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: BTHSMDWWDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-694 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-214 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-295 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-319 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-380 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-400 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236   2010-06-05   
301-493 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-530 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-564 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-571 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-581 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-803 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-896 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      
301-897 A Washington Zone 2 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Thu, 31 Jan 2019 11:20:40 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.