List of Maryland area codes on:
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The state of Maryland is served by the following area codes:
{{Area code list
Area code list
Maryland
The state of Maryland is served by the following area codes:
{{Area code list
Area code list
Maryland
Area codes
A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...