Definition: 10DLC (10-digit long code) is a standard 10-digit US business phone number approved by carriers for application-to-person (A2P) text messaging.
A 10DLC number looks just like a local phone number. The difference is what sits behind it. Before a business can send texts from software (like reminders, alerts, or marketing), the number must be tied to a registered brand and campaign.
Sinch lays out the basic steps, and most providers follow a similar path:
Limits depend on your brand type. Twilio lists these examples:
| Registration type (Twilio) | Daily limit to T-Mobile |
|---|---|
| Sole Proprietor | 1,000 segments per day |
| Low-Volume Standard | up to 2,000 per day |
| Standard | based on Trust Score |
Reviewers check the website on your registration. It must be live, public, and clearly show the same business as your brand. Parked domains, pages under construction, and form-only pages are rejection reasons on Twilio. See the full 10DLC website requirements.
Related terms: A2P, TCR, Campaign use case, Short code, Toll-free verification
Not sure your website is ready for review? Run it through our free site checker, or see what a carrier-ready site includes.
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10DLC stands for 10-digit long code. Sinch describes it as a standard-looking business number approved by US operators for A2P messaging.
In most cases, yes. Vonage says website information became required for all brands except sole proprietors in 2025, and Twilio rejects campaigns when the website is missing, parked, or does not match the brand.
It depends on your provider. Twilio's quickstart says brands are typically approved within a few minutes, while campaigns typically take several days and currently 10 to 15 days due to volume.
No. A 10DLC number looks like a regular 10-digit phone number. A short code is a 5 or 6 digit number leased through the US Short Code Registry.
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