Get Reliable Spam Protection with Blacklist Number Features

Q: How do I blacklist phone numbers?

Go to Account > Settings > Blacklist , click Change , add the number, select area code and call type, then save.

Take control of your calls by blocking unwanted numbers instantly. With CloudTalk’s call blacklist number feature, you can stop spam calls in their tracks and ensure only legitimate calls reach your team—boosting productivity without the hassle.

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Stop Unwanted Calls, Stay Focused

Block Over 55% of Spam Calls

Blacklist protection instantly blocks inbound and outbound calls from spam, robocalls, and telemarketers—keeping your team focused on what matters.

Boost Productivity by Filtering Irrelevant Calls

Filtering out irrelevant and nuisance calls means agents waste less time screening or handling unwanted conversations, so your team stays available for high-value interactions.

Strengthen Security and Protect Sensitive Lines

Stop fraud, phishing, and spoofing attempts. Combined with features like STIR/SHAKEN, blacklist protection reinforces trust and compliance.

We’ve helped thousands of global companies

Case studies featuring customers who are building faster.

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Revolutionizing Revolut’s Efficiency and Saving 40+ Hours

“Thanks to CloudTalk’s reliability, we could improve sales teams’ performance and close more deals than we could have ever imagined.”

Jamie Devlin
Head of Operations

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Increasing productivity for 200 customer support agents

“With CloudTalk’s Analytics I now get to see every step of the way. We can find discrepancies and gain a much better understanding of our teams.”

Nelly Donnelly
Service Delivery Manager

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Delivering success for Glovo’s customer support team

“CloudTalk improved our team’s cost and efficiency. The script feature allows us to lead the calls in a much more systematic way.”

Yohann Bensadoun
Global Supply Growth

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Scaling outbound calls for MyHeritage 158 sales agents

“We have seen a significant increase in our outbound call volume. We can now reach out to more prospects and customers than ever before.”

Elay Sasson Call
Center Manager

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What Is a Blacklist Number?

A blacklist number is a phone number added to your call block list to prevent unwanted, spam, or fraudulent calls from reaching your business. These numbers can be blocked manually or automatically by systems detecting suspicious or irrelevant communications.

By keeping these calls out, you protect your team from distractions, avoid potential risks, and stay focused on the conversations that actually matter.

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How Does Blacklisting a Phone Number Work?

When you blacklist a phone number, the system blocks calls from that number based on your chosen settings—inbound, outbound, or both. Numbers may be blocked by hand or via automated workflows that identify spam and irrelevant contacts.

These blacklisted numbers are stored in your call blacklist, allowing you to easily review, update, or remove them as needed.

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BENEFITS OF BLACKLIST NUMBER

Keep Your Lines Clear,
Keep Your Business Moving

Make Life Easier for Your Customers

Less spam means shorter queues and faster answers for real customers. Agents stay available for genuine conversations, which keeps the service smooth and frustration low.
The result? Happier customers and a better overall experience on every call.

Get Clean, Reliable Call Data

Unwanted calls distort your reports and waste time. Blocking them keeps your analytics accurate and lets you focus resources where they’ll actually make a difference.
Your decisions will be based on real data, not noise from spam traffic.

Stay in Control of Every Call

Choose which numbers to block for inbound, outbound, or both. Update blacklists manually or automate it based on call outcomes, so no one wastes time on pointless calls. You decide who gets through, and adjust your call flow as your needs change.

Cut Interruptions Before They Reach You

When a blacklisted number dials in, the system disconnects it instantly. No voicemails, no wasted minutes—just a clean, distraction-free space for your team. It keeps your agents focused, your queues clear, and your day running smoothly.

How to Set Up a Blacklist Number With CloudTalk?

In your CloudTalk Dashboard, go to Account → Settings → Blacklist.
Click Change, then hit +Add Phone Number in the top right corner.
Select the country code and enter the number in basic format (e.g. 949111222).
Choose whether to block it for inbound, outbound, or both types of calls.
Click Save—and that number won’t bother your team again.