Robtex

Up: 61.66.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 61.66.240.0/23
Down right: 61.66.242.0/23

IP	Type	Hostname
61.66.240.158	PTR	ll-61-66-240-158.ll.sparqnet.net
61.66.240.172	PTR	ll-61-66-240-172.ll.sparqnet.net
61.66.240.192	PTR	ll-61-66-240-192.ll.sparqnet.net
61.66.240.203	PTR	ll-61-66-240-203.ll.sparqnet.net
61.66.240.205	PTR	ll-61-66-240-205.ll.sparqnet.net
61.66.240.214	PTR	ll-61-66-240-214.ll.sparqnet.net
61.66.240.214	A	ns1.feib.com.hk
61.66.240.243	A	i-b-c.feib.com.tw
61.66.240.254	PTR	ll-61-66-240-254.ll.sparqnet.net
61.66.240.254	A	lp.feib.com.tw
61.66.241.35	A	mail.siruba.com.tw
61.66.241.35	A	mail.siruba.com
61.66.241.36	A+PTR	siruba.com
61.66.241.36	A	siruba.com.tw
61.66.241.36	A	www.siruba.com.tw
61.66.241.39	A+PTR	thunder.siruba.com
61.66.241.190	A	nxtomo.jp
61.66.241.190	A	tomotoon.jp
61.66.242.22	A	pbmps.via.com.tw
61.66.242.22	A	mps.via.com.tw
61.66.242.31	A+PTR	employee.via.com.tw
61.66.242.31	A+PTR	employee.viatech.com.tw
61.66.242.112	A	linux.via.com.tw
61.66.242.146	A	vqi.via.com.tw
61.66.242.154	A	admin-partnerzone.via.com.tw
61.66.242.229	PTR	cputpspam01.viacpu.com
61.66.242.229	PTR	cputpspam01.via.com.tw
61.66.242.229	A	cpusmg01.viacpu.com
61.66.242.230	A	cputpspam02.viacpu.com
61.66.243.2	A+PTR	mailtp.via.com.tw
61.66.243.23	A+PTR	tpns1.viatech.com.tw
61.66.243.25	A	spamwall.viatech.com.cn
61.66.243.26	A+PTR	tpmg01.via.com.tw
61.66.243.26	A	mx.dopod.com
61.66.243.26	A	spamwall3.via.com.tw
61.66.243.28	A+PTR	mail1.via.com.tw
61.66.243.49	A	hr.viatech.com.tw
61.66.243.49	A	ftp.via.com.tw
61.66.243.64	A	mail.via.com.tw
61.66.243.65	A	mail.via.com.tw
61.66.243.83	A	itservice.via.com.tw
61.66.243.167	PTR	wondermedia.com.tw