10DLC Registration Guide 2026: Everything US Businesses Need to Know

What Is 10DLC?

10DLC (10-digit long code) is the standard for Application-to-Person (A2P) SMS sent using 10-digit US phone numbers. Since February 2025, all A2P SMS sent to US mobile numbers from 10-digit long codes must be registered with The Campaign Registry (TCR) — or they will be blocked by major US carriers including AT&T, T-Mobile and Verizon.

Why Did 10DLC Become Mandatory?

The US carriers introduced 10DLC to combat spam and smishing (SMS phishing) that was rampant on long code routes. By requiring businesses to register their brand and message types with TCR, carriers can verify legitimate senders and block unregistered traffic.

How to Register for 10DLC with BulkSMSHub

1. Brand Registration: Submit your legal business name, EIN (for US businesses), vertical and company website to TCR. Cost: $4 one-time fee.
2. Campaign Registration: Describe your SMS use case (marketing, OTP, customer care etc), provide sample messages and confirm compliance attestations. Cost: $10/month per campaign.
3. Carrier Pre-vetting (optional but recommended): Pre-vetting with AT&T and T-Mobile reduces filtering and increases throughput. BulkSMSHub handles this automatically for Business and Enterprise customers.

BulkSMSHub handles the complete 10DLC registration process for customers. Typical turnaround: 5-7 business days for standard registration. Contact our sales team to get started immediately.