667 Area Code — Baltimore, MD
Area code 667 serves Baltimore and 2 other cities in Maryland. Local time follows America/New_York. It overlays with 410, 443, so 10-digit dialling is required.
- State
- Maryland
- Primary city
- Baltimore
- Timezone
- America/New_York
- In service since
- 2012
- Type
- Overlay
Overlay of 410
Cities Served by 667
The 667 area code covers 3 cities and communities in Maryland.
- Baltimore
- Annapolis
- Columbia
About Area Code 667
Area code 667 is a North American Numbering Plan (NANP) area code that has been in service since 2012. It is administered by NANPA on behalf of the FCC and serves the Maryland region anchored on Baltimore.
667 is an overlay code, which means it shares its geographic boundaries with one or more existing area codes (410, 443). Overlays are created when a region exhausts the supply of phone numbers in its original area code. Within an overlay region, residents must dial all 10 digits even for local calls, because the same 7-digit number can exist under multiple area codes.
Mobile numbers in 667 are portable: a person who moved away from Baltimore may still carry a 667 mobile number on their device. If you receive an unexpected call from a 667 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Maryland, you may also interact with neighbouring or overlay codes (410, 443). See the related codes section below to explore the rest of Maryland.
Other Maryland Area Codes
Continue exploring the Maryland numbering plan.
667 Area Code FAQ
Where is area code 667?
Area code 667 is located in Maryland, primarily serving Baltimore and surrounding cities including Annapolis, Columbia. The region operates on ET (America/New_York) time.
What state is 667 area code?
667 is a Maryland area code. It was put into service in 2012 as an overlay and shares its geographic footprint with overlay codes 410, 443.
Is 667 a scam area code?
667 is a legitimate North American area code allocated by NANPA to Maryland. Like any geographic area code, scammers sometimes spoof 667 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 667 use?
Area code 667 operates on ET (America/New_York). Numbers in this area code follow standard Maryland time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 667 phone number?
Yes. Use the reverse lookup widget above to enter a full 667 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.
What's the difference between 667 and 410?
667 and 410 cover the same Maryland geographic area as overlay codes. Calls between them are local, but you must dial all 10 digits. New phone numbers in this region are assigned from either pool depending on what's available with the carrier at signup.