spam/phishing/malicious calls do not come from individuals. How about they start with preventing caller ID spoofing/requiring proper caller ID?

the spam calls come from call farms that rotate numbers. they should be required to present a unified and verifiable caller ID

Phone systems can put whatever they want in caller ID, there should be verifiable reverse lookup to a valid registered number along with fines for violators

requiring an individuals ID to get a phone number is going to make the spam/phishing/malicious problem WORSE along with the enormous risks of that database being exposed/abused

> there should be verifiable reverse lookup to a valid registered number

This has existed for a very, very long time; its just a business feature you have to pay a lot of extra money for and that is generally unavailable to consumers.

Business customers get access to DNIS and ANI.

DNIS is the number that was dialed to reach the business. It is used for call routing and marketing analytics.

ANI is the phone number from which the call was made. It’s used again for call routing and analytics, but also billing. It’s how they knew where to send the bill back in the days of 1-900 numbers. Because real money is involved, it’s a pretty good bet it’s usually tied to the real entity.

You, as a mere consumer, are left with caller id, which no business user cares about.

Business PBX folks really like being able to forward calls off to a cell phone while preserving the original caller's caller ID. And making that work requires allowing arbitrary spoofing. There is some work being done to append the stir/shaken signature from the original caller in a different sip header so the call can still be traced, but ultimately caller id is just too limited of a data framework to relay all the info.