Robtex

Up: 188.68.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 188.68.72.0/22
Down right: 188.68.76.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.68.72.0	PTR	188-68-72-0.dynamic.sk.ansonlink.com
188.68.72.51	PTR	188-68-72-51.dynamic.sk.ansonlink.com
188.68.72.51	A	wnvip66.com
188.68.72.51	A	vn365vip9.com
188.68.72.167	PTR	188-68-72-167.dynamic.sk.ansonlink.com
188.68.72.167	A	kya.cdn-discuz.com
188.68.72.231	PTR	188-68-72-231.dynamic.sk.ansonlink.com
188.68.72.231	A	cixs.cdn-discuz.com
188.68.72.255	PTR	188-68-72-255.dynamic.sk.ansonlink.com
188.68.73.0	PTR	188-68-73-0.dynamic.sk.ansonlink.com
188.68.73.255	PTR	188-68-73-255.dynamic.sk.ansonlink.com
188.68.74.56	PTR	188-68-74-56.dynamic.sk.ansonlink.com
188.68.74.56	A	awj.cdn-discuz.com
188.68.74.87	PTR	188-68-74-87.dynamic.sk.ansonlink.com
188.68.74.87	A	pfm.cname-dns.com
188.68.74.90	PTR	188-68-74-90.dynamic.sk.ansonlink.com
188.68.74.90	A	yoz.51job-qq.com
188.68.74.150	PTR	188-68-74-150.dynamic.sk.ansonlink.com
188.68.74.255	PTR	188-68-74-255.dynamic.sk.ansonlink.com
188.68.75.0	PTR	188-68-75-0.dynamic.sk.ansonlink.com
188.68.75.194	PTR	188-68-75-194.dynamic.sk.ansonlink.com
188.68.75.194	A	ufws.cdn-discuz.com
188.68.75.255	PTR	188-68-75-255.dynamic.sk.ansonlink.com
188.68.76.0	PTR	188-68-76-0.dynamic.sk.ansonlink.com
188.68.76.96	PTR	188-68-76-96.dynamic.sk.ansonlink.com
188.68.76.96	A	ldqs.cdn-discuz.com
188.68.77.242	PTR	188-68-77-242.dynamic.sk.ansonlink.com
188.68.77.242	A	tjos.cdn-discuz.com
188.68.77.255	PTR	188-68-77-255.dynamic.sk.ansonlink.com
188.68.78.0	PTR	188-68-78-0.dynamic.sk.ansonlink.com
188.68.78.107	PTR	188-68-78-107.dynamic.sk.ansonlink.com
188.68.78.107	A	pcu.cdn-discuz.com
188.68.78.255	PTR	188-68-78-255.dynamic.sk.ansonlink.com
188.68.79.0	PTR	188-68-79-0.dynamic.sk.ansonlink.com
188.68.79.255	PTR	188-68-79-255.dynamic.sk.ansonlink.com