60703: Invalid phone numbers format

This error occurs when the origination or destination phone number in your request is not in E.164 format. Use E.164 formatting for To and From phone numbers in API requests. The Messaging API requires the recipient phone number in To to be in E.164 format.

• The origination or destination number is missing the leading + sign.
• The phone number includes separators such as spaces or dashes instead of a continuous E.164 value.
• The number was submitted in a local or national format without the full country code required by E.164. (help.twilio.com)
• The To value in your Messaging API request is not a recipient phone number in E.164 format.
• The From value is being sent as a phone number, but it is not formatted as a valid Twilio sender in E.164.

• Update the From and To values so each phone number is in E.164 format, for example +14155552671. (help.twilio.com)
• Remove spaces, dashes, and other formatting characters from the phone number before sending the request.
• Include the country code for each number. If you are converting a local number to E.164, remove any domestic dialing prefix such as a leading 0 when required for that country. (help.twilio.com)
• If you are sending a message with the Messaging API, make sure To contains the recipient phone number in E.164 format and From is a valid Twilio sender for your account.

• Messages resource
• Messaging API overview
• Formatting International Phone Numbers