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: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 454

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-454 A Martin SD SXFLSDCONMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 0 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 1 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 2 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 3 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 4 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 5 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      
605-454 6 Martin SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.