A quick call to a marketplace seller, unfamiliar business, or new client should not always require sharing your personal phone number. At the same time, hiding Caller ID incorrectly can affect every outgoing call or cause the recipient’s phone to reject the call altogether.
If you are figuring out how to call private, the right approach depends on whether you want to conceal your number once or keep it hidden by default. The options below cover both situations while clarifying carrier restrictions, device differences, and the limits of private calling.
1. What Happens When You Make a Private Call?
When you make a private call, your phone number is hidden from the recipient’s Caller ID. Instead of your number, their screen may display “Private,” “No Caller ID,” “Restricted,” or “Unknown,” depending on their phone and carrier.
The recipient can still answer, reject, or send the call to voicemail. However, some devices automatically silence or block private calls, so your call may not ring through.
A private call isn’t completely anonymous. Your carrier still processes the call, and identifying information may be available to emergency services or law enforcement under applicable rules.
Private calling also differs from caller ID spoofing: blocking hides your number, while spoofing displays a different number or identity.
2. How to Call Private in 4 Ways
Choose a temporary method for occasional privacy or change the phone settings when you need to hide Caller ID regularly.
Dial a Caller ID Blocking Code
A prefix can hide your number for one outgoing call. In the United States and Canada, many carriers support *67.
- Open the Phone app.
- Select the keypad.
- Enter *67, followed by the complete phone number.
- Tap Call.
- Make another call normally when you want your number to appear again.
For example: *67 555 123 4567
Codes vary by country and network, so confirm the correct prefix with your carrier. If you are checking how to call someone private, this method is usually more practical than changing the setting for every outgoing call.
Hide Caller ID Through iPhone Settings
An iPhone may allow you to hide your number from all standard outgoing calls:
- Open Settings.
- Select Apps > Phone.
- Tap Show My Caller ID.
- Turn the setting off.
When you want your number to reappear, return to the same menu and enable it. The option may be missing or unavailable when your carrier controls Caller ID at the network level.
For someone comparing how to call from a private number across devices, remember that this iPhone setting normally applies to subsequent calls until it is changed again.
Hide Caller ID Through Android Settings
Menu names differ among Android manufacturers, but the general route is:
- Open the Phone app.
- Tap the menu icon and select Settings.
- Open Calling accounts, Supplementary services, or Additional settings.
- Choose the relevant SIM if the phone uses dual SIM.
- Tap Caller ID.
- Select Hide number.
If the how to call private option does not appear, search the settings for “Caller ID” or contact the carrier. Learning how to make a private call on Android requires checking both the phone model and the mobile network because either one may control the feature.
Request Caller ID Blocking From the Carrier
Your carrier may apply Caller ID blocking directly to the line. This option is useful when:
- The phone does not display a Caller ID setting.
- A dialing prefix does not work.
- You want the number hidden by default.
- The account contains several lines with different privacy needs.
Ask whether the service costs extra and how to display the number temporarily when necessary. Also confirm whether it works with Wi-Fi Calling, international calls, and business accounts.
>>> Read more: How to Call Without a SIM Card: 5 Methods to Stay Connected
3. Should You Hide Your Number for One Call or Every Call?
The best approach to how to call private depends on how frequently you need Caller ID protection.
| Option | Best For | Main Benefit | Main Risk |
| Dialing code | One occasional call | Does not change future calls | Code varies by carrier |
| iPhone setting | Repeated calls from an iPhone | Easy to reverse | May be controlled by carrier |
| Android setting | Repeated calls from Android | Applies automatically | Menu differs by device |
| Carrier-level blocking | Permanent privacy preference | Works at the network level | May affect calls you want identified |
Use a one-call code when contacting a marketplace seller, requesting information, or making another isolated call. A phone or carrier setting is more convenient when you regularly use a personal line for work.
Whichever how to private call option you select, remember that many recipients avoid anonymous calls. Displaying your number may be preferable when calling a doctor, employer, delivery service, or anyone who needs to return the call.
4. Why Can’t I Make a Private Call?
If how to call private produces no change, check the following possibilities:
- The dialing code is not supported by your carrier or country.
- The prefix was entered after rather than before the phone number.
- The carrier has disabled Caller ID blocking for the account.
- The call is being placed through a third-party VoIP app.
- A dual-SIM phone is using a different line from the one configured.
- The recipient rejects anonymous calls automatically.
- The number is toll-free or connected to emergency services.
- A business phone system is replacing your settings with its outbound Caller ID.
When how to make a call private does not work through device settings, place a test call to a trusted contact and then speak with your carrier. Do not repeatedly call an unwilling recipient simply to test whether the number is hidden.
5. What Private Calling Can and Cannot Hide
Understanding how to call a number private begins with separating Caller ID privacy from anonymity.
Private calling can usually:
- Prevent your number from appearing on the recipient’s normal Caller ID.
- Replace the number with a label such as Private or Unknown.
- Protect a personal number during an appropriate one-time conversation.
It cannot:
- Conceal the originating number from your carrier.
- Guarantee that the recipient will answer.
- Bypass anonymous-call rejection or spam screening.
- Replace your number inside every messaging or VoIP app.
- Make harassment, impersonation, or fraudulent calls acceptable.
- Guarantee privacy from emergency services or a lawful investigation.
The UK communications regulator Ofcom explains that Caller Line Identification data is exchanged between providers even when a privacy marker prevents the recipient from seeing the number.
It also distinguishes legitimate number withholding from Caller ID spoofing, which displays misleading information.
Read more: How to See What Is Stored on SIM Card (And What Never Touches It)
6. FAQs
Does *67 make a call private?
*67 hides Caller ID for one call on many US and Canadian networks. It is not universal, so test it with a trusted contact or confirm support with your carrier.
How can I hide my caller ID?
Use a supported per-call prefix, turn off Show My Caller ID, or request network-level blocking. The best method for how to make a call private depends on your phone and carrier.
What is the *31# or #31# code for?
On some GSM networks, #31# can withhold Caller ID for one call, while *31# may show it when the line is hidden by default. Because implementation varies, confirm the correct code before using it when checking how to call private.
What is *67 and *69?
*67 commonly blocks Caller ID for one outgoing call. In some North American networks, *69 returns the most recent incoming call, so the two codes serve different purposes.
7. Conclusion
Caller ID blocking can protect your personal number when contacting an unfamiliar person or business. For how to call private on a single occasion, a carrier-supported dialing code is usually the simplest choice; device or network settings work better for recurring calls.
Whichever method you use, test it with a trusted contact first and remember that the carrier can still identify the originating line.
