What does the E. 164 format apply to in SMS/MMS Compliance?

The E. 164 format applies specifically to the formatting of phone numbers. This international standard ensures that phone numbers are structured in a consistent manner, primarily for the purpose of global telecommunications. It defines how numbers should be formatted, including the country code and number length, enabling seamless communication across different countries and networks.

In the context of SMS/MMS compliance, using the E. 164 format is crucial because it helps ensure that messages are delivered correctly to recipients regardless of their geographical location. Adhering to this standard minimizes the chances of errors in message delivery and supports compliance with regulations that require accurate identification of users and their phone numbers. This standardization is fundamental to maintaining the integrity and reliability of messaging systems, as it reduces confusion that may arise from various local number formats.