Where is there a list of which IPs are issued by which ISPs?

Question

Domain Name System

There are thousands of IP verification services that, in addition to the IP itself, write to which organization this IP is assigned.
For example, I want to make such a service too. I can easily determine the IP number myself on my server. How do you know which organization it belongs to? Is there any database, API for this? What organizations are engaged in this, who certifies all this, gives accounting, issues IP?

Answer 1

There are bases, no API, and portals for checking information in TOS contain the phrase "parsing by bots is prohibited." whois.ripn.net is one of the portals, and the database itself is available here https://www.ripe.net/manage-ips-and-asns/db (they both host and support it).

Answer 2

WHOIS

Answer 3

RIPE definitely has it)