. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 437 area code) below and access available caller information such as name, address, and more.
Federal Data
State Data
County Data
City Data
Area code 437 covers the city of Toronto, Ontario, Canada.
Area code 437 is part of an overlay complex with area codes 416, 647, and 942. Area code 416 was introduced in 1947, 647 in 2001, 437 in 2013 and 942 in 2025. Ten-digit dialing is mandatory in this region.
Area code 437 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 437 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 ➜