Area codes 423 and 729 Numbering plan area 423 (red), today overlaid with 729 since 2025 Area codes 423 and 729 are telephone area codes in the North American Numbering Plan (NANP) …

Browse area code 423 phone numbers, prefixes and exchanges. The 423 area code serves Chattanooga, Knoxville, Johnson City, Bristol, Kingsport, covering 86 ZIP codes in 30 counties.

About area code 423: location, common spam callers, related area codes, and more. Includes 423 reverse phone lookup to identify spam callers.

Dec 1, 2025 · 423 Area Code located in Tennessee, including 90 cities, 28 counties, 2 time zones, map, Census demographics, and 734 active prefixes.

423 Area code 423 is an area code located in the state of Tennessee, US. The largest city it serves is Chattanooga. Location, time zone and map of the 423 area code

Find 423 area code details including city, time zone, and map. Lookup area code 423 phone number, name, and location.

Area code 423 is located in Tennessee. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.

The 423 Area Code is located in the state of Tennessee. Area Code 423 is one of the 269 three-digit telephone area codes in the USA. It covers roughly 7,499,682 unique phone numbers …

Area code 423 was put into service on September 11, 1995, and was created from a split of area code 615. Area code 423 was split to form area code 865 on October 1, 1999. Chattanooga is …

We've have collected info regarding the area code 423 in this page, which helps with a phone number search. Here, you'll find the location, time zone, cities and other information regarding …