Baltimore City · Maryland
Baltimore, MD area codes and time zone
Quick answer
Baltimore is served by area codes 240, 301, 410, 443, 667, keeps EST time (GMT-5), and sits in county FIPS 24510.
- Area codes
- 240 · 301 · 410 · 443 · 667Within 25 miles of the city centre
- Time zone
- ESTAmerica/New_York
- UTC offset
- GMT-5EDT in summer (UTCGMT-4)
- County FIPS
- 24510Baltimore City
Dialling from and to Baltimore
What this means when you pick up the phone.
Because more than one code covers this area, ten-digit dialling applies for local calls: area code plus number, every time. From abroad, dial +1 then the ten digits.
How Baltimore came to have several area codes
Why one city can carry several codes.
Area codes are assigned to geography, then exhausted as demand grows. Baltimore — population about 565k — is covered by codes 240, 301, 410, 443, 667, drawn from within 25 miles of the city centre. Because these 5 codes serve the same footprint, they are overlays: the number pool ran low and a new code was layered on top rather than splitting the city apart. All ten digits are required for every local call.
More Baltimore data
Other Baltimore datasets on this site.
- Baltimore population and income
- Baltimore sales tax rate
- Baltimore property tax
- Baltimore cost of living
- Baltimore home values and rent
- Baltimore crime rates
- Baltimore public schools
- Baltimore weather normals
- Baltimore commute times
Statewide: Maryland cities · Maryland ZIP codes · Maryland sales tax · Maryland counties