Everything you need to know about area code 423 in Tennessee
QUICK FACTS
Tennessee
Eastern Time Zone
Split from existing code
Estimated residents served
Tennessee
Primary code for this region
ABOUT THIS AREA CODE
Area code 423 serves eastern Tennessee including Chattanooga, Johnson City, and the Tri-Cities region. It covers the scenic Tennessee Valley and Great Smoky Mountains foothills.
Phone numbers with the 423 area code follow the format (423) XXX-XXXX, where the next three digits represent the local exchange. The 423 area code is part of the North American Numbering Plan (NANP) and is regulated by the Federal Communications Commission (FCC).
If you receive a call from a 423 number that you don't recognize, you can search it using the lookup tool above. While the 423 area code legitimately serves millions of residents and businesses in the Chattanooga area, scammers sometimes spoof local area codes to make their calls appear more trustworthy. Always verify unfamiliar numbers before returning calls or sharing personal information.
The Chattanooga region served by area code 423 is one of the most significant areas in Tennessee. As a primary geographic code, 423 has been the main identifier for this region since it was introduced in 1995.
For detailed information about any phone number in the 423 area code, including owner identification, carrier data, and spam reports, use our search tool above or visit one of our trusted lookup providers.
CITIES & COMMUNITIES
SPAM & SCAM ALERTS
These are frequently reported scam patterns from phone numbers using the 423 area code. Scammers often spoof area codes, so a call appearing to come from 423 may originate elsewhere.
Callers impersonate a grandchild in trouble, claiming to need bail money or emergency funds wired immediately.
Automated messages claim a package could not be delivered and direct you to a phishing website to reschedule delivery.
Callers offer fake student loan forgiveness programs, collecting personal and financial information under the pretense of reducing your debt.
Stay Safe: Never share personal information with incoming callers. If suspicious, hang up and search the number above.
FREQUENTLY ASKED QUESTIONS
Area code 423 serves Chattanooga, Tennessee. Area code 423 serves eastern Tennessee including Chattanooga, Johnson City, and the Tri-Cities region. It covers the scenic Tennessee Valley and Great Smoky Mountains foothills.
Area code 423 is in the Eastern timezone. Calls from 423 numbers originate from the Chattanooga region.
Not necessarily. Area code 423 serves many people in Chattanooga. However, scammers can spoof any area code. If you receive a suspicious call from a 423 number, search it above before calling back.
Area code 423 was created in 1995. It serves as the primary geographic code for its region.
WHO CALLED ME
If you received an unknown call from a 423 number, use our dedicated lookup page to identify the caller and check for scam reports.
Who Called Me From 423? →