Man pages matching name net::nslookup in section 3pm:

Net::Nslookup.3pm.en	debian 10 / libnet-nslookup-perl
Net::Nslookup.3pm.en	debian 11 / libnet-nslookup-perl
Net::Nslookup.3pm.en	debian 12 / libnet-nslookup-perl