Imagine this: you need to call a client, a landlord, or a service provider, but you don’t want them to have your personal cell phone number. Maybe you’re selling an item online, coordinating a surprise party, or simply value your privacy. The ability to block your caller ID is a powerful tool in an age where personal data is constantly at risk. In 2026, with robocalls and spam reaching new heights, knowing how to control what information you share during a phone call is not just a—it’s a necessity for protecting your digital identity.
This comprehensive guide will walk you through every reliable method to block your cell phone number, from universal star codes to carrier-specific apps and advanced smartphone settings. Whether you need a one-time block or a permanent solution, you will learn the exact steps for both iPhone and Android devices, understand the limitations of each method, and discover how to unblock your number when needed. By the end, you will have the confidence to make any call with complete control over your privacy.
The Universal Method: Using *67 for a One-Time Block
The quickest and most widely known method for blocking your number on a single call is using the vertical service code 67. This code works on virtually all landlines and cell phones across major carriers in the United States and Canada, including Verizon, AT&T, T-Mobile, and Sprint. To use it, simply dial 67 followed by the full 10-digit phone number you wish to call. For example, if you are calling (555) 123-4567 you would dial *675551234567. The recipient see "Blocked," "Private," or "No Caller ID" on their screen instead of your actual number.
This method is ideal for situations where you only need to hide your number temporarily. Perhaps you are calling a business for a price quote, responding to a classified ad, or making a confidential inquiry. The key advantage of 67 is that it requires no setup, no app downloads, and no changes to your phone’s settings. It is a one-time instruction sent to the telephone network, meaning your next call without 67 will display your number normally. However, there are important caveats: *67 does not work for toll-free numbers (800, , 877, etc.) or emergency services like 911. Additionally, some businesses and government agencies have systems that can still identify blocked numbers.
For maximum effectiveness, always dial 67 before the number, not after. If you hear a message saying the code is not supported, it may be due to your specific carrier or the recipient’s phone system. In such rare cases, you can try the alternative code 31# in some regions, though *67 remains the gold standard for North America. Remember, this is a per-call solution, so you must repeat the process each time you want to block your number.
Permanent Blocking: Adjusting Phone’s Default Settings
If you want every outgoing call to automatically show as "Private" or "Blocked," you need to change your phone’s default caller ID settings. This is a permanent solution until you decide to turn it off. On an iPhone running iOS 18 or later (as of 2026), navigate to, then Phone, then Show My Caller ID. You will see a simple toggle switch. Turn it off, and your number will be hidden for all calls until you toggle it back on. This setting is carrier-dependent, but it works seamlessly for most major providers.
For Android users, the path varies slightly by manufacturer (Samsung, Google Pixel, OnePlus, etc.), but general steps are consistent. Open the Phone app, tap the three-dot menu in the top right corner, select Settings, then look for Calls or Calling Accounts. Within that menu, you should find an option labeled "Additional Settings" or "Supplementary Services." Tap on "Caller ID" and "Hide Number." On some Android versions, you may see three options: Network Default, Hide Number, and Show Number. Selecting "Hide Number" will block your caller ID on all outgoing calls.
It is crucial to test this setting after making the change. Call a friend or a second phone to confirm that your appears as "Blocked" or "Private." Keep in mind that this permanent setting can be inconvenient if you frequently call people who need to see your number, such as doctors’ offices or delivery services. In those cases, you can temporarily override the permanent block by dialing *82 before the number, which forces your caller ID to be shown for that single call. This gives you the best of both worlds: by default, with an easy escape hatch when needed.
Carrier-Level Solutions: Using Your Provider’s and Apps
Your mobile carrier offers more robust tools for managing caller ID than just the basic settings on your phone. In 2026, all major carriers provide dedicated apps and online account portals that give you granular control over your privacy. For example, Verizon’s Call Filter app (available for both iOS and Android) includes a feature to block your number permanently, along with spam detection and call blocking. Similarly, AT&T’s Call Protect app and T-Mobile’s Scam Shield offer similar functionalities. These apps are often free with your plan, though premium tiers may include additional features like reverse number lookup.
To use these carrier-level solutions, start by logging into your account on your carrier’s website or downloading their official app. Look for sections labeled "Privacy," "Caller ID," or "Blocking." You may find an option to "Block My Number" or "Hide Caller ID" that works independently of your phone’s settings. This is particularly useful if you have an older phone that does not support the native caller ID toggle, or if you want to ensure the setting persists even after a factory reset or switching to a new device.
One major advantage of carrier-level blocking is that it often works for calls made from other devices linked to number, such as a smartwatch or a tablet with cellular capability. However, be aware that some carriers may charge a small monthly fee for advanced privacy features. Additionally, if you travel internationally, carrier-level blocking may not apply to calls made on roaming networks. Always check with your provider’s support team if you encounter issues. For most users, combining the carrier app with the phone’s native setting provides the most reliable and comprehensive privacy protection.
Advanced Techniques: Third-Party Apps Burner Numbers
Important Limitations and Legal Considerations in 2026
While blocking your caller ID is legal and widely supported, there are critical limitations you must understand. First, cannot block your number when calling emergency services like 911. This is a federal regulation in the United States and a similar rule in most countries, as emergency responders need your number to call you back if the call drops. Attempting to block your number on a 911 call will be ignored by the network. Similarly, toll-free numbers (800, 888, ) often have systems that can bypass caller ID blocking, meaning your number may still be captured for billing or identification purposes.
Another important consideration is that some individuals and businesses use call-blocking services that automatically reject "Private" or "Blocked" calls. If you call a doctor’s office or a government agency with a blocked number, you may hear a message saying "We do not accept blocked calls" and be disconnected. In these cases, you must either unblock your number or use service like Google Voice that provides a real, non-blocked number. Additionally, law enforcement and certain legal entities can obtain your number even if it is, through a court order or subpoena to your carrierFinally, be aware of the legal landscape. In 2026, many countries have strict laws against using blocked numbers for harassment, fraud, or illegal activities. For example, the Truth in Caller ID Act in the U.S. makes it a crime to deliberately falsify caller ID information with the intent to defraud or cause harm. Blocking your number for legitimate privacy reasons is perfectly fine, but using it to impersonate someone else or to commit a crime can result in severe penalties. Always use these tools ethically and responsibly.
Key Takeaways
- ✓ Dial *67 before a phone number to block your caller ID for a single call, but note it does not work with toll-free or emergency numbers.
- ✓ Permanently block your number by toggling off "Show My Caller ID in iPhone settings or selecting "Hide Number" in Android’s call settings.
- ✓ Use your carrier’s official app (like Verizon Call Filter or T-Mobile Scam Shield) for carrier-level blocking that persists across devices.
- ✓ Third-party apps like Google Voice, Burner, or H provide a second phone number to keep your real number completely private.
- ✓ Be aware that blocked calls may be rejected by some businesses, and you cannot block your number when calling 911 or other emergency services.
Frequently Asked Questions
Does *67 work on all phones and carriers?
Yes, *67 is a universal vertical service code that works on virtually all landlines and cell phones from major carriers in the U.S. and Canada, including Verizon, AT&T, T-Mobile, and Sprint. However, it may not work on some VoIP services or international carriers. Always test it on a friend’s phone first to confirm it works with your specific carrier.
Can I block my number permanently on an iPhone?
Yes, you can. Go to Settings, then Phone, then Show My Caller ID, and toggle the switch off. This will hide your number for all calls until you turn it back on. This setting is stored on your device and linked to your carrier, so it should persist across software updates.
Will a blocked number still show up on my phone bill?
No, blocking your caller ID does not affect your phone bill. Your carrier still knows you made the call for billing purposes, but the recipient’s phone company does not display your number. Your monthly statement will show the call as usual, including the number you dialed and the duration.
Can I unblock my number for a single call if I have permanent blocking enabled?
Yes, you can. If you have set your phone to permanently your number, you can temporarily show it for a single call dialing 82 before the number. This code forces your caller ID to be displayed, overriding your default setting. This is the reverse of 67.
Conclusion
Blocking your cell phone number is a straightforward process with multiple reliable options, whether you need a one-time solution with *67, a permanent setting on your phone, or a carrier-level feature through your provider’s app. For those seeking maximum privacy, third-party apps like Google Voice offer an additional layer of separation by providing a completely different number. The key is to choose the method that best fits your specific needs, whether it’s for a single sensitive call or ongoing privacy protection.
As you move forward, take a moment test the method you prefer. Call a friend or family member and ask them what they see on their screen. This test will give you confidence that your privacy is protected. Remember to use these tools ethically and be aware of the limitations, especially with emergency services and toll-free numbers. By mastering these techniques, you take control of your personal information in an increasingly connected world.
Daniel Mitchell is a home appliances specialist with over a decade of hands-on experience testing, reviewing, and comparing everyday household products. He focuses on helping homeowners make smarter buying decisions through practical insights, real-world testing, and easy-to-understand advice. Daniel covers everything from kitchen appliances to smart home solutions, with a strong emphasis on performance, energy efficiency, and long-term reliability.
