Use the built-in block feature for calls you recognize

The fastest way to stop a call is to block the number right when it rings. When a call comes in, swipe up from the bottom of your screen (or swipe down from the top on older iPhones), then tap the red circle with a line through it to decline. After you hang up, the call log shows that number. Tap the "i" icon next to it, scroll down, and tap Block this Caller. That number can no longer reach you by phone or FaceTime.

If you have already declined the call and closed it, open the Phone app, go to Recents, find the number, tap the "i" icon, and select Block this Caller from the menu. Once blocked, calls from that number go straight to voicemail and you get no notification.

You can also block a contact before they ever call. Open the contact in your Contacts app, tap Edit, scroll to the bottom, and tap Block this Caller. This works the same way — their calls go to voicemail silently.

Key Takeaways

  • You can block a number directly from a recent call by tapping the "i" icon and selecting Block this Caller.
  • Blocked callers go to voicemail and you receive no notification that they tried to reach you.
  • Unknown or private numbers can be filtered using Do Not Disturb or Focus modes to silence calls from people not in your contacts.
  • Spam filtering apps like Nomorobo or RoboKiller can identify and block robocalls before they reach your phone.
  • You can view and unblock numbers anytime in Settings under Phone, then Blocked Contacts.

Silence calls from unknown numbers using Focus modes

If you get many calls from numbers you do not recognize, blocking them one at a time is tedious. Instead, use a Focus mode to let through only calls from people in your Contacts. Open Settings, tap Focus, and create a new Focus (or edit an existing one like Do Not Disturb). Tap Allow Calls From and select Contacts Only. Now only people in your address book can ring through; everyone else goes to voicemail.

You can set this Focus to turn on automatically at certain times or locations. For example, set it to set up during work hours or when you arrive home. When it is on, the Focus icon appears at the top of your screen so you know the rule is active.

This method does not block specific numbers — it just silences unknown callers. If someone you know calls from a new number, they will not get through. You can always turn the Focus off temporarily if you are expecting a call from an unfamiliar number.

Use spam filtering to catch robocalls automatically

Apple's built-in filter catches some spam, but third-party apps are more aggressive. Apps like Nomorobo, RoboKiller, and Truecaller run in the background and identify robocalls before they reach you. They maintain databases of known spam numbers and use pattern recognition to flag suspicious calls. Many of these apps are free with optional paid tiers for extra features.

To use a spam filter, read it from the App Store, open it, and follow the setup steps. Most require you to give them permission to access your call history and contacts. Once active, they automatically block or silence flagged calls. You can review what they blocked in the app's log and adjust settings if needed.

These apps work alongside your manual blocks — they do not replace them. If a robocall gets through their filter, you can still block it manually using the method above.

Manage your blocked contacts list

To see all the numbers you have blocked, open Settings, tap Phone, then tap Blocked Contacts. This list shows every number and contact you have blocked. If you want to unblock someone, swipe left on their name and tap Unblock. They can then call you normally again.

There is no limit to how many numbers you can block on an iPhone. You can also block contacts across other Apple services — blocking someone in Contacts blocks them from calling, texting, and FaceTiming you all at once.

Block calls through your carrier

Your phone company offers its own spam-blocking tools, separate from what your iPhone does. Verizon has Call Filter, AT&T has Call Protect, and T-Mobile has Scam Shield. These services filter calls at the network level before they even reach your phone, which can catch spam your iPhone misses.

Most carriers offer a free version with basic filtering and a paid version with more features like reverse lookup and call recording. Check your carrier's website or call their customer service line to turn on their spam filter. Once active, it works automatically — you do not need to do anything on your phone.

Carrier filtering and iPhone blocking work together. You can use both at the same time for stronger protection.

Stop calls from hidden or private numbers

Some callers hide their number using *67 before dialing, which shows up on your phone as "Unknown" or "Private Number." You cannot block a hidden number the way you block a regular one because the number itself is not visible. Instead, use a Focus mode set to Contacts Only (described above) to silence all unknown callers at once.

If you need to receive calls from unknown numbers — for example, if a doctor's office might call from a blocked line — turn off the Focus temporarily. There is no way to block only hidden calls while allowing other unknown numbers through.

Frequently Asked Questions

Can someone tell if I have blocked them?

No. When a blocked person calls, they hear a normal ring and may hear a voicemail greeting, so they cannot tell for certain that you blocked them. They might suspect it, but your iPhone gives them no confirmation.

What happens to blocked voicemails?

Blocked callers can leave voicemail, but it goes to a separate folder called Blocked Messages in your Voicemail tab. You can listen to it anytime or delete it without hearing it.

If I block someone, do they see that I read their messages?

No. Blocking prevents calls and FaceTime, but it does not affect text messages or iMessage. If you want to block someone from texting too, you need to block them in the Messages app separately or block them in Contacts (which blocks all services at once).

Can I block calls from a specific area code?

Not directly on your iPhone. You would need a third-party app like Nomorobo or RoboKiller that lets you create custom rules. Most people find it easier to use Focus mode to silence all unknown numbers instead.

Will blocking someone delete our conversation history?

No. Blocking only stops future calls and messages. Your past texts, calls, and voicemails stay in your phone unless you delete them manually.