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Area Code Information \ Area Code Maps
Maryland
Area Code Information
Area Code Maps
Recent and Upcoming Changes
Understanding Area Codes
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Maryland
Area Codes
240, 301, 410, 443, 667

Area Code Updates

To ensure a continuing supply of new telephone numbers in the geographic area served by the 410 and the 443 area codes, the Maryland Public Service Commission has approved the addition of a new area code (667) to cover the same geographical area as the 410 and the 443 area codes.

What is an Area Code Overlay?

An overlay is the addition of another area code (667) to the same geographic region as existing area codes (410/443). This overlay does not require you to change your existing area code or phone number or how you dial your local calls. Continue to dial Area Code + 7 digit telephone number (10 digits) for all local calls.


Who Will be Affected and When Will the Change Begin?

Beginning March 24, 2012, Maryland customers in the current 410/443 region requesting new service, an additional line, or, in some cases, moving their service may be assigned a number using the new 667 area code. The 667 area code will co-exist across the region in Maryland with the 410 and 443 area codes.


What Will You Need to Do?

Customers should continue to identify their telephone number as a ten digit number (Area Code + 7 digit telephone number), and include the area code when giving the number to their friends, family, business associates and customers, etc. Customers should ensure that all services, automatic dialing equipment, applications, software, or other types of equipment recognize the new 667 area code as a valid area code. Some examples are life safety systems, fax machines, Internet dial-up numbers, alarm and security systems, gates, speed dialers, mobile phone contact lists, call forwarding settings, voicemail services, and similar functions. Be sure to check your business stationery, advertising materials, personal checks, and your personal or pet ID tags to ensure the area code is included in your telephone number. Remember that all local calls must be programmed using 10-digits and you need to add “1” for all long distance calls.


What Will Remain the Same?

•  Your current telephone number, including current area code, will not change. •  You will continue to dial area code + telephone number for all local calls.
•  You will continue to dial 1+ area code + telephone number for all long    distance calls.
•  What is a local call now will remain a local call.
•  The price of a call, coverage area, or other rates and services will not change    due to the overlay.
•  You can still dial just three digits to reach 911.


Whom May You Contact with Questions?

If you have any questions regarding information provided in this notice, please call Verizon at the following toll-free number: 1-800-VERIZON (1-800-837-4966)

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