. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 742 area code) below and access available caller information such as name, address, and more.
Federal Data
State Data
County Data
City Data
Area code 742 covers the Golden Horseshoe region of Southern Ontario, Canada. This area includes the Niagara Peninsula, the city of Hamilton, and the regional municipalities of Halton, Peel, York, and Durham, as well as parts of Northumberland County. It surrounds the city of Toronto.
Area code 742 is part of an overlay system with area codes 905, 289, and 365. Area code 905 was established in October 1993. Area code 289 was overlaid on June 9, 2001. Area code 365 was introduced on March 25, 2013, and area code 742 was added on October 16, 2021. Ten-digit dialing is required for all local calls in this region.
Area code 742 is a General Purpose Code which was placed in service on January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 742 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Ontario geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
|---|
| Rate Center | Number of Prefixes |
|---|
Lookup phone numbers starting with other Ontario area codes:
Ontario Reverse Lookup ➜