Robtex

Up: 185.79.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 185.79.20.0/23
Down right: 185.79.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.79.20.3	A	foremain.com
185.79.20.4	PTR	mail.s20-9.ds.bestadgo.com
185.79.20.4	A	mail.ds.skandinavien-online.com
185.79.20.4	A	mail.ds.emailsent2u.com
185.79.20.5	PTR	mail.s20-10.ds.bestadgo.com
185.79.20.5	A	ds.skandinavien-online.com
185.79.20.5	A	ds.emailsent2u.com
185.79.20.235	A	agarcive.noip.me
185.79.21.1	PTR	s21-1.bronkomailers.com
185.79.21.4	PTR	mail.s21-9.ds.box-email.it
185.79.21.4	A	mail.ds.spendierisparmia.it
185.79.21.5	A	news.scont-one.it
185.79.21.5	A	news.email-scontone.it
185.79.21.5	A	ds.spendierisparmia.it
185.79.22.2	PTR	s22-2.infobeeztel.com
185.79.22.2	A	ns1.aprovechaeldia.es
185.79.22.4	A	mail.news.occasionialvolo.it
185.79.22.4	A	mail.ds.onlinenegocios.es
185.79.22.4	A	mail.news.tehatocado.com
185.79.22.5	PTR	mail.s22-10.ds.offrequimeplait.fr
185.79.22.140	A	codegy.com
185.79.23.5	A	ds.permissionmac.com