10DLC Filtering: Campaign Registration
Understand US carrier 10DLC spam filters, TCR vetting scores, unregistered traffic penalties, and why verification codes are blocked.
Systematic Delivery Diagnostic Tree
The Campaign Registry (TCR) Brand Registration
All Application-to-Person (A2P) messaging on standard 10-digit long codes (10DLC) requires an approved brand registration tied to a valid EIN/tax ID.
Campaign Use-Case Vetting & Trust Scores
Carriers evaluate campaign descriptions and sample messages. Low trust scores result in strict throughput caps (e.g. 2,000 messages/day across T-Mobile).
Unregistered Traffic Surcharges & Hard Drops
Unregistered traffic incurs severe per-message carrier surcharges (up to $0.005/msg penalty) and is subjected to aggressive Bayesian spam filtering, often dropping OTPs entirely.
Frequently Asked Questions
What happens if a company sends SMS without 10DLC registration?
Unregistered messages face high carrier drop rates (often exceeding 60%), steep per-message penalty fees, and eventual long-code suspension by carriers.
How long does 10DLC campaign approval take?
Brand registration is typically instantaneous, while campaign vetting takes 2 to 5 business days depending on whether third-party vetting is required.