What is 10DLC Registration?

10DLC stands for 10-Digit Long Code — the standard 10-digit phone numbers that businesses use to send application-to-person (A2P) text messages. 10DLC registration is the carrier-mandated process of registering your business identity and message campaigns with The Campaign Registry (TCR) before you can send business texts through these numbers.

Before 10DLC registration existed, businesses could send A2P messages through unregistered numbers — but carriers increasingly filtered these messages as spam. 10DLC registration was introduced to create a trusted ecosystem: registered businesses get better deliverability and throughput, while unregistered senders get filtered.

Registration is required by all major US carriers (AT&T, T-Mobile, Verizon). If your business sends SMS marketing or transactional texts through a 10-digit number in the US, you need to be 10DLC registered.

The 10DLC registration process has two parts: brand registration and campaign registration. Brand registration verifies your business identity — company name, EIN, address, and website. This is a one-time process. Campaign registration describes each messaging use case — what types of messages you'll send, sample content, opt-in methods, and expected volume.

Registration is submitted through your SMS platform or directly through The Campaign Registry (TCR). After submission, the carrier networks review and assign a trust score that determines your messaging throughput (messages per second) and daily limits. Higher trust scores get better throughput.

The process typically takes 1–5 business days for standard brands. Some industries (especially restricted categories like cannabis or firearms) may require additional vetting. Once approved, your 10DLC number is registered and you can send at your assigned throughput.

Without 10DLC registration, your business texts are increasingly likely to be filtered by carriers — meaning your messages simply don't reach customers. Registration is no longer optional; it's required for reliable SMS delivery.

The trust score assigned during registration directly impacts your throughput. A high trust score means you can send more messages per second and per day. A low score means rate limiting and potential filtering. Proper registration with accurate business information is essential for optimal deliverability.

For brands starting an SMS commerce program, 10DLC registration is one of the first setup steps. SMS platforms like AudienceTap handle the registration process as part of onboarding, ensuring your brand and campaigns are properly registered before you start sending.