The fastest way to block a number on iPhone

Open the Messages app, find the conversation from the number you want to block, and swipe left on it. A red Delete button appears, but keep swiping or tap the three dots on the right side of the message thread. You'll see a Block this Caller option — tap it, then confirm. That number can no longer text you.

If you're already in the conversation, tap the contact name or number at the top of the screen, scroll down, and tap Block this Caller. Either way takes about five seconds and works when ready.

Once blocked, texts from that number won't arrive, won't create notifications, and won't appear in your Messages app. The blocked person won't know they're blocked — their message will send normally from their end, but you'll never see it.

Key Takeaways

  • You can block a number directly from a text message by swiping left on the conversation and tapping Block this Caller.
  • Blocked numbers can still call you and leave voicemail, but their text messages will not arrive on your phone.
  • You can view your full block list in Settings under Phone or Messages, and unblock numbers at any time.
  • If you're getting spam texts from many numbers, turning on Filter Unknown Senders in Messages settings separates unknown numbers into a separate tab.
  • Blocking someone does not delete past messages from them — those remain in your conversation history unless you delete the thread.

Blocking from the Contacts app or Phone app

If the number is already saved in your Contacts, open the Contacts app, find the person, tap Edit in the top right, scroll to the bottom, and tap Block this Caller. This blocks them across text, calls, and FaceTime at once.

You can also block from the Phone app if they've called you. Open Phone, go to Recents, find the number, tap the info icon (circle with an i), scroll down, and tap Block this Caller. The result is the same — they're blocked everywhere.

Viewing and managing your blocked list

To see everyone you've blocked, open Settings, tap Phone, and scroll down to Blocked Contacts. You'll see the full list. The same list appears under Settings > Messages > Blocked Contacts — it's the same block list across both apps.

To unblock someone, open that list, swipe left on their name, and tap Unblock. Or tap Edit in the top left, tap the red minus sign next to their name, and tap Unblock. Once unblocked, they can text and call you again, and you'll see their messages normally.

Unblocking does not restore deleted conversations. If you deleted the thread before unblocking, you won't see the old messages when they text you again.

Filtering unknown senders instead of blocking individuals

If you're getting spam texts from many different numbers, blocking each one individually is slow. Instead, turn on Filter Unknown Senders in the Messages app. Open Messages, tap the three lines in the top left, go to Settings, scroll down, and toggle on Filter Unknown Senders.

This separates messages from people not in your Contacts into a different tab called Unknown Senders. Your main Messages tab shows only conversations from saved contacts. You can still read the unknown messages if you tap the Unknown Senders tab, but they won't clutter your main inbox or send notifications.

This is gentler than blocking because you're not preventing the messages from arriving — you're just organizing them. If someone you know texts from a new number, you'll still see it, just in the separate tab.

What blocking does and doesn't do

Blocking prevents text messages and FaceTime calls from reaching you. The blocked person's messages will not arrive, will not create notifications, and will not appear anywhere in your Messages app. If they try to call you, the call goes to voicemail, and they can leave a message — but you won't be notified of the voicemail.

Blocking does not delete past conversations. If you had a text thread with someone before blocking them, that thread stays in your Messages app. You can still read old messages from them, but new ones won't arrive. If you want to remove the conversation entirely, you have to delete the thread separately by swiping left and tapping Delete.

Blocking also does not prevent them from calling you — it only sends their calls to voicemail. If you want to block calls too, you're already doing it by blocking the number, since blocking works across calls, texts, and FaceTime.

Blocking business numbers and iMessage accounts

You can block business text numbers the same way you block personal ones — swipe left on the conversation and tap Block this Caller. The process is identical whether it's a person or a business.

If someone is texting you through iMessage (the blue message bubbles) instead of regular SMS, blocking still works the same way. Tap Block this Caller and they're blocked from iMessage, regular text, and calls. You don't need to block them twice.

Frequently Asked Questions

Will the person know I blocked them?

No. When they send a text, it will appear to send normally on their end. They won't receive a notification that they're blocked, and there's no way for them to know unless they try calling you and the call goes straight to voicemail repeatedly, or they notice you never respond.

Can I block someone but still see their old messages?

Yes. Blocking only stops new messages from arriving. Old conversations stay in your Messages app, and you can read them anytime. If you want to hide the conversation, delete the thread separately by swiping left and tapping Delete.

What's the difference between blocking and muting a conversation?

Muting silences notifications from a conversation but the messages still arrive and you can still read them. Blocking prevents the messages from arriving at all. Mute is for conversations you want to keep but don't want notifications from; blocking is for people you don't want to hear from.

If I block someone, will they still be able to call me?

Their calls will go straight to voicemail. They won't know they're blocked — the call will appear to ring normally on their end before going to voicemail. You won't see a missed call notification.

Can I block a number that's not saved in my contacts?

Yes. You can block any number, whether it's in your Contacts or not. Open the Messages app, find the conversation, swipe left, and tap Block this Caller. You don't need to save the number first.