unwanted phone calls

We have tried nomorobo and other call blockers. They seem to work only with legitimate businesses that always call from the same number. Our unwanted calls come from spoofed numbers-- same caller/recording but different caller id and phone number each time.

Something requiring the caller to enter a short keycode would work for most cases.

Another possible solution would be to prevent phone number & caller id spoofing completely. An end-to-end certified calling system would also solve the problem.

Nomorobo and other call blockers assume that the calling number is always the same. Our harassing callers use spoofed phone numbers and caller id.

A request to type in a 3-digit code would work for most current calls (though it won't be long before AI can beat a challenge/response system).

Another solution is to have a closed system where calls are end-to-end certified and caller id cannot be spoofed.

If we change our phone number, would that defeat this kind of caller?

A month ago, I found this feature and set it up. No effect on our unwanted calls.

Today I rechecked the settings and they are correct. The system seems to have no clue that the calls are spam.

All the spam blocking seems to be based on the idea of blocking a single number. That is not useful when the number changes with each call. I have checked 100 phone numbers used by our 6 most frequent spam callers. No repeats.

Calls come most frequently from our own area code (505), but occasionally some other. Caller ID often lists just a city, but sometimes an unknown person's name. On a few occasions, we have received spam calls with caller ID information from local acquaintances.

This is the main feature we have for the home phone service to block the unwanted calls. If you believe all the settings are correct you can call 844-963-0215. You’ll be asked to leave a voice message with your name, preferred contact telephone number (where we have authorization to return your call) and details regarding this request for assistance with changing Spam Blocker settings. We’ll return your call within three business days.