A2P Messaging: 10DLC and Toll-Free SMS
Horizon Communications Group provides A2P messaging support for carriers, CLECs, CPaaS and UCaaS platforms, and resellers. Founder-led since 1998, we support 10DLC brand and campaign registration and toll-free SMS enablement, so the messaging behind your product is registered the right way.
What is 10DLC and A2P messaging?
A2P, or application-to-person, messaging is text sent from software to people: notifications, alerts, one-time codes, and similar traffic. In the US it runs on two rails. 10DLC covers A2P messaging on standard 10-digit long codes and requires brand and campaign registration.
Toll-free SMS runs ontoll-free numbersand requires toll-free verification. Horizon supports the registration and verification behind both rails. We facilitate the process; we are not the registry, a CSP, or an aggregator, and we do not guarantee throughput or approval.
Two A2P messaging rails
10DLC
A2P messaging over standard 10-digit long codes. Sending requires registering your brand and each campaign (use case). Horizon provides 10DLC brand and campaign registration support to help you prepare and submit those registrations.
Toll-Free SMS
Messaging on toll-free numbers, which calls for toll-free verification before sending A2P traffic. Toll-free SMS rides on your existing toll-free numbers, so it pairs with the numbers Horizon already provisions.
Why providers handle 10DLC and toll-free SMS through Horizon
Founder-led since 1998
You work with a desk that has guided providers through telecom programs for 28 years, not a form alone.
Registration support, both rails
We support 10DLC brand and campaign registration and toll-free verification, so both messaging rails are handled in one place.
Prepared, complete submissions
We help you assemble accurate brand details, use cases, and consent handling so registrations are submitted complete the first time.
Kept current as you grow
As campaigns and use cases change, we help keep your registrations aligned so your A2P traffic stays in good standing.
How 10DLC and toll-free SMS support works
- 01
Consult
We review your messaging use cases, expected volumes, and whether they fit 10DLC, toll-free SMS, or both.
- 02
Register and enable
We help you prepare and submit 10DLC brand and campaign registration, and support toll-free verification, with the appropriate parties for review.
- 03
Monitor and optimize
We help keep registrations current as use cases change and support consent and opt-out handling so your traffic stays compliant.
Who A2P messaging support is for
- Carriers
- Offer A2P messaging to customers with registration support handled alongside voice.
- CLECs
- Add messaging to subscriber numbers with 10DLC and toll-free SMS guidance in one place.
- CPaaS and UCaaS providers
- Back your messaging product with brand and campaign registration support for your customers.
- Enterprises
- Register the brand and campaigns behind your notifications and alerts the right way.
- Resellers
- Resell A2P messaging under your own brand with registration support behind you.
10DLC FAQ
What is 10DLC?
10DLC, or 10-digit long code, is the framework for sending A2P (application-to-person) messaging over standard 10-digit numbers in the US. It requires registering your brand and the campaigns, or use cases, you send, so carriers can apply consistent rules to A2P traffic on long codes.
What is 10DLC registration?
10DLC registration is the process of registering your brand and each messaging campaign before sending A2P traffic on long codes. Horizon provides 10DLC brand and campaign registration support: we help you prepare and submit the registration to the appropriate parties for review. We facilitate the process rather than acting as the registry.
What is 10DLC compliance?
10DLC compliance means following the messaging rules tied to your registered brand and campaigns: registering accurate use cases, handling consent and opt-out correctly, and keeping message content consistent with what you registered. Staying compliant keeps your A2P traffic in good standing with carriers.
How long does 10DLC registration take?
Timelines depend on brand and campaign vetting and on how complete your submission is. Some steps clear quickly while others take longer when additional review is needed. We help you submit a complete registration to avoid avoidable delays, but the vetting timeline is set by the reviewing parties, not by Horizon.
What do I need for 10DLC registration?
Typically your legal business details for the brand, the messaging use cases you intend to run, sample message content, and your opt-in and opt-out handling. We help you assemble and submit these for brand and campaign registration so the submission is complete.
Getting started with 10DLC or toll-free SMS?
Tell the desk your messaging use cases and volumes. We will help you register the brand and campaigns and enable the right rail.