
- Sevierville
About Area Code 865
Area code 865 is a North American Numbering Plan (NANP) area code that has been in service since 1999. It is administered by NANPA on behalf of the FCC and serves the Tennessee region anchored on Knoxville.
865 is currently a single-coverage geographic area code with no overlays. This means a 7-digit number in this area code is unique within its rate centers, though best-practice is always to dial the full 10-digit number when contacting a 865 line.
Mobile numbers in 865 are portable: a person who moved away from Knoxville may still carry a 865 mobile number on their device. If you receive an unexpected call from a 865 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Tennessee, you may also interact with neighbouring or overlay codes. See the related codes section below to explore the rest of Tennessee.
Other Tennessee Area Codes
Continue exploring the Tennessee numbering plan.
865 Area Code FAQ
Where is area code 865?
Area code 865 is located in Tennessee, primarily serving Knoxville and surrounding cities including Maryville, Oak Ridge, Sevierville. The region operates on ET (America/New_York) time.
What state is 865 area code?
865 is a Tennessee area code. It was put into service in 1999 and has no overlay codes — it covers its geographic area exclusively.
Is 865 a scam area code?
865 is a legitimate North American area code allocated by NANPA to Tennessee. Like any geographic area code, scammers sometimes spoof 865 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 865 use?
Area code 865 operates on ET (America/New_York). Numbers in this area code follow standard Tennessee time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 865 phone number?
Yes. Use the reverse lookup widget above to enter a full 865 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.