To block or hide your phone number on an iPhone, you have several options:

Hide Your Number Permanently via Settings

1. Open the Settings app.
2. Scroll down and tap Phone.
3. Tap Show My Caller ID.
4. Toggle Show My Caller ID off.

This will hide your number on all outgoing calls until you turn it back on, showing "No Caller ID" or "Private Number" to recipients

Hide Your Number for a Single Call Using a Dial Code

• Open the Phone app and tap Keypad.
• Dial *67 (or the specific code for your country) followed by the phone number you want to call.
• Tap the call button.

This method hides your number only for that call. Note that not all carriers support this, and some numbers (like toll-free) may still see your number

Additional Tips

• Some third-party apps (like Skype or WhatsApp) allow you to hide your number within the app's privacy settings.
• You can also hide your number on a per-contact basis by editing the contact and enabling "Hide My Caller ID" if your iPhone supports this.
• For FaceTime calls, your number may still be visible by default unless you adjust privacy settings accordingly

If the setting to hide your caller ID is disabled or unavailable, it could be due to carrier or regional restrictions. In that case, contact your mobile carrier for assistance

. In summary, the easiest way is to toggle off "Show My Caller ID" in Settings

Phone for all calls, or dial *67 before a number for one-time hiding of your number