Robtex

Up: 217.21.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 217.21.8.0/23
Down right: 217.21.10.0/23

IP	Type	Hostname
217.21.8.3	A	weino.com
217.21.8.3	A	mail.weino.com
217.21.8.3	A	*.weino.com
217.21.8.4	A	e-geneva.com
217.21.8.15	A	mail.pmhc.com
217.21.8.17	PTR	mail.alhaq.org
217.21.8.31	A+PTR	mail1.pcma.ps
217.21.8.70	A	remote.cbh.ps
217.21.8.92	PTR	mail.alhaq.org
217.21.9.1	PTR	adsl1.a9.interpal.palnet.com
217.21.9.3	PTR	mail.ewaseet.ps
217.21.9.6	A+PTR	mail.palpay.ps
217.21.9.17	PTR	adsl17.a9.interpal.palnet.com
217.21.9.65	PTR	adsl65.a9.interpal.palnet.com
217.21.9.170	PTR	adsl170.a9.interpal.palnet.com
217.21.9.170	A	mail.nwu.ps
217.21.9.245	PTR	adsl245.a9.interpal.palnet.com
217.21.9.245	A	reeeef2.no-ip.biz
217.21.11.156	A	mail.alfajerk.com
217.21.11.156	A	alfajerk.com