Robtex

Up: 84.254.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 84.254.64.0/23
Down right: 84.254.66.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.254.64.35	A+PTR	mx11.smartterra-business.de
84.254.64.35	A	mx11.securewebs.net
84.254.64.139	A+PTR	hood.securewebs.net
84.254.65.5	A+PTR	dns1-hopa.securewebs.net
84.254.65.24	PTR	mail.vspn.de
84.254.65.25	A	mx.cheapvps.de
84.254.65.34	A+PTR	mx0.mail.dus2.de.smartterra.eu
84.254.65.34	A	mx11.tangolima.net
84.254.65.34	A	mx0.mail.dus.de.smartterra.eu
84.254.65.35	PTR	mx1.mail.dus2.de.smartterra.eu
84.254.65.35	A	mx1.mail.dus.de.smartterra.eu
84.254.65.36	A+PTR	mx2.mail.dus2.de.smartterra.eu
84.254.65.36	A	mx2.mail.dus.de.smartterra.eu
84.254.65.51	PTR	lb-mail.mail.dus2.de.smartterra.eu
84.254.65.51	A	mail.smartterra.de
84.254.65.51	A	mail.smartterra.eu
84.254.65.55	PTR	lb-mx.mail.dus2.de.smartterra.eu
84.254.65.66	A+PTR	priv0.web.smartterra.eu
84.254.65.67	A	turkowski.net
84.254.65.67	A	blablubb.com
84.254.65.67	A	muenster-cardinals.de
84.254.65.169	A	gorkon.securewebs.net
84.254.65.197	PTR	mx.securewebs.net
84.254.65.197	A	mx-lb.smartterra-business.de
84.254.65.199	PTR	mx-grey-lb.smartterra-business.de
84.254.65.211	A	mailout02.securewebs.net
84.254.65.220	PTR	mda.securewebs.net
84.254.65.220	A	mail.bluekennels.de
84.254.65.220	A	mail.stollreiter-academy.com
84.254.66.8	A	mail-testlab.securewebs.net
84.254.66.8	A	mail.hostinghell.eu
84.254.66.9	A	mail.hostinghell.eu
84.254.66.229	A	mail.securewebs.net
84.254.66.230	A	mailin.hostingparadise.de
84.254.66.230	A	mx-grey-lb.smartterra-business.de
84.254.66.230	A	mailin.securewebs.net