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.

Switch: CTGYPQ131MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
450-287 A Châteauguay QC 4727 ISP TELECOM, INC. 888 805010    
450-289 A Beauharnois QC 4727 ISP TELECOM, INC. 888 805010    
450-290 A Saint-Constant QC 4727 ISP TELECOM, INC. 888 805010    
450-301 A Saint-Rémi QC 4727 ISP TELECOM, INC. 888 805010    
450-519 A Sainte-Martine QC 4727 ISP TELECOM, INC. 888 805010    
450-520 A Saint-Chrysostome QC 4727 ISP TELECOM, INC. 888 805010    
579-332 A Howick QC 4727 ISP TELECOM, INC. 888 805010    

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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