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.

NPA: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

NXX: 231

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-231 A Washington Zone 8 VA ALXNVAMVDS0  9213 VERIZON VIRGINIA, INC. 236      
571-231 0 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 1 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 2 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 3 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 4 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 5 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 6 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 7 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 8 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      
571-231 9 Washington Zone 8 VA   9213 VERIZON VIRGINIA, INC. 236      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.