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: 557 [Rate centres in NPA 557] [Dial plan for NPA 557]

NXX: 220

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-220 A Creve Coeur MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-03-28   
557-220 0 Creve Coeur MO   093F ONVOY, LLC - MO 520      
557-220 1 Creve Coeur MO   093F ONVOY, LLC - MO 520      
557-220 4 Creve Coeur MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520      
557-220 5 Creve Coeur MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520      
557-220 6 Creve Coeur MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520      
557-220 7 Creve Coeur MO   093F ONVOY, LLC - MO 520      
557-220 8 Creve Coeur MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520      
557-220 9 Creve Coeur MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.