Great article! The breakdown of E.164 format and its importance in global telephony is really well explained. The practical examples across different countries make it easy to understand how the format standardizes international communication. One thing I'd add for developers implementing E.164 validation - it's always helpful to test your phone number formatting logic with real-world examples before deploying. I've found tools like phonenumberformatter.app particularly useful for quickly validating numbers across different countries and ensuring they meet E.164 standards.