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: TMHLMDTHDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-695 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
240-695 5 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-238 A Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-238 0 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236   2001-12-21   
301-238 1 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236   2004-07-10   
301-238 2 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-238 3 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 0 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 1 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 2 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 3 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 4 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 5 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 6 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-316 7 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-423 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-505 A Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-630 A Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-702 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-836 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-836 7 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-894 A Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-899 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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