- You can block a contact on WhatsApp by tapping on their name and hitting the Block button.
- Chats with unsaved contacts and businesses have a persistent Block button that’s easy to access.
- Even if you block a contact, they can message you on a common group chat.
Block WhatsApp Numbers Saved in Contacts
Before we tell you how to block WhatsApp messages from unknown numbers, you might also want to know how to block WhatsApp contacts. It’s simple, but for those unaware, here’s how it’s done.
Step 1: Open the chat window of the contact you want to block. Tap on the name at the top.
Step 2: Select the Block button at the bottom. You can unblock the contact again using the same button that would now say Unblock.

Tip: How to message yourself on WhatsApp
Block Unknown WhatsApp Numbers Not in Contacts
If you’ve received a message from an unknown number, here’s how to block them.
Step 1: Open the chat window in WhatsApp. Tap on Block at the bottom.
Step 2: Check the box for Report contact if it’s a spammy message or an attempted scam. If it’s a friend you want to avoid, simply Block them.

Note: When reporting a WhatsApp number, the number is added to a Watchlist maintained by WhatsApp. If the number is reported multiple times by many users, it will be banned temporarily. Think of it as a warning to curb spam. WhatsApp may ban the number permanently at its sole discretion.
How to Block Businesses From Sending You Messages on WhatsApp
Of late, several businesses have started sending order updates and promotions on WhatsApp. While those discount codes can be helpful at times, most messages are spam. So, here’s how to block a business on WhatsApp.
Step 1: Open the chat window where you’ve received the message from a business. At the bottom, you will see two options: Block and Continue . You know which option to pick.
Step 2: Enter the reason for blocking the business. You can also choose to report. Once done, hit the Block button.

If you’ve blocked contact on WhatsApp, they cannot directly message you again. However, they can still message you in a common group.
If you block a contact on WhatsApp, both calls and messages from them will be blocked.
You must unblock a contact if you wish to message them again.