Man pages matching name net::whois::ip in section 3pm:

Net::Whois::IP.3pm.en	debian 10 / libnet-whois-ip-perl
Net::Whois::IP.3pm.en	debian 11 / libnet-whois-ip-perl
Net::Whois::IP.3pm.en	debian 12 / libnet-whois-ip-perl