The western portion of Maryland, USA, at the moment utilizing a Numbering Plan Space overlay complicated comprising space codes 301 and 240 will, beginning June 14, 2023, use a 3rd space code 227, additionally overlaying this identical geographic space. Among the cities and cities at the moment served by NPAs 301/240: Bethesda, Gaithersburg, Germantown, Frederick, Silver Spring and Waldorf.
Already utilizing overlaying space codes, the dialing plan on this a part of Maryland requires 10 digit dialing for native calls and 1+10 digits for toll calls originating right here. This dialing plan won’t change with the brand new NPA’s addition.
Go to area code 227 web page for a listing of cities served, map and different data.