Who is calling from 423?
Area code 423 belongs to Chattanooga, Tennessee. Enter the full number to see the carrier, line type and location free, and the owner name when on record.
East Tennessee (Chattanooga, Johnson City) is Eastern.
Places served by 423
NANPA rate centers in 423, ranked by how many phone prefixes each holds.
Who holds 423 numbers
764 prefixes (423-XXX) are assigned. Carriers holding the most:
About 21% of 423 prefixes are held by wholesale carriers that commonly supply numbers to VoIP and texting apps (such as Google Voice or TextNow). A number from one of those blocks may not belong to a traditional phone line. What a VoIP number means.
Got a call or text from a 423 number?
- Don't call back until you know who it is. Scam calls often use local-looking numbers, and caller ID can be spoofed (FCC).
- Type the full number above. Carrier, line type and city are shown before anything is charged.
- If it is someone you met on a dating app, see reverse phone lookup for dating.
- Recognize the common scripts: fake bank alerts, unpaid toll texts, fake government agents, one-ring calls. All current phone scams.
- Report scam calls at ReportFraud.ftc.gov and add your number to the National Do Not Call Registry.
Other Tennessee area codes · see all
Questions about 423
Where is area code 423?
423 is an area code for Chattanooga, Tennessee, also serving places such as Johnson Cy, Bristol, Cleveland.
What time zone is 423?
Eastern Time (ET). East Tennessee (Chattanooga, Johnson City) is Eastern.
Is a call from 423 a scam?
The area code alone cannot tell you. Scammers spoof local-looking numbers, so check the full number: a reverse lookup shows the line type and carrier for free, and the owner name when it is on record.
Who called me from 423?
Enter the full 423 number in the search box on this page. TrueSearch shows the carrier, line type and location free, and the owner name when it is on record. If no name is found, you do not pay.
All 423 prefixes (764)
Location is derived from the area code and may not reflect where the caller is now. Places and carriers come from the NANPA prefix report; time zones from the IANA database. TrueSearch compiles publicly available information and licensed telecom data. Not a consumer reporting agency. Not for FCRA purposes such as employment, tenant, credit or insurance screening.