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Maryland is divided into two geographic zones, with a line running from northwest to southeast.
On the northeast side, including Baltimore, Annapolis, and the Atlantic coast, the area codes are +1 410, +1 443, and +1 667.
On the southwest side, including the D.C. suburbs, Frederick, and Cumberland, the area codes are +1 301 and +1 240.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
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What US cities are served by the 301 area code?
The 301 area code was intoduced on January 31, 2006. The 301 area code covers certain areas of Maryland, inxluding the major city of Rockwell, Maryland.
When did Maryland add the 410 area code?
Area code 410, serving the northern/eastern parts of Maryland, went into service on October 6, 1991. Prior to that date, all of Maryland was area code 301.
What is the area code for the Indian Ocean?
The Indian Ocean doesn't have an area code.
What is the area code for Waldorf Maryland?
Waldorf, MD, is in area code 301 with overlay code 240.
What is the area with the ZIP code of 20746?
Suitland Maryland
Where is prefix 425 with area code 301?
Maryland suburbs of Washington, D.C., specifically the zone designated "Washington 13"
What is the area code for Redwood City CA?
Redwood City is in area code 650.
What is the area code for Missouri City TX?
Missouri City is in area code 281, with overlay code 832. There may also be some Missouri City numbers in area code 713.
What is the area code for Rockwell City Iowa?
Rockwell City, Iowa, is in area code 712.
What is the area code for Traverse City MI?
Traverse City, Michigan, is in area code 231.
What is the area code for the whole Davao City?
The area code for the whole Davao City is 082.
What is Johnson city NY area code?
Johnson City, NY, is in area code 607.
