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: BLTMMDYKDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-323 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-372 A Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-372 0 Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-372 1 Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-372 2 Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-372 8 Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-372 9 Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-377 A Towson MD 9212 VERIZON MARYLAND, INC. 238      
410-433 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-435 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 0 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-464 9 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-532 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
410-617 7 Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
443-444 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      
443-444 0 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 1 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 2 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 3 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 4 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 5 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 6 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 7 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 8 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   
443-444 9 Baltimore MD 9212 VERIZON MARYLAND, INC. 238   2005-08-27   

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

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