423 Area Code
The 423 area code serves Athens, Chattanooga, Cleveland, Dayton, Greeneville in United States. Learn the cities and counties covered, the time zone, dialing format, and how to get a local 423 business number.
Cities & regions in the 423 area code (7)
Frequently asked questions
What area code is 423?+
423 is a North American Numbering Plan (NANP) area code in United States, primarily covering Athens, Chattanooga, Cleveland, Dayton, Greeneville.
Where is the 423 area code located?+
The 423 area code is located in United States. It operates on Eastern Time (ET).
How do you dial the 423 area code from abroad?+
Dial your country's international exit code, then +1 423 followed by the 7-digit local number. From inside the US/Canada, dial 1 423 XXX-XXXX.
Can I get a 423 phone number for my business?+
Yes. AstraQom provisions local 423 DID numbers for SIP trunking, hosted PBX, contact centers and toll-free porting — usually within minutes, with no long-term contract.
Get a local 423 number for your business
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AstraQom is an independent global telecom carrier serving 117 countries. We provision local 423 DID numbers, SIP trunks, hosted PBX, contact-center routing and SD-WAN — all on Tier-1 carrier infrastructure with no grey termination and 24/7 multilingual support.