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: OSHWON95X8X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
289-481 A Oshawa ON 4727 ISP TELECOM, INC. 888 805118    
289-482 A Ajax-Pickering ON 4727 ISP TELECOM, INC. 888 805118    
289-483 A Whitby ON 4727 ISP TELECOM, INC. 888 805118    
289-484 A South Pickering ON 4727 ISP TELECOM, INC. 888 805118    
289-485 A Port Perry ON 4727 ISP TELECOM, INC. 888 805118    
365-232 A Bowmanville ON 4727 ISP TELECOM, INC. 888 805118    
365-263 A Newcastle ON 4727 ISP TELECOM, INC. 888 805118    
365-264 A Blackstock ON 4727 ISP TELECOM, INC. 888 805118    
365-283 A Hampton ON 4727 ISP TELECOM, INC. 888 805118    
365-316 A Newtonville ON 4727 ISP TELECOM, INC. 888 805118    
365-896 A Brooklin ON 4727 ISP TELECOM, INC. 888 805118    
365-897 A Orono ON 4727 ISP TELECOM, INC. 888 805118    

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

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