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: GMTWMDGNDS0

Remotes:

Switch Switch name Switch type
PLVLMDPVRS2    RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-686 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236    
301-353 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236    
301-428 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236    
301-444 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236    
301-515 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236    
301-528 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236    
301-540 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236    
301-601 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236    
301-903 A Washington Zone 10 MD 9212 VERIZON MARYLAND, INC. 236    
301-916 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236    
301-972 A Gaithersburg MD 9212 VERIZON MARYLAND, INC. 236    

Last updated: Sat, 01 Dec 2018 01:51:37 UTC

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