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: ALTWMDATRP0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-234 A Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-234 0 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-248 A Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-265 A Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-265 0 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-265 1 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-265 8 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-265 9 Washington Zone 6 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 A Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 0 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 1 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 4 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 5 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 6 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 7 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 8 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-297 9 Washington Zone 16 MD 9212 VERIZON MARYLAND, INC. 236      
301-433 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-433 0 Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      
301-449 A Washington Zone 5 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.