How to Hide Your Number with Prefix Codes on Samsung Phones

Samsung Phone keypad open ready to enter prefix dialing code

If you want to call a business or stranger without sharing your personal number, you can hide your caller ID using a quick dial code. I’ll show you how to dial private prefix codes on your Samsung phone in a few taps.

1. Open the Phone App Keypad

Tap the green **Phone** app icon on your home screen and open the **Keypad** tab at the bottom.

Keypad displaying *67 or #31# entered before destination number
Enter Prefix Code Before Phone Number

2. Type the Caller ID Blocking Prefix

Enter **#31#** (standard for GSM networks across Europe and global carriers) or ***67** (standard across North America).

Tapping green call button to send the private caller ID call
Place Outgoing Call with Dialing Prefix

3. Enter the Recipient Phone Number

Type the complete phone number right after the prefix code without adding spaces or dashes.

Recipient phone screen lighting up with Private Number caller ID
Recipient Receiving Private Number Call

4. Tap the Call Button

Tap the green **Call** button. Your cellular carrier will strip your phone number and transmit Private Number or Unknown to the other phone.

Editing contact card to save dialing prefix directly ahead of phone number
Save Prefix into Contact Phone Number

5. Save the Prefix for Frequent Contacts

If you call a certain number regularly and always want privacy, tap **Contacts**, tap **Edit**, and paste the prefix directly in front of their number.

Helpful Tips

Dialing codes only block caller ID for that single phone call. If you want to block your number permanently on every call, read our guide on how to hide your number in Samsung phone settings.


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