Robtex

Up: 106.10.144.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 106.10.144.0/25
Down right: 106.10.144.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
106.10.144.32	PTR	c3.rri.mail.sg3.yahoo.com
106.10.144.32	A	rri.mail.sg3.yahoo.com
106.10.144.33	PTR	c4.rri.mail.sg3.yahoo.com
106.10.144.33	A	rri.mail.sg3.yahoo.com
106.10.144.40	PTR	c1.rri.mail.sg3.yahoo.com
106.10.144.40	A	rri.mail.sg3.yahoo.com
106.10.144.41	PTR	c2.rri.mail.sg3.yahoo.com
106.10.144.41	A	rri.mail.sg3.yahoo.com
106.10.144.42	A+PTR	f1903.mail.vip.sg3.yahoo.com
106.10.144.42	A	f1903.mail.yahoo.com
106.10.144.42	A	us.f1903.mail.yahoo.com
106.10.144.44	PTR	unknown.yahoo.com
106.10.144.65	PTR	unknown.yahoo.com
106.10.144.65	A	web190005.mail.sg3.yahoo.com
106.10.144.68	PTR	web190103.mail.sg3.yahoo.com
106.10.144.69	PTR	web190104.mail.sg3.yahoo.com
106.10.144.70	A+PTR	web190105.mail.sg3.yahoo.com
106.10.144.126	A+PTR	web190905.mail.sg3.yahoo.com
106.10.144.159	A+PTR	fsr70333.mail.sg3.yahoo.com
106.10.144.159	A	sky11127.mail.sg3.yahoo.com
106.10.144.173	PTR	jws10915.mail.sg3.yahoo.com
106.10.144.176	A+PTR	web190017.mail.sg3.yahoo.com
106.10.144.211	A+PTR	jws10933.mail.sg3.yahoo.com
106.10.144.219	A	web190714.mail.sg3.yahoo.com
106.10.144.220	A+PTR	web190715.mail.sg3.yahoo.com
106.10.144.240	A	geoycpi-o.gy1.b.yahoo.net
106.10.144.242	A+PTR	pop.mail.vip.sg3.yahoo.com
106.10.144.242	A	imap-star.mail.sg.gm0.yahoodns.net
106.10.144.247	PTR	c5.rri.mail.sg3.yahoo.com
106.10.144.247	A	rri.mail.sg3.yahoo.com
106.10.144.251	PTR	unknown.yahoo.com
106.10.144.251	A	star.pop.mail.yahoo.com
106.10.144.251	A	pop.mail.yahoo.com.hk