Robtex

Up: 193.41.168.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 193.41.170.0/24
Down right: 193.41.171.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.41.170.0	PTR	user-000.ifsworld.com
193.41.170.131	PTR	www.ifsworld.com
193.41.170.131	A	www.corpnet.ifsworld.com
193.41.170.131	A	ifs.cz
193.41.170.150	A	sip.ifsworld.com
193.41.170.161	A	ftp.ifsworld.com
193.41.170.163	PTR	lkpextftp01b.ifsworld.com
193.41.170.163	A	citrix.ifsworld.com
193.41.170.171	PTR	193-41-170-171.ifsworld.com
193.41.170.171	A	ifs.com
193.41.170.172	PTR	lkpextwe10.ifsworld.com
193.41.170.172	A	citrixeu.ifsworld.com
193.41.170.172	A	ispnet.ifsworld.com
193.41.170.200	PTR	193-41-170-200.ifsworld.com
193.41.170.200	A	smoke.ifs.cz
193.41.170.201	PTR	193-41-170-201.ifsworld.com
193.41.170.201	A	citrixeu.ifsworld.com
193.41.170.210	PTR	193-41-170-210.ifsworld.com
193.41.170.210	A	ispnet.ifsworld.com
193.41.170.210	A	193-41-170-237.ifsworld.com
193.41.170.243	PTR	user-no.ifs.no
193.41.170.245	PTR	193-41-170-245.ifsworld.com
193.41.171.100	PTR	gw-vpn.supportnet.ifsworld.com