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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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-970 A Washington Zone 14 (Baltimore LATA) MD 9212 VERIZON MARYLAND, INC. 238      
410-224 A Annapolis MD 9212 VERIZON MARYLAND, INC. 238      
410-266 A Annapolis MD 9212 VERIZON MARYLAND, INC. 238      
410-571 A Annapolis MD 9212 VERIZON MARYLAND, INC. 238      
410-573 A Annapolis MD 9212 VERIZON MARYLAND, INC. 238      
410-841 A Severna Park MD 9212 VERIZON MARYLAND, INC. 238      
410-849 A Sherwood Forest MD 9212 VERIZON MARYLAND, INC. 238      
410-897 A Annapolis MD 9212 VERIZON MARYLAND, INC. 238      
410-946 A Severna Park MD 9212 VERIZON MARYLAND, INC. 238      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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