10DLC registration guide for cold SMS (US carriers in 2026)
To send business SMS to US numbers you must register a 10DLC brand + campaign. Unregistered traffic is filtered 90%+. Here's the registration path and how to stay compliant.
Short answer: to send cold or business SMS to US numbers in 2026 you register two things with The Campaign Registry through your carrier — a 10DLC brand (your company) and at least one campaign (your use case). Skip it and the carrier filters 90%+ of your A2P traffic before it ever lands.
The registration path
- Register your brand — legal entity, EIN, address. Minutes of work; vetting clears near-instantly for most.
- Register a campaign — spell out the message flow, the opt-in method, and sample messages.
- Get your SID — the campaign SID binds to your sending number.
What gets you filtered
- No opt-in language, or no clear sender identity.
- "SHOP", loan, or other high-risk content on a low-trust campaign tier.
- Sending before your registration actually completes.
Autocloz won't let you send unregistered
Autocloz won't dispatch SMS through an account until its 10DLC brand and campaign SIDs are on file, and it honours STOP automatically as a cross-channel DNC. That's what keeps your numbers off the carrier blocklist.
> Start free — connect a Twilio, Telnyx, or Bandwidth number and Autocloz checks 10DLC before the first send.