How to Block No Caller ID Calls on iPhone

The blog post by Raymond Oglesby offers tips for iPhone users on how to handle blocked or unknown calls. Among the suggestions are enabling the block unknown callers feature on iOS, which could also inadvertently block legitimate calls. Outgoing calls can be anonymized by dialing *67 before the number. A distinction is made between No Caller ID (intentionally blocked by the caller) and Unknown Caller (Caller ID was provided but not recognized). The post also answers FAQs about related subjects.

RAYMOND OGLESBY @RaymondOglesby2
October 17, 2023

This is for the iPhone with iOS 13 +. Screenshots are from iPhone 14 Pro running iOS 16+

When your phone rings and the Caller ID is blocked, or it’s an unknown caller, it’s pretty frustrating. Especially with repeat unknown calls. If you are ready to stop those annoying spam calls and unmask the Caller ID behind them, these are some of the best methods to reveal unknown numbers.

  • There are two important distinctions you should know. No Caller ID and Unknown Caller are two different things.
  • No Caller ID means that the caller intentionally blocked their ID from you. On the contrary, an Unknown Caller means the Caller ID was not recognized even though it was provided.
  • The best way to handle this is to turn on the option to block unknown callers on iOS. It sometimes blocks real callers, but it’s a good balance between being inundated with spam calls all day.

If you are looking to hide your phone number when making outbound calls, you do not need to even fiddle with your phone’s settings.

Simply dial *67 followed by the phone number you are trying to call. When you do this, it tells your carrier not to show any Caller ID for that call.

An example of the phone number string to dial would be *67-555-555-5555.

First, open the Settings app on your iPhone. Refer to the below image:

Block Call 1
Accessing Settings

Next, scroll down to the Phone option and tap on it. See the below image:

Block Call 2
Accessing Phone option

Now, scroll down to the Silence Unknown Callers option. See the following image:

Block Call 3
Accessing the Silence Unknown Callers option

Next, toggle its switch to the ON position. Refer to the below image:

Block Call 4
Turn the option ON

All calls without a Caller ID will be automatically blocked from your phone. Remember, real numbers and callers can also be affected by this, and customer service-based calls frequently are a target. We recommend you check your voicemails and missed calls list.

Can you find out a no Caller ID number?

If you receive a call without any Caller ID, the caller has deliberately blocked their phone number from showing up. There’s no way to find out the number if the call was purposely blocked.

What does *57 do on a phone?

The service code *57 activates malicious caller identification. This is an upcharged fee service offered by some phone company providers. *57 should be dialed immediately after receiving a call from a number with no Caller ID. When you do so, it records the metadata of the malicious call to aid law enforcement investigations.

How do you call a number with a blocked ID back?

You can not call back a number that calls you with a hidden ID. If you miss a call from these numbers, you must wait till they call you back. Their hidden Caller ID prevents you from calling back if you do not have their number.

Will my telephone provider reveal an Unknown Caller’s ID to me?

It is against the law for your mobile carrier to reveal information about another user to you. They can only do that if you can prove that you are in danger or feel threatened. If you are going to request details like that from your mobile carrier, you must have enough evidence to back up your claim and most likely a police report.

Disclaimer

Technology is always changing and rarely is there static tech for smartphones and desktops. Thus, the contents of this post are only valid at the time of writing. Blog posts older than six months may have directions incompatible with your device or OS. Hopefully, older post content will continue to work as advertised. Thank you for reading TechSavvy.Life for Technology at Work For You.

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How to Stop Unknown Callers on iPhone

Tired of getting robocalls all day long on your iPhone? Your iPhone lets you silence the harassment by turning on a feature called Silence Unknown Callers in Settings.

RAYMOND OGLESBY @RaymondOglesby2
January 26, 2022

Tired of getting robocalls all day long on your iPhone? Your iPhone lets you silence the harassment by turning on a feature called Silence Unknown Callers in Settings. Let’s explore this nifty feature.

This is for the iPhone

Dilbert and Breathing
Copyright Scott Adams, Inc./Distributed by Universal Uclick for UFS

What is an Unknown Caller

On your iPhone, an unknown caller is someone who is not in your Contacts list, which is an address book stored on your device that can be accessed through the Phone or Contacts apps. If you have called a number recently, your iPhone will not consider that number an unknown caller if they call you back.

Apple includes a feature with iOS 13 and up that allows you to silence rings and notifications from unknown callers, which is covered below. This does not include numbers you have called recently. Otherwise, if you want a caller not to be considered unknown (and thus not be silenced) you will need to add the number to your iPhone’s Contacts.

How to Silence Unknown Callers

First, to silence these calls, open Settings on your iPhone by tapping the grey gear icon on your Home screen. Refer to the below image:

Callers 1
Accessing Settings

Next, in Settings, scroll down and tap Phone. See the below image:

Callers 2
Accessing Phone option

Now, in Phone settings, tap Silence Unknown Callers. See the following image:

Callers 3
Accessing Silence Unknown Callers option

Next, in Silence Unknown Callers settings, enable the switch beside Silence Unknown Callers to ON. Refer to the below image:

Callers 4
Enable Silence Unknown Callers

Now, exit Settings. The next time you get a call from an unknown number, you will not hear a ring or a notification sound. The call will be sent to voicemail, and it will appear in your recent calls list in the Phone app. You may still get a notification if the caller leaves a voicemail.

If you are expecting an important call from an unknown number in the future, open

Settings > Phone > Silence Unknown Callers

and then switch Silence Unknown Callers to OFF. Incoming calls will no longer be silenced.

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Please feel free to leave a comment. I would love to hear from you. Do you have a computer or smart device tech question? I will do my best to answer your inquiry. Just send an email to contact@techsavvy.life. Please mention the device, app, and version you are using. To help us out, you can send screenshots of your data related to your question.

The author’s Vietnam eBook on the Battle for Tra Bong Vietnam: Events and Aftermath