Area Code Details for: 357
Inactive Area Code
Area code 357 is currently inactive. An inactive area code cannot be used for phone calls or text messages. If you receive a message or phone call from this area code, it is likely a spoofed call that could be malicious or spam.
March 26, 2025
Planned In-Service Date
The North American Numbering Plan Administrator (NANPA) has not assigned area code 357. It may be reserved for future use.
Learn MoreLocation
State
California
Country
US
Details
State | California (CA) |
Time Zone | |
Parent NPA | 559 |
Relief Planning in ProgressArea code relief planning is the process of addressing the exhaustion of available telephone numbers within an area code. When the supply of numbers in an existing area code is running low, NANPA works with the telecommunications industry to introduce new area codes. | Yes |
In Service Date | March 26, 2025 |
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