To block your number for one supported U.S. call, enter *67 before the full phone number, including the area code, then tap Call. To hide caller ID for ongoing calls, use your phone's caller ID setting or ask your carrier to enable blocking on your line.
The short version
- Use *67 before the number for one supported U.S. call.
- On iPhone, turn off Show My Caller ID in Phone settings.
- On Samsung Galaxy, choose Never under Show your caller ID.
- Google Voice and work calling apps have separate outgoing caller ID controls.
- Blocking has exceptions, and some recipients reject private calls.
| Method | What it does | Time | Use it when |
|---|---|---|---|
| One call with *67 | Hides caller ID once | Under a minute | You need privacy for one call |
| iPhone setting | Hides outgoing caller ID | Under a minute | Your carrier supports the switch |
| Samsung Galaxy setting | Hides outgoing caller ID | Under a minute | You use Samsung's Phone app |
| Mobile carrier blocking | Hides the line's caller ID by default | A few minutes to request | You want ongoing privacy |
| Home phone service | Blocks one call or the whole line | Under a minute for one call | You call from a home phone |
| Google Voice | Hides your Voice caller ID | Under a minute | You place calls through Voice |
| Work calling service | Uses app or extension privacy | Under a minute for one call | You use Zoom Phone or RingCentral |
Dial *67 for one private call
For Verizon mobile and AT&T Wireless in the U.S., enter *67 followed by the number you want to call. Include the area code, then tap Call before the call connects. AT&T specifies the full 10-digit number, so do not leave out the area code for a local call.
This method is useful when you want to contact someone once without changing your usual outgoing caller ID. Enter the prefix again before each call that you want to keep private. For ongoing privacy, use the phone setting or carrier option below instead of typing the code repeatedly.
T-Mobile lists *67 followed by 1 and the destination number for one-call blocking. It also lists #31# followed by 1 and the destination number to show your name and number for an outgoing call. Its alternative hiding code is *31# followed by 1 and the destination number. For a line outside the U.S., ask its provider which per-call prefix it supports before calling.
Blocking prevents your number from appearing on the recipient's caller ID display for supported calls. It does not provide privacy when calling 911 or toll-free numbers on AT&T Wireless, and Verizon also excludes 911 and 800 numbers. Do not treat a hidden caller ID display as a promise of anonymity for every destination.
Turn off caller ID on iPhone
Open Settings, tap Apps, then tap Phone. Open Show My Caller ID and turn the switch off. This is the Phone settings route on iOS 18 and later; on iOS 17 or earlier, open Settings > Phone instead, then look for the caller ID switch.
If Show My Caller ID is missing or dimmed, contact the carrier for that line. Ask whether outgoing caller ID blocking is available and whether it needs to be added to your account. Use Apple's caller ID instructions if you need to confirm which switch to change.
Choose this option when you want supported outgoing calls to hide your number by default. If you only need privacy for one call, the dialing prefix may be a better fit. When you want callers to see your number again, return to the same switch and turn it on.
Hide caller ID on Samsung Galaxy
Open Samsung's Phone app and tap More options, shown as three vertical dots. Tap Settings > Supplementary services > Show your caller ID, then choose Never. If the Phone icon is missing from your Home screen, open the app drawer on Android to find it.
On older Android versions, Samsung lists the route through Phone > More options > Settings or Call Settings, then More or Supplementary settings. Look for the caller ID control there. Choose Always to show your number, or Network default to let your SIM provider decide.
If your number still appears, ask your mobile network whether it permits caller ID hiding in your country. On Pixel and other Android phones, use your provider's supported per-call code or request line-level blocking if you cannot find an outgoing privacy control. Do not turn off Google's See caller ID & spam as a substitute, since that controls caller identification and spam information.
Enable blocking through your mobile carrier
Use carrier-level blocking when you want your mobile line to hide caller ID by default. Start with the provider for the line you actually use, especially if your account has several numbers. Request outgoing Caller ID Blocking so the provider can distinguish it from blocking unwanted incoming calls.
Verizon
For Verizon mobile, sign in to My Verizon and open Manage Blocks. Select the line, choose Block Services, and tap Add if you are using a smartphone. Under Additional Services, set Caller ID Blocking to On; this change requires an Account Owner or Account Manager.
AT&T Wireless
For AT&T Wireless, use your phone's outgoing caller ID setting if it is available. If the device cannot block caller ID for all calls, contact AT&T and request the feature on your account. There is no additional charge for this feature on AT&T Wireless voice plans.
Xfinity Mobile
For Xfinity Mobile, contact Xfinity through chat and ask to enable Caller ID Blocking on the specific mobile line. You must also contact Xfinity to turn the feature off again. Blocking does not apply to public emergency hotlines, poison-control lines or 911. Make sure the request names Xfinity Mobile, because the home phone service has separate controls described below.
Choose the right home phone method
Check your service name before using a home phone code or account portal. AT&T traditional home phone, AT&T digital Phone and AT&T Wireless Home Phone have different instructions. Match the method to your service rather than assuming every home phone follows the same dialing pattern.
AT&T home phone services
On AT&T traditional home phone service, listen for the dial tone and press *67. Wait for the confirmation tones and the next dial tone, then dial the destination number. Blocking ends when you hang up; for permanent blocking, call 800.288.2020 and request it.
For AT&T Phone or AT&T Phone Advanced, sign in to the AT&T phone portal with your member ID. Select Features > Outgoing Calls, expand Hide My Caller ID, turn it ON, and select Save. Turn that setting OFF and save when you want your caller ID displayed by default.
These digital services have a different per-call rule tied to that setting. With Hide My Caller ID disabled, press *82, dial the number, then press # to hide your ID once. With the setting enabled, use *67, the destination number and # to display it once.
For an existing AT&T Wireless Home Phone WF720 line, dial #31# followed by the 10-digit destination number to block one outgoing call. For ongoing blocking, ask AT&T to add the account feature rather than looking for a device switch. Wireless Home Phone is available to existing users and is closed to new activations.
Xfinity Voice and Spectrum Voice
On Xfinity Voice, listen for a dial tone, press *67, then wait for the confirmation tone and a second dial tone. Dial the destination number after that second tone. For blocking by default, contact Xfinity through chat and request Caller ID Blocking Per Line.
Blocking does not apply to public emergency hotlines, poison-control lines or 911. Xfinity Voice disables it automatically for those calls; do not dial *82 to disable it manually.
If per-line blocking is already enabled on Xfinity Voice, press *82 to show your ID for one ordinary call. Wait for the confirmation tone and dial tone, then dial the number. Your usual blocking resumes after you hang up.
On Spectrum Voice, ask Spectrum support how to enable Block Outbound Caller ID for your account. That feature hides your number from the person you call. Be clear about the word outbound, since Block Anonymous Calls instead rejects incoming callers who hide their information.
Hide your number in Google Voice
On a computer, open Google Voice and sign in to the account registered to your number. Click Settings, select Calls, and turn on Anonymous caller ID. In the mobile app, open Menu > Settings and turn on the same option under Calls.
For one call with a U.S. Voice number, open Calls, enter *67 before the phone number, then select Call. Other Voice regions use their own prefixes. Use Google Voice's caller ID settings to choose the instructions for your device.
Use privacy controls in work calling services
Zoom Phone
In the Zoom Phone desktop or mobile app, open the Caller ID menu below the dial pad and choose Hide Caller ID before making the call. You can also dial *67 before the destination number on Zoom Phone, including a desk phone. Ask your administrator for help if the hiding option is unavailable. Zoom Phone caller ID hiding is not guaranteed to work in every country or region.
For ongoing Zoom Phone privacy, sign in to the Zoom web portal, select Zoom Phone, then open Settings. Under Outbound Caller ID, choose Hide Caller ID. This sets the default for the desktop and mobile apps, while desk phones need their own caller ID configuration. The portal hiding option requires Zoom app version 5.4.0 or later and an assigned calling package.
RingCentral
For RingCentral on supported Mitel SIP-DECT desk phones, dial *67 before the full 10-digit number for one call. For ongoing privacy in the MVP 23.1 online-account layout, open Settings > Outbound Calls/Faxes > Caller ID. Choose the phone or calling feature whose outgoing caller ID you want to change.
Click Edit beside that phone or feature and choose the blocking option if your account offers it. Click Done, then Save. If you cannot access the setting or no blocking option is available, ask your administrator for the controls supported by your account. These instructions apply to that published portal layout, rather than every RingCentral app or desk phone.
Skype
Consumer Skype retired on May 5, 2025, so its old caller ID setup instructions are no longer a suitable starting point. Its remaining paid users can access the Skype Dial Pad through the Skype web portal or Teams Free. New customers cannot purchase those paid Skype calling features. Existing Skype caller ID setups were shut down on February 15, 2026.
When private calls do not work
If only one recipient rejects your call, they may be using anonymous call rejection. On Xfinity Voice, a rejection message can ask you to unblock your number and call again. Decide whether to reveal your number before redialing, and use the unblocking method for your service rather than guessing another prefix. On Verizon mobile, enter *82, enter the destination number, then tap Call to show caller ID for that call.
If your iPhone also has cellular calling problems, check for an iPhone carrier settings update as part of fixing the connection. Connect to Wi-Fi or a cellular network, open Settings > General > About, and follow any update instructions. For a missing caller ID switch, ask the carrier about support for the feature.
Frequently Asked Questions
Can I block my number after the call has already started?
No, these methods need to be applied before dialing. Enter the per-call prefix before the destination number, or enable the caller ID setting before placing the call.
Is *67 the same as changing my caller ID number?
No, it hides the presentation of your number on supported calls. It does not select a different outgoing number for the recipient to see.
Which option should I use if I only need privacy once?
On supported U.S. mobile lines, use *67 before the full phone number. For home phone or app calls, use the instructions for that specific service.
Does Google Voice anonymous caller ID stay on across devices?
Yes, hiding caller ID on one device applies to all devices using that Google Voice account. Turn the option off when you want your number displayed again.
Does hiding caller ID also hide my number in text messages?
No, Samsung's caller ID hiding setting does not conceal your identification when you send text messages. Use it for outgoing call privacy, not anonymous texting.
Why is Show My Caller ID missing on my iPhone?
Your carrier may not support turning off caller ID from the phone. If the switch is missing or dimmed, contact the carrier for your line.