What kind of information about subscribers is the ISP provider technically able to store?

Question

Computer networks

I am interested in what kind of information about subscribers is technically capable of storing an ISP provider. About IP, I know what other information about subscribers can an Internet provider store?

Answer 1

everything in the contract, dns
connection requests from which port, to which port and IP, at what time, by what protocol, the amount of data transmitted and received on this connection.

Answer 2

The provider is obliged to match the subscriber's ip address with the account and store the history of http requests by law, tk. from the authorities at any time a request for any user can come.