Robtex

Up: 188.68.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 188.68.64.0/21
Down right: 188.68.72.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.68.64.0	PTR	188-68-64-0.dynamic.sk.ansonlink.com
188.68.64.54	PTR	188-68-64-54.dynamic.sk.ansonlink.com
188.68.64.54	A	btws.cdn-discuz.com
188.68.64.69	PTR	188-68-64-69.dynamic.sk.ansonlink.com
188.68.64.69	A	nli.51job-qq.com
188.68.64.108	PTR	188-68-64-108.dynamic.sk.ansonlink.com
188.68.64.108	A	iix.51job-qq.com
188.68.64.191	PTR	188-68-64-191.dynamic.sk.ansonlink.com
188.68.64.191	A	fcy.cname-dns.com
188.68.64.255	PTR	188-68-64-255.dynamic.sk.ansonlink.com
188.68.65.0	PTR	188-68-65-0.dynamic.sk.ansonlink.com
188.68.65.143	PTR	188-68-65-143.dynamic.sk.ansonlink.com
188.68.65.143	A	yoz.minfo-dns.com
188.68.65.255	PTR	188-68-65-255.dynamic.sk.ansonlink.com
188.68.66.0	PTR	188-68-66-0.dynamic.sk.ansonlink.com
188.68.66.88	PTR	188-68-66-88.dynamic.sk.ansonlink.com
188.68.66.88	A	jxc.cdn-discuz.com
188.68.66.101	PTR	188-68-66-101.dynamic.sk.ansonlink.com
188.68.66.101	A	jxcs.cdn-discuz.com
188.68.66.159	PTR	188-68-66-159.dynamic.sk.ansonlink.com
188.68.66.159	A	perminance.com
188.68.66.211	PTR	188-68-66-211.dynamic.sk.ansonlink.com
188.68.66.211	A	yoz.garfield-dns.com
188.68.66.255	PTR	188-68-66-255.dynamic.sk.ansonlink.com
188.68.67.0	PTR	188-68-67-0.dynamic.sk.ansonlink.com
188.68.67.50	PTR	188-68-67-50.dynamic.sk.ansonlink.com
188.68.67.50	A	nli.naptr-dns.com
188.68.67.67	PTR	188-68-67-67.dynamic.sk.ansonlink.com
188.68.67.67	A	iix.naptr-dns.com
188.68.67.255	PTR	188-68-67-255.dynamic.sk.ansonlink.com
188.68.68.0	PTR	188-68-68-0.dynamic.sk.ansonlink.com
188.68.68.61	PTR	188-68-68-61.dynamic.sk.ansonlink.com
188.68.68.61	A	coulectishol.com
188.68.68.95	PTR	188-68-68-95.dynamic.sk.ansonlink.com
188.68.68.95	A	elsigiothe.com
188.68.68.143	PTR	188-68-68-143.dynamic.sk.ansonlink.com
188.68.68.143	A	liffeltus.com
188.68.68.239	PTR	188-68-68-239.dynamic.sk.ansonlink.com
188.68.68.239	A	dessitiol.com
188.68.68.255	PTR	188-68-68-255.dynamic.sk.ansonlink.com
188.68.69.0	PTR	188-68-69-0.dynamic.sk.ansonlink.com
188.68.69.255	PTR	188-68-69-255.dynamic.sk.ansonlink.com
188.68.70.0	PTR	188-68-70-0.dynamic.sk.ansonlink.com
188.68.70.11	PTR	ns1648.ztomy.com
188.68.70.255	PTR	188-68-70-255.dynamic.sk.ansonlink.com
188.68.71.0	PTR	188-68-71-0.dynamic.sk.ansonlink.com
188.68.71.255	PTR	188-68-71-255.dynamic.sk.ansonlink.com
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