How can I find someones phone number from a IP Address

[Cybersec]

I’m trying to determine a phone number based on an IP address. I’ve already pinpointed the approximate location and confirmed that the user is on Verizon Mobile. I understand that this location data has a margin of error ranging from 5 to 20 feet. However, I need to find either a phone number or an email address. If I can obtain the email address, I’m confident I can retrieve the phone number. And with the phone number I can get an approximate location.