The area code 742 has been reserved by the Canadian province of Ontario and has not yet been assigned to any customers. Area code 742 will be released as area codes 365, 289 and 905 are exhausted. The Canadian Numbering Administrator estimated that this will happen in the year 2036.
There are several complaints logged online regarding scam artists and solicitors using phone numbers with area code 742. Most of these complaints involve men with heavy accents trying to obtain personal information or access to a person's computer. Use extreme caution when picking up a call from this area code.