The simplest way to block a number on Android

Open the Phone app on your Android device. Find the number you want to block — either in your call history, your contacts list, or a text message thread. Press and hold the number until a menu appears, then tap Block number or Block contact. The exact wording depends on your phone's manufacturer, but the option will be there. Once blocked, that number cannot call or text you, and you will not see their messages or missed calls.

If you do not see the number anywhere on your phone yet, you can still block it. Open the Phone app, tap the three-dot menu at the top, select Settings, then Blocked numbers or Block list. Tap the plus sign or Add, then type in the number you want to block. Save it, and the number is blocked when ready.

Blocked numbers do not receive a notification that you have blocked them. Their calls go to voicemail as if your phone is off, and their text messages disappear without a trace on your end. You will not see any record of their attempts to reach you unless you go back into your blocked list.

Key Takeaways

  • You can block a number directly from your call history, contacts, or text messages by pressing and holding it and selecting the block option.
  • If you do not have the number saved, open the Phone app settings and manually add the number to your block list.
  • Blocked callers cannot reach you by phone or text, and their attempts do not show up in your call or message history.
  • Different Android manufacturers use slightly different names for the block feature, but all Android phones have this function built in.
  • You can unblock a number at any time by going back to your blocked list and removing it.

Blocking a number from your call history

This is the fastest method if the number has already called you. Open your Phone app and look at the Recents or Call History tab. Scroll through until you find the number or contact name you want to block. Press and hold it — do not just tap once, but hold your finger on it for a second or two until a menu pops up.

The menu will show several options. Look for Block number, Block contact, or sometimes Add to block list. Tap whichever option appears. Some phones also show a trash icon or delete option in the same menu — that only deletes the call from your history, not the number itself, so make sure you tap the block option instead.

After you tap block, the number is blocked when ready. If you want to confirm it worked, you can go back into your Phone app settings and look for Blocked numbers or Block list — the number should appear there.

Blocking a contact or a number from a text message

If someone is texting you and you want to block them, open your Messages app and find the conversation. Press and hold the contact name or phone number at the top of the thread. A menu will appear with options including Block or Block contact. Tap it, and the number is blocked.

You can also block from within the conversation itself on some phones. Open the message thread, tap the three-dot menu at the top right, and look for Block or Block number. The exact location varies by phone, but the option is usually in that menu.

If the person is already in your contacts, blocking them this way blocks the contact itself, so you will not hear from them no matter which number they use. If it is just a phone number with no contact name attached, only that specific number gets blocked.

Manually adding a number to your block list

If you want to block a number before they ever call or text you — perhaps someone gave you a number to avoid — you can add it directly to your block list. Open your Phone app and tap the three-dot menu or settings icon, usually at the top right of the screen. Look for Settings, Call settings, or Blocked numbers.

Once you are in the blocked numbers section, tap the plus sign, Add, or Create button. Type in the phone number you want to block, including the area code. Some phones let you add a note about why you blocked it, which can be helpful if you block many numbers. Tap Save or Confirm, and the number is blocked.

The number does not have to be in your contacts for this to work. You can block any phone number, even one you have never seen before. This is useful for blocking known spam numbers or numbers you find online that are associated with scams.

Where to find your block list and unblock numbers

To see all the numbers you have blocked, open your Phone app and go to Settings. Look for Blocked numbers, Block list, Call blocking, or Do Not Disturb — the exact name depends on your phone's manufacturer. Tap it, and you will see a list of every number you have blocked.

If you want to unblock someone, find their number in the list and tap it. A menu will appear with an Unblock option. Tap it, and the number is unblocked when ready. They can now call and text you again, and you will see their calls and messages in your history as normal.

Some phones also let you block numbers through your contacts app. If you open a contact and tap the three-dot menu, you might see a Block contact option there. This blocks all phone numbers associated with that contact.

What happens when you block a number

When you block a number on Android, the blocked caller cannot reach you by phone or text message. If they call, their call goes straight to voicemail, but they will not hear a busy signal or a message saying they are blocked — it will sound like your phone is off or you are not available. If they text you, the message is not delivered to your phone, and they will not receive a delivery confirmation.

You will not see any notification that a blocked number tried to contact you. Their calls do not appear in your call history, and their texts do not show up in your messages. The contact is completely hidden from your phone's view, as if they never tried to reach you at all.

If you want to see whether a blocked number has tried to contact you, you have to go into your Phone app settings and look at your blocked list. Some phones show a count of how many times a blocked number has tried to call, but this information is not pushed to you — you have to look for it yourself.

Blocking spam and robocalls

If you are getting calls from numbers that change every time, or calls from obvious spam sources, blocking individual numbers one at a time can feel endless. Most Android phones have a Call Filter, Call Screen, or Spam Protection feature built in. Open your Phone app settings and look for these options.

These features automatically block known spam numbers and robocalls before they reach you. You can usually turn on a setting that blocks calls from unknown numbers entirely, though this means legitimate callers you do not have saved in your contacts will also be blocked. Some phones let you allow calls from your contacts only, which is a good middle ground.

If your phone does not have a strong spam filter built in, you can read a third-party app from the Google Play Store that specializes in blocking spam calls. Popular options include TrueCaller, RoboKiller, and Nomorobo. These apps use databases of known spam numbers and can block calls before your phone even rings.

Frequently Asked Questions

Can a blocked number tell that I blocked them?

No. When a blocked number calls you, they hear a voicemail greeting or a message saying your phone is unavailable — the same thing they would hear if your phone was off. They do not receive any notification that you blocked them. Text messages from blocked numbers straightforward fail to deliver, with no explanation sent back to the sender.

What if I block someone by accident?

Go to your Phone app settings and find your blocked numbers list. Find the number you blocked by mistake and tap it. Select Unblock, and the number is unblocked when ready. They can call and text you again, and you will see their calls and messages in your history from that point forward.

Can I block a number that keeps changing?

If the same caller is using different numbers each time, blocking individual numbers will not stop them. Instead, use your phone's spam filter or call screening feature. Open your Phone app settings and enable Call Filter, Call Screen, or Spam Protection. You can also set your phone to block all calls from unknown numbers, though this will also block legitimate callers you do not have saved.

Will blocking a number stop them from seeing my location or other information?

Blocking a phone number only stops calls and text messages. It does not prevent someone from finding your location through other means, such as social media or a shared account. If you are concerned about your safety, blocking is one step, but you may also need to adjust your privacy settings on social media and other apps, or contact local authorities.

Can I block a number on Android if I do not have it saved in my contacts?

Yes. You do not need to save a number in your contacts to block it. You can block any phone number by going to your Phone app settings, finding your blocked numbers list, and manually typing in the number. The number will be blocked whether or not it is in your contacts.