Robtex

Up: 81.169.148.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.169.148.0/25
Down right: 81.169.148.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.169.148.20	PTR	mail00.ka.rz-ip.net
81.169.148.20	A	mx1.serverkompetenz.de
81.169.148.20	A	mx00.kundenservices.net
81.169.148.34	A+PTR	rns00.ka.rz-ip.net
81.169.148.34	A	dns03.rz-ip.net
81.169.148.37	A+PTR	ns2.serverkompetenz.de
81.169.148.38	A+PTR	sns.serverkompetenz.de
81.169.148.40	A+PTR	ns2.rz-ip.net
81.169.148.41	A+PTR	ns2.stratoserver.net
81.169.148.42	A+PTR	sns.stratoserver.net
81.169.148.43	A+PTR	pns2.rz-ip.net
81.169.148.50	A	ftp00.ka.rz-ip.net
81.169.148.133	PTR	eth0.gw01.ka.rz-ip.net
81.169.148.161	PTR	gw-160-148-81.gw1-gw2.ka.rz-ip.net
81.169.148.164	A+PTR	rns01.ka.rz-ip.net
81.169.148.164	A	dns04.rz-ip.de