What area code is 443?
Here's everything about it.
Instant lookup for the 443 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
443 at a glance
Summary
Cities & regions served by 443
Baltimore (overlay)4 communities on record for 443.
Where 443 sits on the map
Overlay: 667Coverage area
About the 443 region
443 covers Baltimore in Maryland, including Annapolis, Columbia and Atlantic Ocean. The code has been in service since 1997.
443 itself is an overlay: it shares its territory with 410 and was introduced when those codes ran low on new number combinations. New lines may receive either code, calls between them are local, and 10-digit dialing is required across the region.
Overlaid on 410; 2012: overlaid by 667.
Who called me from 443?
Community reports- Caller ID is trivially spoofed: an incoming call that displays 443 does not prove the caller is really in the 443 region or even in the United States.
- Avoid calling back unknown one-ring numbers — some premium-rate scams rely on curiosity callbacks.
- Never share verification codes, payment details, or remote access during an unsolicited call, even if the caller claims to be your bank or a government agency.
- When a 443 call pressures you to act immediately, hang up and contact the organization directly through its official number.
Be the first to add a community report for a 443 number below.
Frequently asked questions
FAQWhat area code is 443?+–
443 is a telephone area code serving Baltimore in Maryland, United States, in service since 1997.
Where is area code 443 located?+–
It covers Baltimore County, Calvert County, Harford County and other counties, including Annapolis, Columbia and Atlantic Ocean in Maryland.
What cities are in area code 443?+–
Major communities on record include Annapolis, Columbia and Atlantic Ocean. The code's territory spans the Baltimore region of Maryland.
What time zone is 443?+–
443 observes Eastern (ET), which is UTC−5 / −4 DST and follows daylight saving time.
When did area code 443 start?+–
443 entered service in 1997. Its history: overlaid on 410; 2012: overlaid by 667.
Why do calls to 443 require 10-digit dialing?+–
443 shares its territory with overlay code 667. Because both codes serve the same geographic area, the phone network needs all 10 digits to route a call, and calls between the codes are still local.
Is 443 a scam area code?+–
Scam and robocall traffic can use any North American code, 443 included — caller ID is easy to spoof, so the code alone does not tell you who is really calling. Check the community reports on this page before calling back an unknown 443 number, and report anything suspicious.
Can I get a 443 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 443 number regardless of where you physically live, although in an overlaid region you may be assigned 410 instead.