We strongly encourages E.164 phone number formatting for all phone numbers. This is an internationally recognized standard phone number format that will help to ensure deliver-ability of SMS messages across the globe.
Please use an E.164 formatted phone number for sending SMS messages to ensure successful delivery.
E.164 Phone Number Formatting
E.164 formatting for phone numbers entails the following:
- A + (plus) sign
- International Country Calling code
- Local Area code
- Local Phone number
In the UK, and many other countries internationally, local dialing may require the addition of a ‘0’ in front of the subscriber number. With E.164 formatting, this ‘0’ must usually be removed.
Help with E.164 Formatting