Terms in this channel
SMS
A2P 10DLC
Learn who needs A2P 10DLC, what Brand and Campaign registration asks for, how fees are shaped, and when another US messaging route fits better.
Read the answerSMSCTIA Messaging Principles
Voluntary CTIA messaging guidance and opt-out expectations.
Read the answerSMSExpress written consent
Consent scope and recordkeeping boundaries.
Read the answerSMSSMS opt-in
SMS permission scope and records.
Read the answerSMSSMS opt-out
SMS opt-out handling and reasonable revocation methods.
Read the answerSMSSMS quiet hours
Recipient-local-time boundaries in the cited US provision.
Read the answerSMSTCPA
TCPA scope and consent boundaries for covered messaging.
Read the answerSMSToll-free verification
Twilio US and Canada toll-free verification scope.
Read the answer