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.
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Switch: SARNON304MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
519-704 A Sarnia ON 4727 ISP TELECOM, INC. 888 805128    
548-232 A Bright's Grove ON 4727 ISP TELECOM, INC. 888 805128    
548-233 A Petrolia ON 4727 ISP TELECOM, INC. 888 805128    
548-250 A Corunna ON 4727 ISP TELECOM, INC. 888 805128    
548-251 A Wyoming ON 4727 ISP TELECOM, INC. 888 805128    
548-297 A Brigden ON 4727 ISP TELECOM, INC. 888 805128    
548-353 A Oil Springs ON 4727 ISP TELECOM, INC. 888 805128    
548-392 A Alvinston ON 4727 ISP TELECOM, INC. 888 805128    
548-393 A Courtright ON 4727 ISP TELECOM, INC. 888 805128    
548-428 A Sombra ON 4727 ISP TELECOM, INC. 888 805128    
548-705 A Port Lambton ON 4727 ISP TELECOM, INC. 888 805128    
548-706 A Watford ON 4727 ISP TELECOM, INC. 888 805128    

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

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