phone book, or the business directory.

Maryland

Maryland is a Mid-Atlantic state that's defined by its abundant waterways and coastlines on the Chesapeake Bay and Atlantic Ocean. Its largest city, Baltimore, has a long history as a major seaport. Fort McHenry, birthplace of the U.S. national anthem, sits at the mouth of Baltimore’s Inner Harbor, home to the National Aquarium and Maryland Science Center.

The state of Maryland has a population of 5,657,438, and is formerly abbreviated as MD. Maryland has 2,128,530 households in the state, with an average of 2.59 people living in each of them. Of the 5,657,438 people living in Maryland, 48.36% are male, 51.64% are female, 56.87% are married and 43.13% are single. 62.75% of existing homes are owned by inhabitants, with a median home cost of $265,220 in the state.

Air quality in Maryland is rated at 28.3/100, and water quality at 54/100. There are 303.1 physicians in Maryland per 100,000 of the population. Unemployment rates average 7.20% in the state and the sales tax rate is 11.00%.

Average income per household in Maryland is $69,169. 8.22% of households have income levels less than $15,000 per year. 19.09% of households have income levels between $50,000 and $75,000 annually, and 0.96% earn more than $500,000 per year.

Maryland Area Codes

Area code 240 serves the state of Maryland. This area code was assigned on June 21st, 1996. On June 1st, 1997 it went into service. 240 is a General Purpose Code. 240 service area does overlap with 301 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.

Area code 301 serves the state of Maryland. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 301 is a General Purpose Code. 301 service area does overlap with 240 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.

Area code 410 serves the state of Maryland. This area code was assigned on December 28th, 1990. On October 6th, 1991 it went into service. 410 is a General Purpose Code. 410 service area does overlap with 443 667 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.

Area code 443 serves the state of Maryland. This area code was assigned on June 21st, 1996. On June 1st, 1997 it went into service. 443 is a General Purpose Code. 443 service area does overlap with 410 667 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.

Area code 667 serves the state of Maryland. This area code was assigned on January 3rd, 2001. On March 24th, 2012 it went into service. 667 is a General Purpose Code. 667 service area does overlap with 410 443 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.