Robtex

Up: 58.86.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 58.86.40.0/23
Down right: 58.86.42.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.86.40.2	PTR	58.86-40-host2.kbtelecom.net.tw
58.86.40.17	PTR	58.86-40-host17.kbtelecom.net.tw
58.86.40.17	A	www.slkg.com.tw
58.86.40.17	A	www4.topschool.com.tw
58.86.40.19	PTR	58.86-40-host19.kbtelecom.net.tw
58.86.40.19	A	longhwa.topschool.com.tw
58.86.40.19	A	freedom.topschool.com.tw
58.86.40.33	PTR	58.86-40-host33.kbtelecom.net.tw
58.86.40.35	PTR	58.86-40-host35.kbtelecom.net.tw
58.86.40.69	PTR	58.86-40-host69.kbtelecom.net.tw
58.86.40.98	PTR	58.86-40-host98.kbtelecom.net.tw
58.86.40.98	A	webmall.com.tw
58.86.40.98	A	*.webmall.com.tw
58.86.40.102	PTR	58.86-40-host102.kbtelecom.net.tw
58.86.41.47	PTR	58.86-41-host47.kbtelecom.net.tw
58.86.41.47	A	acchy.cn
58.86.41.59	PTR	58.86-41-host59.kbtelecom.net.tw
58.86.41.59	A	prohost.com.tw
58.86.42.70	PTR	58.86-42-host70.kbtelecom.net.tw
58.86.42.70	A	royalmkt.net2cast.com
58.86.42.70	A	lb9om.x.incapdns.net
58.86.43.21	PTR	58-86-43-host21.kbtelecom.net.tw
58.86.43.22	PTR	webits.com.tw
58.86.43.22	A	sfw-enterprise.com
58.86.43.22	A	9s-tw.com
58.86.43.25	PTR	www.carnews.com
58.86.43.50	PTR	58-86-43-host50.kbtelecom.net.tw
58.86.43.50	A	mail.tomo-r.com
58.86.43.53	A	appsoft.com.tw
58.86.43.60	PTR	58-86-43-host60.kbtelecom.net.tw
58.86.43.60	A	sungen.com.tw
58.86.43.70	PTR	carnews.tw
58.86.43.74	PTR	58-86-43-host74.kbtelecom.net.tw
58.86.43.74	A	storage.com.tw
58.86.43.74	A	dr-storage.com
58.86.43.80	PTR	cp10.g-dns.com
58.86.43.81	PTR	58-86-43-host81.kbtelecom.net.tw
58.86.43.82	PTR	58-86-43-host82.kbtelecom.net.tw
58.86.43.82	A	www.wimi.com.tw
58.86.43.82	A	ctms.chinatimes.com
58.86.43.236	PTR	58-86-43-host236.kbtelecom.net.tw