Canada's Yellow Pages is the official directory for Canada's top phone companies, and several of its affiliate directories offer comprehensive directory service for residential and business landline phone numbers in Ontario. Canadian online phone directories include Canada411, White Pages Canada and CanPages.
As of 2015, the largest and most comprehensive online directory serving Canada is White Pages, which also provides reverse phone lookup, postal code and area code lookup, and reverse address lookup. CanPages provides print phone directories as well as maps that identify the locations of listings. Unlisted numbers and cell phones are not available in any free online directories, but interested parties can obtain them through paid services.