. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 357 area code) below and access available caller information such as name, address, and more.
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Area code 357 covers the central San Joaquin Valley in central California.
Area code 357 is an overlay to area code 559, both serving the same geographic region. Area code 559 was placed in service in 1998, and area code 357 was added in 2025. Ten-digit dialing is required in this region.
Area code 357 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 357 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, California geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
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| Rate Center | Number of Prefixes |
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