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: ODTNMDONDS0

Remotes:

Switch Switch name Switch type
ODTNMDPORS2  ODENTON PINEY ORCHARD  EXM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-621 A Washington Zone 14 (Baltimore LATA) MD 9212 VERIZON MARYLAND, INC. 238      
301-912 A Washington Zone 14 (Baltimore LATA) MD 9212 VERIZON MARYLAND, INC. 238      
410-305 A Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-519 A Severn MD 9212 VERIZON MARYLAND, INC. 238      
410-551 A Severn MD 9212 VERIZON MARYLAND, INC. 238      
410-672 A Odenton MD 9212 VERIZON MARYLAND, INC. 238      
410-674 A Odenton MD 9212 VERIZON MARYLAND, INC. 238      
443-734 A Severn MD 9212 VERIZON MARYLAND, INC. 238      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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