You can block a number directly from your Phone app, and blocked callers will hear a busy signal instead of ringing through to you
When you block a number on iPhone, that caller cannot reach you by phone or FaceTime, and their calls go straight to voicemail without your phone ringing. You do not need a third-party app — the blocking feature is built into iOS. The blocked caller does not get a notification that they are blocked; they simply hear a busy signal or their call goes to voicemail, which may or may not record their message depending on your voicemail settings.
Blocking works at the device level, meaning it only affects the iPhone you set it on. If you use multiple Apple devices (iPad, Mac, Apple Watch), you can turn on iCloud sync for blocked contacts so the block carries across all your devices at once.
Key Takeaways
- Open the Phone app, find the number or contact you want to block, tap the info button, and select "Block this Caller" — the whole process takes about 10 seconds.
- Blocked callers hear a busy signal and their calls go to voicemail, but they receive no notification that you blocked them.
- You can unblock a number anytime by going to Settings > Phone > Blocked Contacts and swiping left on the name.
- If you turn on iCloud sync for blocked contacts, the block will apply to your iPad, Mac, and Apple Watch automatically.
- Blocking a contact does not delete their number from your phone — it only prevents calls and FaceTime from that number from reaching you.
How to block a number from your recent calls
The fastest way to block a number is from your call history. Open the Phone app and find the number or contact name you want to block in your recent calls list. Tap the small circle with an "i" next to the number — this opens the contact details screen.
Scroll down to the bottom of that screen and tap "Block this Caller" in red text. A confirmation popup will appear asking if you are sure; tap "Block Contact" to confirm. The number is now blocked, and you will not receive calls or FaceTime requests from that number.
How to block a contact from your contacts list
If the number is saved in your Contacts app, you can block it from there instead. Open Contacts, find the person you want to block, and tap "Edit" in the top right corner. Scroll down to the bottom of their contact card and tap "Block this Caller" in red text, then confirm.
This method is useful if you want to block someone you know by name rather than searching through your call history. The contact itself stays in your phone — blocking only prevents their calls and messages from reaching you.
How to block a number that called you
If you receive a call from an unknown number and want to block it immediately, you can block it right from the incoming call screen. When the call comes in, tap "Decline" to reject it. After the call ends, go back to your recent calls, find that number, and follow the steps above to block it.
Alternatively, if you missed the call, the number will appear in your recent calls list with a red "Missed Call" label. Tap the info button next to it and select "Block this Caller."
How to see your blocked contacts and unblock a number
To view all the numbers you have blocked, open Settings and go to Phone. Scroll down and tap "Blocked Contacts" — you will see a list of every number or contact you have blocked on this device.
To unblock someone, swipe left on their name in the Blocked Contacts list and tap "Unblock." They will immediately be able to call you and send you FaceTime requests again. You can also tap "Edit" in the top left, select the contacts you want to unblock, and tap "Unblock" at the bottom.
How to sync blocked contacts across your Apple devices
If you own multiple Apple devices, you can turn on iCloud sync so that when you block a number on your iPhone, it automatically blocks on your iPad, Mac, and Apple Watch too. Open Settings on your iPhone, tap your name at the top, then go to iCloud. Make sure "Contacts" is toggled on — this syncs your blocked list across devices.
Once iCloud sync is on, any number you block on your iPhone will block on your other devices within a few minutes. If you unblock a number on one device, it unblocks on all of them. This is especially useful if you use your iPad or Mac for calls or FaceTime.
What happens when you block someone on iPhone
When you block a number, the caller cannot reach you by phone, FaceTime, or FaceTime Audio. Their calls go straight to voicemail without your phone ringing or showing a notification. They do not receive a message saying they are blocked — they simply hear a busy signal or their call goes to voicemail.
Text messages from blocked numbers do not come through to your Messages app, though some carriers may still deliver them to your voicemail. The blocked contact cannot see that you have read their messages or that you are online. From their perspective, it appears your phone is off or unavailable, not that you have blocked them.
Frequently Asked Questions
Can someone tell if I blocked them on iPhone?
No. A blocked caller hears a busy signal or their call goes to voicemail, but they receive no notification that you blocked them. They cannot tell the difference between a blocked number and a phone that is off or unavailable.
Do blocked calls go to voicemail?
Yes, blocked calls go to voicemail, though the caller may or may not be able to leave a message depending on your voicemail settings. Some carriers allow blocked callers to leave voicemail; others do not. You can check your carrier's policy or test it by having someone call from a blocked number.
If I block someone, will they still see my location in Find My?
If you were sharing your location with that person in the Find My app, blocking them does not automatically stop the sharing. You must manually turn off location sharing with them in Find My. Open Find My, go to the People tab, find their name, and tap "Stop Sharing My Location."
Can I block a number without saving it to my contacts?
Yes. You can block any number directly from your recent calls list without saving it as a contact. Tap the info button next to the number and select "Block this Caller." The number stays in your call history but is blocked from reaching you.
What if I block someone by accident?
You can unblock them anytime. Go to Settings > Phone > Blocked Contacts, find their name, swipe left, and tap "Unblock." They will immediately be able to call you again. There is no waiting period or confirmation needed from them.