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: ODTNMDPORS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-912 3 Washington Zone 14 (Baltimore LATA) MD 9212 VERIZON MARYLAND, INC. 238      
301-912 5 Washington Zone 14 (Baltimore LATA) MD 9212 VERIZON MARYLAND, INC. 238      
410-672 5 Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-672 6 Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-672 7 Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-695 A Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-695 0 Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-695 1 Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-695 2 Odenton MD 9212 VERIZON MARYLAND, INC. 238      
443-274 A Severn MD 9212 VERIZON MARYLAND, INC. 238      
443-274 9 Severn MD 9212 VERIZON MARYLAND, INC. 238      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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