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  2. Area codes 410, 443, and 667 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_410,_443,_and_667

    While Maryland would have needed a second area code at some point due to rapid growth in the Washington and Baltimore suburbs, it is very likely that the immediate need for another area code would have been staved off had it been possible to assign more 301 numbers to the Baltimore area before 1990. Area code 410 officially entered service on ...

  3. Category:Companies based in Baltimore - Wikipedia

    en.wikipedia.org/wiki/Category:Companies_based...

    This page was last edited on 16 February 2024, at 22:55 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  4. List of Maryland area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Maryland_area_codes

    The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667 The state of Maryland is served by the following area codes: Area codes

  5. Area codes 301, 240, and 227 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_301,_240,_and_227

    Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more ...

  6. Carroll-Camden Industrial Area, Baltimore - Wikipedia

    en.wikipedia.org/wiki/Carroll-Camden_Industrial...

    Guidepost sign pointing an entry to the Carroll-Camden Industrial Area from Russell Street in Baltimore. ... Maryland: City: Baltimore: Time zone ... −4 : Area ...

  7. Business in Maryland - Wikipedia

    en.wikipedia.org/wiki/Business_in_Maryland

    Counties in the highly developed corridor between Baltimore and Washington, D.C., where nearly 90% of Maryland's 5.7 million residents live, [11] typically experience the lowest unemployment rates, according to the Maryland Department of Labor, Licensing & Regulation and Maryland Department of Business and Economic Development.

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