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: BTHSMDWADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-227 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-229 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-243 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-263 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-263 0 Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-263 1 Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-263 2 Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-263 9 Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-320 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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