Area Code 423
423 area code is being used for dialing/telecommunication purposes in Tennessee, covering 7 major cities and 8 counties, according to (NANP) North American Numbering Plan for 3-digit Numbering Plan Area (NPA) code. All the areas using NPA code 423 is part of EST and CST timezone.
423 Area Code Covers 7 Cities
Check this below table to know 7 major cities (having more than 20,000 population) in Tennessee using numbering plan area code 423 for dialing/telecommunication purposes.
| City | ZIP Codes | Population |
|---|---|---|
| Bristol, TN | 1 | 27,307 |
| Chattanooga, TN | 20 | 181,288 |
| Cleveland, TN | 5 | 47,725 |
| Johnson City, TN | 5 | 70,720 |
| Kingsport, TN | 6 | 55,415 |
| Morris city, TN | 4 | 30,574 |
8 Counties Using 423 as Area Code
423 area code is being used in 8 counties of Tennessee for dialing/telecommunication purposes.
- Bradley County, TN
- Carter County, TN
- Hamblen County, TN
- Hamilton County, TN
- Hawkins County, TN
- Jefferson County, TN
- Sullivan County, TN
- Washington County, TN
56 More NPA Codes Related to Area Code 423
1 or more of these 56 NPA codes are being used in the same or adjacent states of Tennessee in the United States.
- 205 Area Code
- 228 Area Code
- 229 Area Code
- 251 Area Code
- 252 Area Code
- 256 Area Code
- 270 Area Code
- 276 Area Code
- 314 Area Code
- 334 Area Code
- 336 Area Code
- 364 Area Code
- 404 Area Code
- 417 Area Code
- 434 Area Code
- 470 Area Code
- 478 Area Code
- 479 Area Code
- 501 Area Code
- 502 Area Code
- 540 Area Code
- 571 Area Code
- 573 Area Code
- 601 Area Code
- 606 Area Code
- 615 Area Code
- 629 Area Code
- 636 Area Code
- 659 Area Code
- 660 Area Code
- 662 Area Code
- 678 Area Code
- 703 Area Code
- 704 Area Code
- 706 Area Code
- 731 Area Code
- 743 Area Code
- 757 Area Code
- 762 Area Code
- 769 Area Code
- 770 Area Code
- 785 Area Code
- 804 Area Code
- 816 Area Code
- 828 Area Code
- 859 Area Code
- 865 Area Code
- 870 Area Code
- 901 Area Code
- 910 Area Code
- 912 Area Code
- 919 Area Code
- 931 Area Code
- 938 Area Code
- 980 Area Code
- 984 Area Code