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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: MANRMDMNRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-316 2 Cockeysville MD 9212 VERIZON MARYLAND, INC. 238      
410-329 3 Cockeysville MD 9212 VERIZON MARYLAND, INC. 238      
410-329 5 Cockeysville MD 9212 VERIZON MARYLAND, INC. 238      
410-472 A Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 0 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 1 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 2 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 3 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 4 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 6 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 7 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
410-472 9 Sparks-Glencoe MD 9212 VERIZON MARYLAND, INC. 238      
443-330 8 Cockeysville MD 9212 VERIZON MARYLAND, INC. 238   2006-10-16   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.