Robtex

Up: 81.89.254.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.89.254.0/25
Down right: 81.89.254.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.89.254.65	PTR	mail3.on-services.de
81.89.254.66	A+PTR	ns1.on-services.de
81.89.254.66	A	mail.buecker-lab.de
81.89.254.67	A	mail2.on-services.de
81.89.254.71	A+PTR	mail3.on-services.de
81.89.254.74	PTR	buecker-edv.de
81.89.254.74	PTR	asap.buecker-edv.de
81.89.254.74	PTR	rewe.buecker-edv.de
81.89.254.76	A	www.myepo.de
81.89.254.81	A	www.softlicense.de
81.89.254.113	A+PTR	mail.myepo.de
81.89.254.121	A+PTR	www.myasap.de
81.89.254.121	A+PTR	www.on-services.de
81.89.254.121	A+PTR	www.on-services.net
81.89.254.122	A	asap.buecker-edv.de