How to Hide Your Phone Number When Calling

What does hiding your phone number actually do?

Hiding your number withholds your caller ID from the person you are calling, so their screen shows Private, Blocked or No Caller ID instead of your digits. The call itself is completely normal in every other way.

It does not make you anonymous. Your carrier still records the call, emergency services still receive your number, and businesses using certain call-handling services may still capture it. Treat the feature as privacy from the person you are ringing, not as invisibility.

How do you hide your phone number for one call?

1. Open the phone dialler as normal.
2. Type the caller ID blocking prefix used by most US carriers, which is star six seven, entered as *67.
3. Immediately type the full number you are calling, area code included, with no space or pause after the prefix.
4. Press call. The whole string is dialled as one sequence.

This affects only that one call. The next call you place shows your number again. It works from most US mobile and landline services, and it is the right tool when you want to hide your number occasionally rather than always.

If you save the prefix in front of a contact's stored number, every call to that contact goes out hidden, which is a useful trick and an easy one to forget you set up.

How do you hide your number on an iPhone for every call?

1. Open Settings on the iPhone.
2. Scroll to the Phone section and open it.
3. Find the option for showing your caller ID.
4. Switch it off. Calls now go out hidden until you switch it back on.

If that option is missing entirely, your carrier controls caller ID on your line rather than the handset, and you have to request the change from the carrier instead. This is common on prepaid plans and on some business accounts, and it is not a fault with the phone.

How do you hide your number on an Android phone?

1. Open the phone app, not the main system settings.
2. Open its menu and go to the app's own settings.
3. Look for calling accounts, supplementary services, or additional settings, depending on the manufacturer.
4. Open caller ID and choose to hide your number.

The wording differs noticeably between phone makers, and on some devices the setting appears only when a SIM is active. If you have two SIMs, set it for the correct line, since the option is stored per SIM.

How do you hide your number through your carrier instead?

Carriers can apply per-line caller ID blocking, which hides your number on every call regardless of handset settings. Ask for caller ID blocking on the line and confirm it is active before relying on it.

With line blocking switched on, you unhide a single call by dialling the unblocking prefix, star eight two, entered as *82, before the number. That matters more than it sounds, because many businesses and government offices reject hidden calls outright.

When does hiding your phone number not work?

• Emergency services receive your number regardless of any prefix or setting.
• Toll-free numbers can be delivered your number through carrier billing records, so calls to them are not private.
• Some lines use anonymous call rejection and simply refuse withheld calls, so the call never rings.
• Many individuals never answer a call with no caller ID, so the practical result is voicemail rather than a conversation.
• Some calls placed over internet calling apps ignore the carrier setting entirely and use the app's own identity rules.
• International calls may not carry the blocking instruction the whole way through, depending on the networks involved.

What if you want a different number to show instead of none?

Hiding your number and showing an alternative number are different things. If you want the person to see something, ask your carrier about adding a second line to your device, which gives you a second number with its own caller ID.

Do not attempt to display a number you do not control. Sending false caller ID information with intent to deceive or cause harm is illegal in the United States, and it is prosecuted separately from whatever the call was about.

What usually goes wrong when hiding your number?

• A space is typed between the prefix and the number, so the prefix is ignored and the call goes out normally.
• The prefix is added to a number that is already saved with a country code, and the combined string fails to dial.
• The setting is switched on for one SIM on a dual-SIM phone, and the call goes out on the other.
• The handset setting is changed while the carrier holds the real control, so nothing changes at all.
• Someone hides their number to call a doctor's office or a bank, and the office cannot call them back.
• The setting is left on permanently, and the person later wonders why nobody answers.

How do you check whether it is working?

Call a second phone you own and look at the screen. That takes ten seconds and is far more reliable than trusting the setting, especially after a phone update or a SIM swap, both of which can reset caller ID preferences without telling you.

If the test call still shows your number, and the handset setting looks correct, contact your carrier and ask them to check line-level caller ID blocking on your account at the company’s official website or by phone. At that point the handset is not the problem.