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: SLSPMDSSDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-662 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-285 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-427 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-495 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-562 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-563 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-565 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-578 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-585 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-587 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-588 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-589 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-608 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-626 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-650 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-819 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-930 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.