Maryland Area Codes – List Of Area Codes And Maps

Maryland is Officially using 5 Maryland Area Codes. In Which Only 2 Of Them Are Overlay Codes. Maryland officially have one area code 301, when the numbering system was established in 1947 The most recently added was 667 in March 24, 2012 as an overlap of 410. After Increasing in Population 5 other Maryland Area Codes Are Establish. And Today Area Code 667 Is the Most Populated Areas with 3.2 million of the state 5.9 million residents.

Maryland Area Codes

Maryland Officially Using 5 Maryland Area Codes, They Are :-

Maryland States Are Served By The Following Maryland Area Codes :

240/301 – They serve western Maryland, including its suburbs of Washington, D.C.

410/443/667 – They serve eastern Maryland including Baltimore and Annapolis.

History And Changes In Maryland Area Codes

In 01/01/1947 – Maryland Area Codes 301 was out into service. Area code 301 was Divide to form area code 410 In 1991. In 1997 area codes 301 Overlap with area code 240.

In 10/06/1991 – Area code 410 was put out into service. Area code 410 was created from a division of area code 301. In 1997 area code 410 overlap with area code 443.

In 06/01/1997 – Area code 240 was out into service. Area code 240 is an overlap of area code 301.

In 06/01/1997 – Area code 443 was put out into service. Area code 443 is an overlap of area code 410.

In 03/24/2012 – Area code 667 was put into service as an overlap of area code 443 and 410. The new overlap plan is 410/443/667.

Maryland Area Codes

What Is Area Code?

Area code is a three digit code in which the us and other countries are divided. It is Also a local telephone dialling code where They Call each other With These Codes.

Why are area codes added?

When The Current Area Codes Expires Or Increase in use of cellular phones, modems, and Internet access It Creates Problem. So That why Area Codes Are Added And each area code has a potential capacity of about 8 million unique phone numbers


Once The new Area Codes Rae assigned there is usually a 6 Months Period To Move. At that time Customers Are Encouraged To Use The Code But Seven Digit Dialling is Allowed. After 6 Months customers are required to use the new telephone no.

Other Area Codes

Leave a Reply

Your email address will not be published. Required fields are marked *