### Validate phone numbers in a Google Sheet with Twilio Lookup To validate phone numbers stored in a Google Sheet, use the Twilio Lookup API's free formatting and validation functionality. This can be achieved by integrating with Google Sheets using Google's Apps Script and Twilio Functions. A free Twilio Account is required for this integration. The process involves deploying a project on CodeExchange, creating an App Script to call out to the Lookup function from the spreadsheet, and running the validation script from the sheet. After deployment, a new menu item "Validate Phone Numbers" will be available in the spreadsheet, allowing users to validate phone numbers with just a click. This integration can be extended with other Lookup packages and used as a foundation for more advanced applications such as SMS notifications or message logging.