Robtex

Up: 103.242.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.242.20.0/23
Down right: 103.242.22.0/23

IP	Type	Hostname
103.242.20.1	PTR	103.242.20-1.robi.com.bd
103.242.20.5	PTR	103.242.20-5.robi.com.bd
103.242.20.8	A+PTR	dns3.robi.com.bd
103.242.20.8	A	ns3.aktelbd.com
103.242.20.8	A	ns3.robiaxiata.com
103.242.20.15	PTR	103.242.20-15.robi.com.bd
103.242.20.35	PTR	103.242.20-35.robi.com.bd
103.242.20.35	A	dsp.adreach.com.bd
103.242.20.224	PTR	gprsc17.robi.com.bd
103.242.20.225	PTR	gprsc18.robi.com.bd
103.242.20.226	PTR	gprsc19.robi.com.bd
103.242.20.227	PTR	gprsc20.robi.com.bd
103.242.20.232	PTR	gprsc24.robi.com.bd
103.242.20.234	PTR	gprsc26.robi.com.bd
103.242.21.17	PTR	103.242.21-17.robi.com.bd
103.242.21.17	A	scontent.fcgp1-1.fna.fbcdn.net
103.242.21.18	PTR	103.242.21-18.robi.com.bd
103.242.21.18	A	video.fcgp1-1.fna.fbcdn.net
103.242.21.30	PTR	103.242.21-30.robi.com.bd
103.242.21.30	A	z-m-scontent.fcgp1-1.fna.fbcdn.net
103.242.21.32	PTR	103.242.21-32.robi.com.bd
103.242.21.32	A	z-p3-scontent.fcgp1-1.fna.fbcdn.net
103.242.21.33	PTR	103.242.21-33.robi.com.bd
103.242.21.33	A	instagram.fcgp1-1.fna.fbcdn.net
103.242.21.232	PTR	gprsc41.robi.com.bd
103.242.21.247	PTR	gprsc56.robi.com.bd
103.242.22.12	PTR	cache.google.com
103.242.22.12	A	r1.sn-gvcp5mp5u5-jb2e.googlevideo.com
103.242.22.13	PTR	cache.google.com
103.242.22.13	A	r2.sn-gvcp5mp5u5-jb2e.googlevideo.com
103.242.22.14	PTR	cache.google.com
103.242.22.14	A	r3.sn-gvcp5mp5u5-jb2e.gvt1.com
103.242.22.14	A	r3.sn-gvcp5mp5u5-jb2e.googlevideo.com
103.242.22.15	PTR	cache.google.com
103.242.22.16	A	r5.sn-gvcp5mp5u5-jb2e.googlevideo.com
103.242.22.17	PTR	cache.google.com
103.242.22.17	A	r6.sn-gvcp5mp5u5-jb2e.googlevideo.com
103.242.22.224	PTR	gprsc65.robi.com.bd
103.242.22.229	PTR	gprsc70.robi.com.bd
103.242.22.236	PTR	gprsc78.robi.com.bd
103.242.22.246	PTR	gprsc88.robi.com.bd
103.242.22.254	PTR	gprsc96.robi.com.bd
103.242.23.176	PTR	gprsc1.robi.com.bd
103.242.23.177	PTR	gprsc2.robi.com.bd
103.242.23.178	PTR	gprsc3.robi.com.bd
103.242.23.179	PTR	gprsc4.robi.com.bd
103.242.23.181	PTR	gprsc6.robi.com.bd
103.242.23.182	PTR	gprsc7.robi.com.bd
103.242.23.183	PTR	gprsc8.robi.com.bd
103.242.23.184	PTR	gprsc9.robi.com.bd
103.242.23.185	PTR	gprsc10.robi.com.bd
103.242.23.186	PTR	gprsc11.robi.com.bd
103.242.23.187	PTR	gprsc12.robi.com.bd
103.242.23.189	PTR	gprsc14.robi.com.bd
103.242.23.190	PTR	gprsc15.robi.com.bd
103.242.23.191	PTR	gprsc16.robi.com.bd
103.242.23.228	PTR	103.242.23-228.robi.com.bd
103.242.23.255	PTR	103.242.23-255.robi.com.bd