Block a number directly from a text message

The fastest way to block a number on iPhone is to open the text thread from that sender, tap Edit in the upper left corner, then tap the red circle next to the conversation. A menu appears with the option Block this Caller — tap it, then confirm. That number can no longer text you, and any future messages from them go to a separate folder you will not see unless you look for it.

If you want to block the number without opening the full conversation, swipe left on the text thread itself (the preview that shows in your Messages list). A red Block button appears on the right side. Tap it once to block when ready.

Either method takes about five seconds. The blocked person will not receive a notification that you blocked them, but if they try to text you again, they will not see a delivery confirmation.

Block a number from the Phone app or Contacts

You can also block a number before you ever receive a text from it. Open the Phone app, tap Recents at the bottom, find the number you want to block, and tap the information icon (the small i in a circle) next to it. Scroll down and tap Block this Caller.

If the number is already saved in your Contacts, open the contact, tap Edit in the upper right, scroll to the bottom, and tap Block this Caller. This works the same way — the number is blocked from calling and texting.

Key Takeaways

  • Blocking a text sender takes seconds: open the message, tap Edit, tap the red circle, and select Block this Caller.
  • You can also swipe left on a text thread in your Messages list and tap the red Block button that appears.
  • Blocked numbers cannot text or call you, and their messages go to a hidden folder you will not see unless you search for them.
  • The blocked person does not get a notification, but they will not see a delivery confirmation when they try to contact you.
  • You can block a number from the Phone app, Contacts, or Messages — whichever is most convenient at the moment.

Where blocked messages go

When you block a number, text messages from that sender do not disappear from your phone — they move to a hidden folder. To see messages from a blocked contact, open Messages, tap Edit in the upper left, scroll down, and look for a section labeled Blocked or Blocked Contacts. Tap it to see all conversations from numbers you have blocked.

This matters because you can unblock a number at any time. Open that hidden folder, find the conversation, tap Edit, and select Unblock this Caller. Once unblocked, future messages from that number will arrive in your main inbox again.

Unblock a number you blocked by mistake

If you blocked someone by accident, the process to undo it is straightforward. Open the Messages app, tap Edit in the upper left corner, and scroll down until you see the blocked conversations section. Tap on the conversation from the number you want to unblock, then tap Edit again and select Unblock this Caller.

You can also unblock through the Phone app. Tap Recents, find the number, tap the information icon, scroll down, and tap Unblock this Caller. Either method restores the number to your normal contact list.

Block unknown senders and filter messages

If you receive unwanted texts from numbers you do not recognize, iPhone offers additional filtering options beyond blocking individual numbers. Open Settings, tap Messages, and turn on Filter Unknown Senders. This separates texts from people not in your contacts into a different tab, keeping your main inbox cleaner.

You can also enable iMessage Filtering in the same menu to filter messages from unknown senders in iMessage specifically. These filters do not block the messages — they just move them out of sight. If you want to block a sender permanently instead, you still need to block them individually using the steps above.

What blocking does and does not do

Blocking a number on iPhone stops text messages and calls from that sender, but it does not prevent them from leaving voicemails. If you want to block voicemails as well, you will need to contact your carrier — AT&T, Verizon, T-Mobile, or whoever provides your service — because voicemail filtering happens at the carrier level, not on your phone.

Blocking also does not prevent the person from reaching you through other apps like iMessage, WhatsApp, or social media. If someone is harassing you through multiple channels, you may need to block them in each app separately or adjust your privacy settings to limit who can contact you.

Frequently Asked Questions

Will the person know I blocked them?

No, they will not receive a notification. However, if they try to text you multiple times and never see a delivery confirmation, they may suspect they are blocked. The behavior is not obvious unless they are paying close attention.

Can I block a number that has not texted me yet?

Yes. If you have the number in your Contacts or in your recent calls, open it, tap the information icon, and select Block this Caller. You can block a number proactively before they ever contact you.

What happens to old messages from a blocked number?

They stay on your phone in the hidden blocked folder. Blocking does not delete past conversations — it only stops new messages from arriving in your main inbox. You can view them anytime by going to the blocked section in Messages.

Can I block a number temporarily and unblock it later?

Yes. Unblocking takes the same steps as blocking — find the conversation in your blocked folder, tap Edit, and select Unblock this Caller. There is no time limit or waiting period.

Does blocking work for iMessage and regular text messages?

Yes. Blocking a number blocks both SMS text messages and iMessages from that sender. If they use iMessage on an Apple device, they will not be able to reach you through that either.