Man pages matching name netaddr::ip::utilpp in section 3pm:

NetAddr::IP::UtilPP.3pm.en	debian 10 / libnetaddr-ip-perl
NetAddr::IP::UtilPP.3pm.en	debian 11 / libnetaddr-ip-perl
NetAddr::IP::UtilPP.3pm.en	debian 12 / libnetaddr-ip-perl