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: HYVLMDRIDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-408 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 0 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 1 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 2 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 3 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 4 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 5 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-408 7 Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-422 A Washington Zone 4 MD 9212 VERIZON MARYLAND, INC. 236      
301-431 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-434 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-439 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-445 A Washington Zone 3 MD 9212 VERIZON MARYLAND, INC. 236      
301-935 A Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-935 0 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-935 4 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-935 5 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      
301-935 6 Washington Zone 13 MD 9212 VERIZON MARYLAND, INC. 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.