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.
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Switch: BTHSMDWWDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-694 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-214 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-295 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-319 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-380 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-400 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236 2010-06-05   
301-493 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-530 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-564 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-571 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-581 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-803 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-896 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    
301-897 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236    

Last updated: Sat, 01 Dec 2018 01:51:37 UTC

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