Area Code 443 was added as an overlay to area code 410 for providing numbering relief to the existing area (410). These overlaid area codes serve Mary land State of United States. The particular area being served by these two area codes is the eastern half of the State.
The code 443 went into effect on 1st July 1997. Maryland is Middle Atlantic State - A group of States stretches out between New England and the South are known as Middle Atlantic States. Major regions which compose division are:
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