Robtex

Up: 217.172.192.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 217.172.192.0/20
Down right: 217.172.208.0/20

IP	Type	Hostname
217.172.199.66	PTR	host66-199-dynamic.172-217-r.retail.telecomitalia.it
217.172.202.0	PTR	host0-202-dynamic.172-217-r.retail.telecomitalia.it
217.172.203.0	PTR	host0-203-dynamic.172-217-r.retail.telecomitalia.it
217.172.204.1	PTR	host1-204-dynamic.172-217-r.retail.telecomitalia.it
217.172.206.0	PTR	host0-206-static.172-217-b.business.telecomitalia.it
217.172.206.47	A	host47-206.pool217172.interbusiness.it
217.172.209.1	PTR	host1-209-dynamic.172-217-r.retail.telecomitalia.it
217.172.211.227	PTR	host227-211-static.172-217-b.business.telecomitalia.it
217.172.213.0	PTR	host0-213-static.172-217-b.business.telecomitalia.it
217.172.218.0	PTR	host0-218-dynamic.172-217-r.retail.telecomitalia.it
217.172.218.86	A	host86-218.pool217172.interbusiness.it
217.172.218.96	PTR	host96-218-dynamic.172-217-r.retail.telecomitalia.it
217.172.218.96	A	cinemazero.it
217.172.219.0	PTR	host0-219-static.172-217-b.business.telecomitalia.it
217.172.219.66	PTR	host66-219-static.172-217-b.business.telecomitalia.it
217.172.220.0	PTR	host0-220-dynamic.172-217-r.retail.telecomitalia.it
217.172.222.0	PTR	host0-222-static.172-217-b.business.telecomitalia.it
217.172.222.35	PTR	host35-222-static.172-217-b.business.telecomitalia.it
217.172.222.67	PTR	host67-222-static.172-217-b.business.telecomitalia.it
217.172.223.33	PTR	host33-223-static.172-217-b.business.telecomitalia.it
217.172.223.64	PTR	host64-223-static.172-217-b.business.telecomitalia.it
217.172.223.65	PTR	host65-223-static.172-217-b.business.telecomitalia.it
217.172.223.98	PTR	host98-223-static.172-217-b.business.telecomitalia.it
217.172.223.99	PTR	host99-223-static.172-217-b.business.telecomitalia.it