Q&A for How to Block Caller ID

Yes.

No, Because the network uses a legacy technology that goes back to before dawn of '800' numbers. ANI: Automatic Number Identification. This technology is what is used to accurately bill calls you make using operator assistance, and related types of calls. The scammers cannot game this information. They have no access to it in the call processing stream. One technology uses this to defend against the scammers, by forwarding their calls to an 800 number you control. Now if you can associate the call to your controlled number, with a call that is a scam, you have a billing telephone number to report to the anti spam/scam forces in your jurisdiction. This makes it easier to do TCPA lawsuits.

*67 should work on landlines and most cell phones in North America. If you're not in North America, try one of the options for your region.

On the person's phone you are calling, it lists as "Private Caller."

Turn off your caller I.D. or dial *67 plus the number of person you're calling. Most of the time this works. Your number will appear as unknown on their end.

No.

If you have the number, call the phone company and request blocking. Or, if you have Comcast voice, you can do it through there for free, for up to 25 people.

It's not an app, but check out nomorerobo.com, it has an interface that allows you to effectively block calls from known robo-calling lines. I'm using it and it seems to do a good job.

Log in to your online phone bill. If you do not have detailed billing, request it through your phone carrier. It will show the numbers of who called or texted you. Then you can block numbers as needed.

After you press 9 and get an outside line, put in your *67 or #31#, listen for the dial tone to come back, then add your number.