10DLC (10-Digit Long Code) is the framework U.S. wireless carriers use to vet businesses before allowing them to send text messages to customers at scale. If your business texts customers — appointment reminders, order updates, marketing — you almost certainly need to register.
Carriers separate text traffic into two categories: P2P (person-to-person, like a text between two friends) and A2P (application-to-person, like a business sending order confirmations). A2P traffic is held to a much higher bar, because it's the category spam and phishing texts come from. 10DLC is the mechanism that lets a legitimate business prove it isn't one of those.
The Campaign Registry (TCR) is the shared database AT&T, T-Mobile, and Verizon all pull from. Registering a brand (your business entity) and a campaign (your specific use case — order notifications, marketing, 2FA, etc.) involves submitting your legal business details and, critically, a working website that backs up what you're claiming to send. Reviewers cross-check the campaign description against the website's actual content.
A campaign is commonly rejected or later suspended for a missing:
10dlc.us generates a complete, carrier-compliant business website — homepage, contact form, Privacy Policy, and Terms of Service, with the SMS disclosures and mobile-data language built in — from a plain-English description, and deploys it live in minutes. That gives you the website TCR and your carrier or CPaaS provider expect to see, without hiring a developer or reading through carrier documentation yourself. See the builder or the product FAQ for plan details.
10DLC stands for 10-Digit Long Code — a standard local phone number format that U.S. wireless carriers approved for Application-to-Person (A2P) business texting, as an alternative to short codes. "10DLC registration" refers to the brand and campaign vetting process carriers require before they'll deliver that traffic.
The major U.S. carriers (AT&T, T-Mobile, Verizon) require it for any business sending application-to-person SMS or MMS, whether through a CPaaS platform (Twilio, Bandwidth, etc.), a CRM, or a marketing tool. Registration is submitted through The Campaign Registry (TCR), which carriers use as the shared source of truth for vetted brands and campaigns.
Unregistered or unverified traffic is throttled, filtered, or blocked outright by carrier spam-detection systems, and can result in the sending number being blocklisted. Registration is what allows legitimate business messages to reach customers reliably.
TCR and the carriers use a business's website to verify that the brand is real and that its messaging use case matches what it claims. The website must be publicly reachable and contain specific compliance elements — an SMS opt-out disclosure near any messaging sign-up, a Privacy Policy that addresses mobile information, and Terms of Service — or the campaign can be rejected or later suspended.
At minimum: a live Privacy Policy stating that mobile opt-in data and phone numbers are not shared with third parties for marketing purposes, Terms of Service, and an SMS consent disclosure (opt-in language, message frequency, and 'reply STOP to opt out') placed directly next to any form that collects a phone number.