63107: phone_number must be a valid E.164 formatted phone number

You provided a phone_number value that Twilio could not parse as a valid E.164 phone number. Use a leading +, include the country code, and limit the number to a maximum of 15 digits.

• The phone_number value does not start with + and a country code.
• The phone_number value includes spaces, parentheses, hyphens, or other punctuation.
• The phone_number value is too short, too long, or uses an invalid country code.
• You passed a locally formatted number without converting it to E.164.

• Reformat phone_number as E.164, for example +14155552671.
• Remove formatting characters so the value contains only the leading +, country code, and subscriber number.
• If you collect numbers in local format, collect the country and normalize the number before sending the request.
• Validate the number with Twilio Lookup before sending the request. A regular expression alone cannot confirm that a phone number is valid.

• Messages resource
• What is E.164?
• Formatting and Validation with Lookup