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: UPMRMDCCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-218 A Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-249 A Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-390 A Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 A Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 0 Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 2 Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 5 Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 6 Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 7 Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      
301-430 8 Washington Zone 14 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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