Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: HRNDVACKAMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-247 A Washington Zone 1 DC 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
202-247 9 Washington Zone 1 DC 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
202-350 8 Washington Zone 1 DC 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
202-527 6 Washington Zone 1 DC 2217 ATX TELECOMMUNICATIONS SERVICES, LTD. - MD 236      
202-527 7 Washington Zone 1 DC 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
202-719 9 Washington Zone 1 DC 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
240-844 9 Ridge MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-274 8 Hughesville MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-281 8 Washington Zone 6 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-287 8 Washington Zone 11 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-290 3 Mechanicsville MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-392 8 La Plata MD 2217 ATX TELECOMMUNICATIONS SERVICES, LTD. - MD 236      
301-531 9 Washington Zone 4 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-542 8 Waldorf MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-812 9 Washington Zone 15 (Baltimore LATA) MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 238      
301-836 9 Washington Zone 5 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-850 9 Washington Zone 14 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-886 8 Washington Zone 13 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-915 9 Washington Zone 2 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-917 6 Washington Zone 10 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-920 9 Washington Zone 3 MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-974 6 Laurel MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-994 8 Lexington Park-Great Mills MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
301-997 9 Leonardtown MD 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
571-224 0 Washington Zone 19 VA 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
571-283 6 Herndon VA 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
571-339 6 Engleside VA 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
571-438 A Washington Zone 8 VA 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
571-438 6 Washington Zone 8 VA 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
571-594 5 Washington Zone 17 VA 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
571-722 1 Washington Zone 17 VA 1960 ATX TELECOMMUNICATIONS SERVICES, LTD. - VA 236      
703-678 0 Washington Zone 8 VA 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
703-888 A Washington Zone 8 VA 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      
703-888 4 Washington Zone 8 VA 1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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