Nestled in the Tennessee Valley at the gateway to the Great Smoky Mountains, Knoxville is home to the University of Tennessee and the landmark Sunsphere from the 1982 World’s Fair. The region sits under a single area code, 865, which keeps local dialing simple. This guide covers the 865 area code, its coverage across Knox County, dialing rules, the Eastern-time distinction, major ZIP codes, and local scam warnings.
Knoxville Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 865 |
| Overlay Area Code(s) | None (865 only) |
| Time Zone | Eastern Time (ET) – EST / EDT |
| Major County | Knox County |
| Region | East Tennessee |
| Dialing Format | 7 or 10-digit dialing |
Area Code Breakdown & Regional Mapping
865 – Knoxville & East TN Code
Area code 865 was created in 1999 when it split from 423, serving the Knoxville metro and much of East Tennessee including Knox, Blount, and Sevier counties. It covers Knoxville as a single, non-overlaid area code.
Neighborhoods & Local Coverage
Knoxville’s 865 code covers a revitalizing city centered on Market Square and Gay Street downtown, where restored theaters and a lively dining scene anchor the core. The nearby Old City district and the Fort Sanders neighborhood around the University of Tennessee campus give the city its collegiate energy.
Beyond downtown, the same code reaches the trendy Bearden and Sequoyah Hills areas along Kingston Pike, the historic Fourth & Gill neighborhood, and South Knoxville across the Tennessee River near the Urban Wilderness trails. The 865 code ties Knoxville to the surrounding Smoky Mountains gateway communities.
Local Dialing Rules, Time Zone & International Format
Because 865 is a single area code with no overlay, Knoxville still permits 7-digit dialing for local calls, though 10-digit dialing (area code + number) always works. Chattanooga and the Tri-Cities to the south and northeast use 423.
A note on Tennessee time: Knoxville sits in the Eastern Time Zone, unlike Nashville and Memphis to the west, which are on Central Time. East Tennessee — including Knoxville, Chattanooga, and the Tri-Cities — runs an hour ahead of the rest of the state.
To call Knoxville from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 865 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 865 service area spans many of Knoxville’s core ZIP codes, including 37902, 37909, 37912, 37914, 37916, 37917, 37918, 37919, and 37920.
Spam & Scam Call Warnings in Knoxville
Knoxville residents report spoofed 865 robocalls impersonating utilities like KUB (Knoxville Utilities Board), the IRS, and delivery services. Student-targeted scams around the University of Tennessee are also common.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 865 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Government | Robocalls claiming legal action — agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Tennessee Cities
Frequently Asked Questions
What area code is Knoxville, TN?
Knoxville uses area code 865, which covers Knox County and the surrounding East Tennessee region.
What time zone is Knoxville in?
Knoxville is in the Eastern Time Zone (EST/EDT), unlike Nashville and Memphis, which are on Central Time. East Tennessee runs an hour ahead of the rest of the state.
Do I have to dial 10 digits in Knoxville?
Not necessarily. Because 865 has no overlay, 7-digit local dialing still works, but 10-digit dialing is always accepted.
Does 865 cover the Smoky Mountains area?
Yes. 865 serves Knoxville along with the Smoky Mountains gateway towns of Sevierville, Pigeon Forge, and Gatlinburg in Sevier County.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.