Visit Caller ID Device Support tutorials. If no tutorial is listed for your device, visit Troubleshoot & Resolve to fix Caller ID issues for additional help. If your device doesn't have the ability to block or display Caller ID on all outgoing calls, contact us to add or remove this feature at no additional charge. How to Block Caller ID. This wikiHow teaches you how to prevent people you call from seeing your name and number. Keep in mind that, if you succeed in blocking your caller ID on the other person's line, they're unlikely to pick up; additionally, many call-screening apps and services immediately terminate calls from. Caller ID Blocking blocks your number from being displayed through Caller ID either permanently or temporarily. It's a free service. Note: You can't block your number from appearing when calling certain numbers, such as 800 numbers and 911. This video is unavailable. Watch Queue Queue. Watch Queue Queue How do I block my number? Want to keep your number from showing up on someone’s Caller ID? Here’s how. Play video. Blocking your number for the duration of a call. Follow these simple steps to block your number. Note: This will only block your number for the duration of the call. How to block caller-ID. Whether your call is placed through a landline, VoIP phone or mobile phone, your phone number may be visible to the person or business you are calling unless you take action to block Caller-ID directly. Call your cell phone carrier and ask for a line block permanently suppress your phone number in outbound Caller ID.This change is permanent and irreversible. While customer service may attempt to convince you to reconsider, the choice is yours. How to Block Caller ID. You can block your number from appearing on the caller ID of the person you are calling by entering a simple code. You can initiate a temporary block, or you can choose to make the blocking of your phone number permanent. The choice is yours but the methods are different. You can block your caller ID on iPhone in three ways. Here's how to do each, and block your iPhone's caller ID temporarily or permanently. How to Block Caller ID on iPhone. This wikiHow teaches you how to hide your phone number from the person you're calling on your iPhone. Open your Settings. It's an app that's typically found on the home screen.