Robtex

Up: 193.194.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 193.194.16.0/23
Down right: 193.194.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.194.16.126	PTR	web.esiway.net
193.194.16.129	PTR	ns1.esiway.net
193.194.16.129	A	esiway.org
193.194.16.129	A	esiway.com
193.194.16.131	PTR	relay.esiway.net
193.194.16.132	A	ftp.esiway.net
193.194.16.133	A	proxy.esiway.net
193.194.16.134	A+PTR	news.esiway.net
193.194.16.135	A+PTR	whois.esiway.net
193.194.16.136	A	radius.esiway.net
193.194.16.137	A+PTR	relay2.esiway.net
193.194.16.150	A	tmp.esiway.net
193.194.16.153	A+PTR	balrog.esiway.net
193.194.16.155	A	sauron.esiway.net
193.194.16.156	PTR	melkor.esiway.net
193.194.16.157	A+PTR	morgoth.esiway.net
193.194.16.158	A+PTR	dns.esiway.net
193.194.16.160	A	nazgul.esiway.net
193.194.16.190	PTR	rt2-mi-eth0-4.esiway.net
193.194.16.225	A+PTR	ghost.esi.solutions
193.194.16.253	PTR	rt1-colt-eth0-0.esiway.net
193.194.16.254	PTR	rt1-mi-eth1.esiway.net
193.194.17.123	A	jeanluc.it
193.194.17.123	A	sicuraid.info
193.194.17.123	A	misericordiamilano.org
193.194.17.125	A	rotoca.it
193.194.17.126	PTR	web.esiway.net
193.194.17.126	A	free.it
193.194.17.126	A	vh.esiway.net
193.194.17.158	A	rt-wel01-eth0.esiway.net
193.194.17.161	A	ofg.it
193.194.17.161	A	mail.ofg.it
193.194.17.163	PTR	www.obi-servizioclienti.it
193.194.17.163	A	obi-servizioclienti.it
193.194.17.163	A	mail.obi-servizioclienti.it
193.194.17.164	A	obi-relatiiclienti.ro
193.194.17.225	A+PTR	con01.esiway.net
193.194.17.227	PTR	www.visaevolution.com
193.194.17.227	A	mail.gensets.it
193.194.17.227	A	nettuno-irrigazione.com
193.194.17.229	PTR	www.acena.it
193.194.17.229	A	adv-factory.it
193.194.17.229	A	todine.net
193.194.17.230	PTR	www.crisopmilano.it
193.194.17.233	PTR	www.wlinker.it
193.194.17.233	A	calzatech.it
193.194.17.233	A	mail.wlinker.it
193.194.17.235	PTR	www.itigli2.com
193.194.17.236	PTR	mail.datatravel.net
193.194.17.237	PTR	www.datatravel.net
193.194.17.237	A	rosarosae.info
193.194.18.2	PTR	addr2.two-net.com
193.194.18.3	PTR	addr3.two-net.com
193.194.18.4	PTR	www.two-net.com
193.194.18.5	PTR	server.two-net.com
193.194.18.6	PTR	rt-tnt01-eth0.esiway.net
193.194.18.7	PTR	tnt01-bcast0-29.esiway.net
193.194.18.19	PTR	addr3.linkupnet.com
193.194.18.22	PTR	rt-lup01-eth0.esiway.net
193.194.18.33	PTR	fw-svittore.linkupnet.com
193.194.18.141	PTR	genrev.advertown.com
193.194.18.161	PTR	genrev.advertown.com
193.194.18.165	PTR	genrev.advertown.com
193.194.18.200	PTR	genrev.advertown.com
193.194.18.224	PTR	vserver-03.advertown.com
193.194.18.250	PTR	messiah.advertown.com
193.194.18.250	A	mail.faema.com
193.194.18.251	PTR	dns2.advertown.com
193.194.18.252	PTR	dns1.advertown.com