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.

OCN: 9212 VERIZON MARYLAND, INC.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
301-515 A Gaithersburg MD GMTWMDGNDS0  236      
301-516 A Washington Zone 5 MD STLDMDSLDS0  236      
301-517 A Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 0 Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 1 Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 2 Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 3 Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 4 Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 5 Washington Zone 10 MD RKVLMDRVDS1  236      
301-517 8 Washington Zone 10 MD RKVLMDRVDS1  236      
301-519 A Gaithersburg MD GTBGMDGBPS0  236      
301-521 A Washington Zone 6 MD OXHLMDOHDS0  236      
301-522 A Washington Zone 11 MD RKVLMDMRDS0  236      
301-527 A Gaithersburg MD GTBGMDGBPS0  236      
301-528 A Gaithersburg MD GMTWMDGNDS0  236      
301-530 A Washington Zone 2 MD BTHSMDWWDS0  236      
301-533 A Oakland MD OKLDMDOKDS0  240      
301-533 0 Oakland MD OKLDMDOKDS0  240      
301-533 1 Oakland MD OKLDMDOKDS0  240      
301-533 2 Oakland MD OKLDMDOKDS0  240      
301-533 3 Oakland MD OKLDMDOKDS0  240      
301-533 4 Oakland MD OKLDMDOKDS0  240      
301-539 4 La Plata MD LPLTMDLADS0  236   2005-05-24   
301-539 7 La Plata MD LPLTMDLADS0  236   2007-12-11   
301-540 A Gaithersburg MD GMTWMDGNDS0  236      
301-544 A Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 A Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 0 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 1 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 4 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 5 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 6 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 7 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 8 Washington Zone 10 MD RKVLMDRVDS1  236      
301-545 9 Washington Zone 10 MD RKVLMDRVDS1  236      
301-546 A Washington Zone 4 MD LDVRMDLODS0  236      
301-546 0 Washington Zone 4 MD   236   2014-06-06   
301-546 1 Washington Zone 4 MD   236   2014-06-06   
301-546 2 Washington Zone 4 MD   236   2014-06-06   
301-546 3 Washington Zone 4 MD   236   2014-06-06   
301-546 4 Washington Zone 4 MD   236   2014-06-06   
301-546 5 Washington Zone 4 MD   236   2014-06-06   
301-546 6 Washington Zone 4 MD   236   2014-06-06   
301-546 7 Washington Zone 4 MD   236   2014-06-06   
301-546 8 Washington Zone 4 MD   236   2014-06-06   
301-546 9 Washington Zone 4 MD   236   2014-06-06   
301-548 A Washington Zone 10 MD GTBGMDGBPS0  236      
301-549 A Ashton MD LARLMDLRDS0  236      
301-549 1 Ashton MD LARLMDLRDS0  236      
301-549 3 Ashton MD LARLMDLRDS0  236      

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Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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