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 Eff date Disc date
301-942 A Washington Zone 11 MD WHTNMDWTDS0  236    
301-946 A Washington Zone 11 MD WHTNMDWTDS0  236    
301-947 A Gaithersburg MD GTBGMDGBPS0  236    
301-948 A Washington Zone 10 MD GTBGMDGBPS0  236    
301-949 A Washington Zone 11 MD WHTNMDWTDS0  236    
301-951 A Washington Zone 2 MD CHCHMDBEDS0  236    
301-952 A Washington Zone 15 MD MRBOMDMBDS0  236    
301-953 A Washington Zone 13 MD LARLMDLRDS0  236    
301-953 0 Washington Zone 13 MD   236    
301-953 1 Washington Zone 13 MD   236    
301-953 2 Washington Zone 13 MD   236    
301-953 3 Washington Zone 13 MD   236    
301-953 7 Washington Zone 13 MD   236    
301-953 8 Washington Zone 13 MD   236    
301-953 9 Washington Zone 13 MD   236    
301-954 A Washington Zone 4 (Baltimore LATA) MD WDLWMDWLDS0  238    
301-956 A Gaithersburg MD GTBGMDGBPS0  236    
301-956 1 Gaithersburg MD   236    
301-961 A Washington Zone 2 MD CHCHMDBEDS0  236    
301-962 A Washington Zone 11 MD WHTNMDWTDS0  236    
301-962 0 Washington Zone 11 MD   236    
301-962 1 Washington Zone 11 MD   236    
301-962 3 Washington Zone 11 MD   236    
301-962 4 Washington Zone 11 MD   236    
301-962 5 Washington Zone 11 MD   236    
301-962 6 Washington Zone 11 MD   236    
301-962 7 Washington Zone 11 MD   236    
301-962 8 Washington Zone 11 MD   236    
301-962 9 Washington Zone 11 MD   236    
301-963 A Gaithersburg MD GTBGMDGBPS0  236    
301-965 4 Washington Zone 6 MD   236 2007-04-27   
301-966 1 Washington Zone 12 MD   236 2012-12-10   
301-966 4 Washington Zone 12 MD   236 2012-12-10   
301-966 5 Washington Zone 12 MD   236 2012-12-10   
301-966 8 Washington Zone 12 MD   236 2012-12-10   
301-967 A Washington Zone 5 MD STLDMDSLDS0  236    
301-970 A Washington Zone 14 (Baltimore LATA) MD PARLMDPADS0  238    
301-970 2 Washington Zone 14 (Baltimore LATA) MD   238    
301-970 5 Washington Zone 14 (Baltimore LATA) MD   238    
301-971 5 Washington Zone 6 MD   236 2013-02-25   
301-971 6 Washington Zone 6 MD   236 2013-02-25   
301-972 A Gaithersburg MD GMTWMDGNDS0  236    
301-975 A Washington Zone 10 MD GTBGMDGBPS0  236    
301-975 0 Washington Zone 10 MD   236    
301-975 1 Washington Zone 10 MD   236    
301-975 2 Washington Zone 10 MD   236    
301-975 3 Washington Zone 10 MD   236    
301-975 4 Washington Zone 10 MD   236    
301-975 5 Washington Zone 10 MD   236    
301-975 6 Washington Zone 10 MD   236    

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Last updated: Fri, 07 Sep 2018 02:13:12 UTC

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