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: HRNDVASTDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
571-434 A Herndon VA 9213 VERIZON VIRGINIA, INC. 236      
703-285 A Washington Zone 17 VA 9213 VERIZON VIRGINIA, INC. 236      
703-404 A Washington Zone 19 VA 9213 VERIZON VIRGINIA, INC. 236      
703-406 A Washington Zone 19 VA 9213 VERIZON VIRGINIA, INC. 236      
703-421 A Herndon VA 9213 VERIZON VIRGINIA, INC. 236      
703-430 A Herndon VA 9213 VERIZON VIRGINIA, INC. 236      
703-433 A Herndon VA 9213 VERIZON VIRGINIA, INC. 236      
703-444 A Herndon VA 9213 VERIZON VIRGINIA, INC. 236      
703-450 A Washington Zone 19 VA 9213 VERIZON VIRGINIA, INC. 236      
703-948 A Washington Zone 19 VA 9213 VERIZON VIRGINIA, INC. 236      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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