Robtex

Up: 87.253.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 87.253.100.0/23
Down right: 87.253.102.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.253.101.9	A+PTR	ns1.tex97.it
87.253.101.9	A	ns1.tex97.com
87.253.101.10	A+PTR	ns2.tex97.it
87.253.101.79	PTR	host-79-101.253-87.enter.it
87.253.101.80	PTR	host-80-101.253-87.enter.it
87.253.101.81	PTR	node81.vcast.it
87.253.101.113	PTR	host-113-101.253-87.enter.it
87.253.101.115	PTR	tex97.com
87.253.101.115	PTR	tex97.it
87.253.101.115	PTR	mail.tex97.com
87.253.101.116	PTR	tex97.com
87.253.101.116	PTR	mail.tex97.com
87.253.101.116	PTR	mail.unidida.com
87.253.101.119	A+PTR	paradigma.mail3.tex97.it
87.253.101.122	A+PTR	fax.tex97.com
87.253.102.6	PTR	node6.interno3.it
87.253.102.9	PTR	host-9-102.253-87.enter.it
87.253.102.10	PTR	host-10-102.253-87.enter.it
87.253.102.10	A	subversive.it
87.253.102.10	A	mail.ugonespolo.com
87.253.102.11	PTR	node11.interno3.it
87.253.102.13	PTR	node13.interno3.it
87.253.102.15	PTR	host-15-102.253-87.enter.it
87.253.102.16	PTR	host-16-102.253-87.enter.it
87.253.102.17	PTR	node17.interno3.it
87.253.102.17	A	mail.webrosanero.it
87.253.102.17	A	mail.webazzurro.it
87.253.102.19	PTR	node19.interno3.it
87.253.102.25	PTR	node25.interno3.it
87.253.102.25	A	www.milanoexpo-2015.org
87.253.102.67	A	virtual1.internotre.com
87.253.102.99	PTR	host-99-102.253-87.enter.it
87.253.102.99	A	ns1.exsorsa.it
87.253.102.106	PTR	host-106-102.253-87.enter.it
87.253.102.106	A	omnifax.it
87.253.102.106	A	exsorsa.it
87.253.102.107	A	fax.exsorsa.it
87.253.102.109	PTR	host-109-102.253-87.enter.it
87.253.102.109	A	sip.advancemedia.it
87.253.102.109	A	sip.exsorsa.it
87.253.102.113	A	voip.witel.it
87.253.102.113	A	advancemedia.it
87.253.102.113	A	prodottivoip.it
87.253.102.118	PTR	host-118-102.253-87.enter.it
87.253.102.118	A	ns2.exsorsa.it
87.253.102.120	A+PTR	mail.exsorsa.it