Robtex

Up: 217.29.158.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.29.158.0/25
Down right: 217.29.158.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.29.158.1	A	ns1.christof-group.com
217.29.158.32	A+PTR	mx01.christof-group.at
217.29.158.32	A	mx01.christof-group.com
217.29.158.33	A+PTR	mx02.christof-group.at
217.29.158.33	A	mx02.christof-group.com
217.29.158.117	PTR	117-158-29-217.grazkom.at
217.29.158.127	PTR	127-158-29-217.grazkom.at
217.29.158.128	PTR	128-158-29-217.grazkom.at
217.29.158.143	PTR	143-158-29-217.grazkom.at
217.29.158.144	PTR	144-158-29-217.grazkom.at
217.29.158.148	PTR	148-158-29-217.static.grazkom.at
217.29.158.148	A	www.gibs.at
217.29.158.148	A	gibs.at
217.29.158.149	PTR	149-158-29-217.static.grazkom.at
217.29.158.159	PTR	159-158-29-217.grazkom.at
217.29.158.160	PTR	160-158-29-217.grazkom.at
217.29.158.175	PTR	175-158-29-217.grazkom.at
217.29.158.176	PTR	176-158-29-217.grazkom.at
217.29.158.182	A	nixserioes.com
217.29.158.191	PTR	191-158-29-217.grazkom.at
217.29.158.192	PTR	192-158-29-217.grazkom.at
217.29.158.194	PTR	194-158-29-217.grazkom.at
217.29.158.194	A	pop.diagonale.at
217.29.158.194	A	server1.diagonale.at
217.29.158.199	PTR	199-158-29-217.grazkom.at
217.29.158.200	PTR	200-158-29-217.grazkom.at
217.29.158.203	PTR	mx1.pewag.com
217.29.158.207	PTR	207-158-29-217.grazkom.at
217.29.158.208	PTR	208-158-29-217.grazkom.at
217.29.158.213	A	mail.herzog.at
217.29.158.215	PTR	215-158-29-217.grazkom.at
217.29.158.216	PTR	216-158-29-217.grazkom.at
217.29.158.220	A	webmail.khg-graz.at
217.29.158.223	PTR	223-158-29-217.grazkom.at
217.29.158.224	PTR	224-158-29-217.grazkom.at
217.29.158.231	A	mail.mikrozentrum.at
217.29.158.232	A+PTR	mail.dccs.at
217.29.158.240	PTR	240-158-29-217.static.grazkom.at
217.29.158.241	PTR	241-158-29-217.static.grazkom.at
217.29.158.241	A	www.zg-view.com
217.29.158.241	A	citax.eu
217.29.158.245	PTR	245-158-29-217.grazkom.at
217.29.158.245	A	ftp.dccs.at