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: 577

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
630-577 A Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 0 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 1 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 2 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 3 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 4 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 5 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 6 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 7 Naperville Northeast IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2005-12-05   
630-577 8 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      
630-577 9 Naperville Northeast IL NPVLILNEDS0  9329 ILLINOIS BELL TEL CO 358      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.