What Is The Campaign Registry (TCR) and How Does It Work?

When you register for A2P 10DLC through Twilio or any other provider, your information ends up in one place: The Campaign Registry, universally shortened to TCR. Understanding what TCR is (and who the other acronyms in the chain are) makes the whole registration process far less opaque.

The registry the carriers built

The Campaign Registry is a third-party organization established at the direction of the major US carriers (AT&T, T-Mobile, and Verizon) to act as the single reputation and registration database for business messaging on 10-digit long codes. Before TCR, each carrier judged traffic independently and opaquely; now there is one shared record of who is sending what.

TCR stores two kinds of records:

• Brands, the verified identities of businesses that send messages: legal name, EIN, address, website, and a vetting score.
• Campaigns, the declared messaging programs attached to a brand: the use case, sample messages, opt-in process, and the phone numbers that will carry the traffic.

The cast of acronyms

CSP: Campaign Service Provider

You almost never talk to TCR directly. Your messaging provider, such as Twilio, Telnyx, Bandwidth, or Vonage, is registered with TCR as a CSP and submits brands and campaigns on your behalf. When you fill in Twilio’s Trust Hub forms, Twilio relays that data to TCR and returns TCR’s verdicts back to you.

DCA: Direct Connect Aggregator

After TCR records a campaign, a DCA, a company with direct connections into the carrier networks, manually or semi-automatically reviews it before carrier delivery is enabled. DCA reviewers are the human beings who open your website, read your privacy policy, and compare your sample messages against your stated use case. When campaigns are rejected, the rejection usually originates here. See why campaigns get rejected.

Vetting partners

TCR works with external vetting providers (such as Aegis Mobile) to score brand identity and, optionally, perform paid secondary vetting that can raise your throughput. More in our trust score guide.

What happens when you click "register"

1. Your CSP submits your brand data to TCR.
2. TCR’s vetting partner checks it against public and government records (IRS EIN records, business registries) and assigns an identity status and score, typically within minutes to a few days.
3. You (via your CSP) submit a campaign attached to the brand.
4. TCR records it and routes it to the DCA for review. This is the 1–4 week stage.
5. Once the DCA approves, carriers provision the campaign and your numbers can send registered traffic.

Why it matters to you

Practically, TCR’s existence has three consequences:

• Accuracy is everything. TCR checks your EIN and legal name against official records. A typo or a trade name where the legal name should be causes an automatic mismatch failure.
• Your history follows you. Brands and campaigns are shared records. A brand suspended for spam at one provider carries that history to the next.
• Reviews are by real reviewers. Because DCAs review campaigns against your public website, your site needs to display compliant opt-in language and a privacy policy before you submit, not after.

Twilio users never interact with TCR’s own portal; everything flows through Twilio Trust Hub. But knowing what happens behind the curtain helps you write registrations that pass the humans at the end of the chain.

Frequently asked questions

Can I register with The Campaign Registry directly?

Only messaging providers and large ISVs register with TCR directly as CSPs. Ordinary businesses always register through their provider (for example, via Twilio Trust Hub), which submits to TCR on their behalf.

Does TCR approve or reject campaigns?

TCR records campaigns and coordinates vetting, but the substantive review is performed by Direct Connect Aggregators (DCAs) and, ultimately, carrier policy. Most rejections you see originate from DCA review.

Is my TCR registration shared between providers?

Brand records exist independently of any one provider, and some providers support importing an existing TCR brand. In practice, most businesses re-register when they switch providers, but the underlying identity and reputation data persists at TCR.