Robtex

Up: 220.241.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 220.241.21.0/25
Down right: 220.241.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.241.21.5	A	mail.beegl.com.hk
220.241.21.5	A	mail.bdhk.com.hk
220.241.21.38	PTR	mail.pts-consulting.com.hk
220.241.21.38	PTR	webmail.pts-consulting.com.hk
220.241.21.65	A	lb1.cmhk.com
220.241.21.70	A+PTR	mail.cmhk.com
220.241.21.70	A	smtp.cmhk.com
220.241.21.71	A+PTR	mx.cmhk.com
220.241.21.71	PTR	mx2.cmhi.com.hk
220.241.21.71	PTR	mx1.htc.com.hk
220.241.21.72	A+PTR	mail.hkmw.com.hk
220.241.21.72	A	hkmw.com.hk
220.241.21.73	PTR	pop.hkmw.com.hk
220.241.21.75	A	www.cmhicom.com
220.241.21.75	A	hostmaster.cmfhk.com
220.241.21.75	A	*.cmfhk.com
220.241.21.76	A	cmport.com.hk
220.241.21.76	A	www.cmport.com.hk
220.241.21.77	A	cmhi.com.hk
220.241.21.78	A	www.cmhk.com
220.241.21.80	A	one.cmhk.com
220.241.21.93	A+PTR	mx2.cmhoulder.com
220.241.21.93	A+PTR	mx.houlder.com.hk
220.241.21.93	A+PTR	mx2.houlder.com.hk
220.241.21.94	A+PTR	mx.cmhoulder.com
220.241.21.94	A+PTR	mx1.cmhoulder.com
220.241.21.94	A+PTR	mx1.houlder.com.hk
220.241.21.97	A	houlder.com.hk
220.241.21.99	A	mail.ctvhk.com
220.241.21.99	A	mx.ndstravel.com
220.241.21.100	A	mail.houlder.com.hk
220.241.21.101	A	www.cmihk.net
220.241.21.103	A	mail.cmihk.net
220.241.21.130	A	stacismtpb.stacicorp.com
220.241.21.131	A+PTR	stacismtp.stacicorp.com
220.241.21.133	A	stacimail.stacicorp.com
220.241.21.193	A	mx1.physiotec.com
220.241.21.193	A	hostmaster.physiotec.com
220.241.21.193	A	physiotec.com