cmoore@brl.mil (VLD/VMB) (02/10/91)
I have been using the C&P help line regarding prefixes near what will become the 301/410 boundary. The number, for those of you who don't know it, is 800-477-4704, and if you need to enter a prefix or get some other specific information, you will need touch-tone capability. If I just want to look up a specific prefix (such as 775 Union Bridge, which is going into 410), I hit 1 to cut the introductory message short, but then the system does not work unless I wait for end of message saying "To find what area code..." or words similar, and then I have to enter the prefix SLOWLY. Everything east of the Susquehanna River and Chesapeake Bay will go into 410. To the west of those, here is the split by county, with the possible exception of "noise" along some county lines: Going into 410: Harford, Baltimore, Carroll, Howard, Anne Arundel, Calvert counties, and Baltimore city. Staying in 301: Saint Marys, Charles, Prince Georges, Montgomery, Frederick, Washington, Allegany, Garrett counties.