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Get Reliable Spam Protection with Blacklist Number Features
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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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.

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.

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.
Frequently asked questions
Everything you need to know about the product and billing.
What is a blacklist number?
A blacklist number is a phone number blocked to prevent calls from reaching your system.
Is it 67 or 69 to block your number?
Dial *67 before a number to block your caller ID for that call; *69 calls back the last number and does not block your number.
How do I check my blacklist number list?
Access your blacklist contacts through CloudTalk’s Dashboard or API to see all blocked numbers.
What happens if someone blacklists your number?
Calls from your number will be blocked or sent to voicemail, depending on their blocking settings.
What is the Phone Number Blacklist?
A list where you add numbers you don’t want to call or receive calls from. Calls between both sides are blocked.
How do I blacklist phone numbers?
Go to Account > Settings > Blacklist, click Change, add the number, select area code and call type, then save.
What happens when I blacklist a phone number?
The caller hears a message saying your number’s disconnected, and the call ends without voicemail.
How many phone numbers can I blacklist?
There’s no limit—you can blacklist as many phone numbers as you need in your CloudTalk account.
How to blacklist a phone number?
In CloudTalk, go to Account > Settings > Blacklist, click Add Number, enter the number, select call type, and save to block it.



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