Troubleshooting steps
Verify phone number format (E.164), check if number is valid, verify country support
API Error Codes
20008 – Invalid Phone Number
Phone number is invalid
Details
The phone number provided is invalid or not in correct format.
Error typeerror
MeaningInvalid phone number
Typical causesWrong format, invalid number, unsupported country
SolutionsVerify phone number format (E.164), check if number is valid, verify country support
Severitymedium
Catalog references
Where this appears
Twilio20008
Utilities
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FAQ
Common questions
What format is required?
Use E.164 format: +[country code][number], e.g., +14155551234 for US numbers.
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