The DNC (Do Not Call) registry: what it is and how to scrub against it

The Do Not Call (DNC) registry is one of the oldest and most familiar consumer-protection tools in US outreach — and one of the easiest to get wrong at volume. This guide explains what the registry is, what "scrubbing" actually means, and how it fits into a compliant outreach workflow. It is general information, not legal advice.

What the registry is

The National Do Not Call Registry is a database, maintained by the Federal Trade Commission, of phone numbers whose owners have asked not to receive telemarketing calls. Consumers add their numbers for free, and registration does not expire. Many states also maintain their own DNC lists.

The registry primarily targets telemarketing — sales and marketing outreach. Certain categories, such as calls to people with an existing business relationship or calls made with prior express consent, may be treated differently, but those exceptions are narrower than people assume and are easy to misapply. When in doubt, scrub.

What "scrubbing" means

Scrubbing is the process of comparing your outreach list against DNC data and removing (suppressing) any numbers that appear on it. A number that is on the registry is a number you generally should not be marketing to.

In practice, a good scrub covers more than just the federal registry:

• National DNC — the FTC's registry.
• State DNC lists — where applicable to your outreach.
• Your internal suppression list — anyone who has previously said STOP, opted out, or asked not to be contacted. This is often the most important list of all, because it reflects direct, explicit "do not contact me" signals.
• Litigator and known-complainer lists — many teams also suppress numbers associated with a history of complaints.

Why you have to re-scrub

The registry is not static. People add their numbers continuously, and numbers get reassigned to new owners. A list you scrubbed cleanly three months ago is not necessarily clean today. That is why scrubbing is a recurring control, not a one-time cleanup — ideally close to send time, so the data is fresh.

How this fits a compliant workflow

Scrubbing sits early in the pipeline, before anything goes out:

1. Upload or sync your list.
2. Scrub against DNC data and your internal opt-outs — suppress matches automatically.
3. Send only to the numbers that survive scrubbing.
4. Capture new opt-outs from replies and calls, and feed them back into your suppression list so the next send is cleaner.
5. Log everything — what was checked, what was suppressed, and when — so you can demonstrate the control if asked.

Fivra runs DNC lookups (via Apeiron, with local caching) before contacts are messaged or dialed, suppresses matches, and automatically adds STOP/opt-out replies to account-wide suppression. Every screen and suppression is written to append-only audit logs that export as CSV or JSON. The platform automates the mechanics; the policy decisions — which lists to scrub against, how to handle exceptions — are still yours.

Common mistakes

• Scrubbing once and reusing the list. DNC data changes; stale scrubs let registered numbers slip through.
• Forgetting the internal list. The registry does not include the person who texted you STOP last week. Your own suppression list does.
• Assuming an exception applies. Existing-business-relationship and consent exceptions are narrow — document why one applies before relying on it.
• No audit trail. If you cannot show what you scrubbed and when, the control does not help you.

FAQ

What is the National Do Not Call Registry?

It is a free FTC-maintained database of phone numbers whose owners have opted out of telemarketing calls. Registration does not expire, and many states keep their own lists as well.

What does it mean to scrub a list against the DNC?

Scrubbing compares your outreach list against DNC data and removes (suppresses) any registered numbers, so you only contact people you are permitted to reach.

How often should I scrub my list?

Regularly, and ideally close to send time. The registry changes constantly as people register numbers and as numbers are reassigned, so a fresh scrub before each campaign is the safest approach.

Does the DNC registry cover text messages?

Do Not Call rules are part of the broader framework that also governs texting, and marketing SMS intersects with both DNC and TCPA consent rules. Treat DNC scrubbing as a standard control for marketing SMS, not just calls.

What is an internal suppression list?

It is your own record of people who have opted out or asked not to be contacted — for example, anyone who replied STOP. Suppressing these numbers is essential, because they are not necessarily on the national registry.

Does Fivra scrub against the DNC automatically?

Fivra performs DNC lookups before contacts are reached and suppresses matches, and it adds opt-out replies to account-wide suppression automatically. You choose the policy; Fivra runs the checks and logs them.