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: 630 [Rate centres in NPA 630] [Dial plan for NPA 630]

NXX: 478

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
630-478 A Elmhurst IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
630-478 0 Elmhurst IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-07-02   
630-478 1 Elmhurst IL   5562 METROPCS, INC. 358   2011-07-18   
630-478 2 Elmhurst IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2012-01-14   
630-478 3 Elmhurst IL   5562 METROPCS, INC. 358   2011-07-18   
630-478 4 Elmhurst IL   460K FIRST COMMUNICATIONS, LLC 358   2011-07-18   
630-478 5 Elmhurst IL   5562 METROPCS, INC. 358   2011-08-29   
630-478 6 Elmhurst IL   5562 METROPCS, INC. 358   2011-08-29   
630-478 7 Elmhurst IL   7421 AT&T - LOCAL 358      
630-478 8 Elmhurst IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2010-10-01   
630-478 9 Elmhurst IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-10-29   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.