Cities in area code 423
Which places use area code 423? 75 rate centers in Tennessee, the biggest being Chattanooga, Johnson City, Bristol. Data below is NANPA's official prefix-to-rate-center mapping.
By numbering footprint the leading localities are Chattanooga, Johnson City, Bristol, Cleveland, Kingsport, Morristown, Athens and Greeneville, and 66 smaller communities down to single-prefix localities. Prefix counts track lines in service, so the ranking is a reasonable proxy for where the code's subscribers actually are.
18 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.
All of the code's territory keeps Eastern or Central time — one of the rare NANP codes straddling a zone boundary, so check the locality before assuming the hour.
Remember that people keep numbers when they relocate, so a 423 number is a where-it-was-issued fact, not a where-they-are fact.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| Chattanooga | 183 | Chattanooga, TN-GA | 423 |
| Johnson City | 67 | — | 423 |
| Bristol | 35 | — | 423 |
| Cleveland | 32 | — | 423 |
| Kingsport | 31 | — | 423 |
| Morristown | 28 | — | 423 |
| Athens | 22 | — | 423 |
| Greeneville | 20 | — | 423 |
| La Follette | 16 | Knoxville, TN | 423 |
| Newport | 15 | — | 423 |
| Elizabethton | 13 | — | 423 |
| Midway (sullivan) | 12 | — | 423 |
| Rogersville | 12 | — | 423 |
| Blountville | 10 | — | 423 |
| Benton | 9 | — | 423 |
| Charleston | 9 | — | 423 |
| Bulls Gap | 9 | — | 423 |
| Sweetwater | 9 | — | 423 |
| Erwin | 8 | — | 423 |
| Soddy Daisy | 8 | Chattanooga, TN-GA | 423 |
| Dayton | 8 | — | 423 |
| Madisonville | 8 | — | 423 |
| Oneida | 7 | Knoxville, TN | 423 |
| South Pittsburg | 7 | Chattanooga, TN-GA | 423 |
| Limestone | 7 | — | 423 |
| Sneedville | 7 | — | 423 |
| Pikeville | 6 | — | 423 |
| New Tazewell | 6 | — | 423 |
| Mountain City | 6 | — | 423 |
| Fall Branch | 6 | — | 423 |
| Etowah | 5 | — | 423 |
| Midway (washington) | 5 | — | 423 |
| Englewood | 5 | — | 423 |
| Copper Basin | 5 | — | 423 |
| Butler | 5 | — | 423 |
| Spring City | 5 | — | 423 |
| Jellico | 5 | Knoxville, TN | 423 |
| Bluff City | 5 | — | 423 |
| Cumberland Gap | 5 | — | 423 |
| Tellico Plains | 4 | — | 423 |
| Church Hill | 4 | — | 423 |
| Decatur | 4 | — | 423 |
| Surgoinsville | 4 | — | 423 |
| Sullivan Gardens | 4 | — | 423 |
| Mosheim | 4 | — | 423 |
| Georgetown | 4 | Chattanooga, TN-GA | 423 |
| Jasper | 4 | Chattanooga, TN-GA | 423 |
| Jonesboro | 4 | — | 423 |
| Baileyton | 3 | — | 423 |
| Ooltewah | 3 | Chattanooga, TN-GA | 423 |
| Fork Ridge | 3 | — | 423 |
| Vonore | 3 | — | 423 |
| Huntsville | 3 | — | 423 |
| Collegedale | 3 | Chattanooga, TN-GA | 423 |
| Stoney Creek | 3 | — | 423 |
| Roan Mountain | 3 | — | 423 |
| Whitwell | 3 | Chattanooga, TN-GA | 423 |
| Hampton | 3 | — | 423 |
| Apison | 2 | Chattanooga, TN-GA | 423 |
| Coker Creek | 2 | — | 423 |
| Ball Play | 2 | — | 423 |
| Wartburg | 2 | Knoxville, TN | 423 |
| Oakdale | 2 | Knoxville, TN | 423 |
| Riceville | 2 | — | 423 |
| College Station | 2 | — | 423 |
| Niota | 2 | — | 423 |
| Robbins | 2 | — | 423 |
| Sunbright | 2 | Knoxville, TN | 423 |
| Fall Creek Falls | 2 | — | 423 |
| Clinchport | 2 | — | 423 |
| Dunlap | 2 | Chattanooga, TN-GA | 423 |
| Deer Lodge | 2 | Knoxville, TN | 423 |
| Petros | 1 | Knoxville, TN | 423 |
| Nine Mile | 1 | — | 423 |
| Shady Valley | 1 | — | 423 |
FAQ
What is the biggest city in area code 423?
Chattanooga holds the most active prefixes (183), making it the code's largest numbering locality.
How many places does 423 cover?
75 rate centers in Tennessee hold active 423 prefixes, from Chattanooga down to communities with a single prefix.
Does a 423 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.