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: BRRDMDBRRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-283 A Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-283 0 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-283 2 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-283 3 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-283 4 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-283 5 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-283 6 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-375 A Indian Head MD 9212 VERIZON MARYLAND, INC. 236      
301-375 6 Indian Head MD 9212 VERIZON MARYLAND, INC. 236      
301-375 7 Indian Head MD 9212 VERIZON MARYLAND, INC. 236      
301-375 8 Indian Head MD 9212 VERIZON MARYLAND, INC. 236      
301-375 9 Indian Head MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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