Baltimore, Maryland is in area code 410.

Area code 410 was introduced in Maryland on October 6, 1991, as a split from area code 301.

Area code 410 was introduced to accommodate the growing demand for telephone numbers in the eastern part of Maryland, including Baltimore and the Eastern Shore.

Area code 410 is projected to exhaust its available numbers by 2030.

Area codes 443 and 667 are overlaid on area code 410, requiring ten-digit dialing for all local calls.

Major cities covered by area code 410 include Annapolis, Baltimore, Columbia, and Salisbury.

Major carriers in area code 410 include Verizon, Comcast, and Cavalier Telephone.

Area code 410 supports landline, wireless, and VoIP services.

Area code 410 is regulated by the North American Numbering Plan Administration (NANPA) and the Federal Communications Commission (FCC).

Before 410, all of Maryland was under area code 301, assigned in 1947.

Area code 443 was overlaid onto 410 in 1997.

Area code 667 was added as an overlay to 410 and 443 in 2012.

Area code 410 has approximately 24 million available telephone numbers, including numbers from overlaid area codes.

Yes, ten-digit dialing (including the area code) is mandatory for all local calls within area code 410 and its overlays.

Baltimore, Maryland is primarily covered by area code 410. This area code was introduced in 1991, splitting from the original 301, to accommodate the growing demand for phone numbers in the region, including the Baltimore metropolitan area and the Eastern Shore.

Area code 410 has approximately 24 million available phone numbers. However, due to increasing demand, it is projected to be exhausted by 2030. Overlays like area codes 443 and 667 have been implemented to extend its lifespan.

Area code 410 serves the eastern part of Maryland, including the Baltimore metropolitan area and the Eastern Shore. It was established in 1991, originating from a split of the 301 area code.

Area code 410 was introduced on October 6, 1991. This was done to alleviate the increasing demand for phone numbers in eastern Maryland, as the original 301 area code was nearing exhaustion.

Maryland has multiple area codes due to population growth and the increasing need for phone numbers. Area code 410 was introduced in 1991, followed by overlays 443 in 1997 and 667 in 2012, to ensure sufficient numbering resources.

Ten-digit dialing is mandatory for all calls within the 410 area code, even local calls. This means you must dial both the area code and the seven-digit phone number.

Area code 410 covers major cities in eastern Maryland such as Annapolis, Baltimore, Columbia, and Salisbury. For a comprehensive list, consult the official Maryland state website.

While the article does not list the counties, it specifies that area code 410 covers the eastern half of Maryland which includes Baltimore, the Eastern Shore, and surrounding areas.

Area code 410 is regulated by the North American Numbering Plan Administration (NANPA). This organization manages the allocation and assignment of area codes within the North American Numbering Plan.

You should always use 10-digit dialing for any calls within area code 410, including local calls. This practice has been mandatory in the region, ensuring proper call routing and connection.

Area codes 443 and 667 are overlaid on top of area code 410. This means these three area codes serve the same geographic region, requiring 10-digit dialing to differentiate between numbers.