Twilio is requiring all businesses sending messages from 10-digit long code (10DLC) phone numbers to register those phone numbers and provide information about their texting use cases. After August 31, 2023, Twilio will completely block all unregistered U.S.-bound 10DLC messages to ensure responsible use of text messaging and maintain compliance with regulations. Businesses must register as either an independent software vendor (ISV) or direct customer, and provide necessary information such as contact details, business registration ID, and use case types. The registration process involves three steps: registering the brand, creating a campaign, and linking A2P campaign use cases to a messaging service. After registration, businesses can ensure all their Twilio use cases and numbers are properly registered by checking the status of each phone number in the Console or using the API. Complying with 10DLC requirements unlocks benefits such as improved deliverability, reduced filtering risks, and enhanced access to higher-message throughput.