How To Block Unknown Numbers In WhatsApp

Random messages from strangers can be quite annoying, especially if you receive them frequently. So if you’re tired of receiving random messages from unknown numbers on WhatsApp, there’s a way to stop them from bothering you in the future. What you can do is block the user, whether they’re on your contacts or not, from messaging, calling, or receiving any status updates on the platform.


WhatsApp is a messaging service that doesn’t have a username feature to sign-in to their account. Instead, the platform uses phone numbers as a form of verification for users. With this identification method, people

While this feature allows you to easily sign-in to the platform, it comes with some disadvantages as well. For instance, any stranger that have access to your phone number can simply search you on the app and send you a message anonymously.

Although one or two messages from strangers might be bearable, there are times when things can be quite annoying. If that’s the case, then there’s something you can do to prevent these people from messaging, calling, or even seeing your profile and status updates.

With just a few taps, you can block contact or an unknown number from contacting you through WhatsApp. Just remember even though they won’t get a notification, there’s no guarantee that the person won’t realize that you blocked them on the platform.

So if that’s fine with you, we have here a quick tutorial on how to block unknown numbers on WhatsApp. And even if you accidentally saved the number on your contacts list, don’t worry, since we got you covered.

How to prevent an unknown number from contacting you through WhatsApp

Once you receive a message from an unknown number, you can choose whether to add or block them from your contacts list. So if you see and realize that the message is spam or it isn’t from someone you know, you can opt to block the number to prevent it from bothering you in the future.

To help you, here’s our quick tutorial on how to block strangers from your phone and computer:

WhatsApp on Android

  1. Under the Chats tab, select the chat thread from the unknown number.

  2. Tap the “Block” option just below the sender’s information on the chat.

  3. Select “BLOCK” or “REPORT and BLOCK” to confirm your decision.

If you choose to report the number as well, WhatsApp automatically receives the recent messages sent to you by the person. The platform may ban the person involved if there sufficient evidence that the user violated their Terms of Service.

WhatsApp desktop and web apps

  1. On your Chats list, select your conversation thread with the unknown number.

  2. At the top right corner of the chat, click More options (three-dot icon) > Contact Info. You can also click the person’s name on the subject to open their contact details.

  3. Scroll down and click Block.

  4. Click BLOCK to confirm your decision.

    Note: This method above also works with known numbers on your contacts list.

Once you block a contact or number, you won’t receive any messages, notifications, calls, or updates, whether you’re using a phone or the web app. In addition, the blocked person won’t see any of your activity status and profile changes on the platform.

How to block a contact on WhatsApp

If you accidentally saved the number on your contacts list, you can directly stop the person from messaging you without deleting them from your contacts. For those using Android, head over to the contact’s information page, and you can block the number from there.

Here’s the step-by-step guide on Android:

  1. Under the Chats tab, open the chat between you and the contact that you want to block.
  2. Tap the person’s name on the upper side of the screen to access the contact information.

  3. Scroll down and tap Block.

  4. Confirm your decision by selecting BLOCK or “REPORT and BLOCK.”

Take note that blocking a person on WhatsApp won’t delete them from your contacts list. So if you want to erase their number on WhatsApp, you have to head over to your address book and delete the contact manually from there.


To block stop an unknown user from contacting you on WhatsApp, all you have to do is open the message or chat thread from the stranger and choose to block the number instead of adding it to your contacts. Aside from that, you can also head over to the contact’s information page and select “Block” from the options.

When you choose to block a number, you won’t receive any messages, calls, or status updates from the contact involved. It’s the perfect feature against spammers and annoying strangers.

While you can always unblock a number, you can’t receive or view any messages or notifications from the time when you blocked the number. So think twice before you decide to use the block feature on WhatsApp.

We hope that this guide helped you stop strangers from bothering you on WhatsApp. For more tips, tricks, and guides, hit the bookmark button, and don’t forget to visit us regularly for daily updates.