Robtex

Up: 103.16.200.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.16.204.0/23
Down right: 103.16.206.0/23

IP	Type	Hostname
103.16.204.13	A	r2.sn-w5nuxa-o53z.googlevideo.com
103.16.204.15	A	r4.sn-w5nuxa-o53z.gvt1.com
103.16.204.15	A	r4.sn-w5nuxa-o53z.googlevideo.com
103.16.204.16	A	r5.sn-w5nuxa-o53z.googlevideo.com
103.16.204.17	A	r6.sn-w5nuxa-o53z.googlevideo.com
103.16.204.18	A	r7.sn-w5nuxa-o53z.googlevideo.com
103.16.204.19	A	r8.sn-w5nuxa-o53z.googlevideo.com
103.16.204.81	A	r6.sn-w5nuxa-a2ue.googlevideo.com
103.16.204.82	A	r7.sn-w5nuxa-a2ue.googlevideo.com
103.16.204.83	A	r8.sn-w5nuxa-a2ue.googlevideo.com
103.16.204.140	A	r1.sn-w5nuxa-0uie.googlevideo.com
103.16.204.141	A	r2.sn-w5nuxa-0uie.googlevideo.com
103.16.204.141	A	r2---sn-w5nuxa-0uie.googlevideo.com
103.16.204.142	A	r3.sn-w5nuxa-0uie.googlevideo.com
103.16.204.144	A	r5.sn-w5nuxa-0uie.googlevideo.com
103.16.204.145	A	r6---sn-w5nuxa-0uie.googlevideo.com
103.16.204.145	A	r6.sn-w5nuxa-0uie.googlevideo.com
103.16.204.146	A	r7---sn-w5nuxa-0uie.googlevideo.com
103.16.204.204	A	r1.sn-w5nuxa-u3ie.googlevideo.com
103.16.204.206	A	r3.sn-w5nuxa-u3ie.googlevideo.com
103.16.204.208	A	r5.sn-w5nuxa-u3ie.googlevideo.com
103.16.204.209	A	r6.sn-w5nuxa-u3ie.googlevideo.com
103.16.205.13	A	r2.sn-w5nuxa-0c2e.googlevideo.com
103.16.205.15	A	r4.sn-w5nuxa-0c2e.gvt1.com
103.16.205.16	A	r5.sn-w5nuxa-0c2e.googlevideo.com
103.16.205.18	A	r7.sn-w5nuxa-0c2e.googlevideo.com
103.16.205.19	A	r8.sn-w5nuxa-0c2e.gvt1.com
103.16.205.132	PTR	rsv16.3bb.co.th
103.16.205.181	PTR	rsv65.3bb.co.th
103.16.205.185	PTR	rsv69.3bb.co.th
103.16.205.186	PTR	rsv70.3bb.co.th
103.16.205.187	PTR	rsv71.3bb.co.th
103.16.207.12	A	r1.sn-w5nuxa-33hl.googlevideo.com
103.16.207.14	A	r3.sn-w5nuxa-33hl.googlevideo.com
103.16.207.15	A	r4.sn-w5nuxa-33hl.googlevideo.com
103.16.207.16	A	r5.sn-w5nuxa-33hl.googlevideo.com
103.16.207.17	A	r6.sn-w5nuxa-33hl.googlevideo.com
103.16.207.18	A	r7.sn-w5nuxa-33hl.googlevideo.com
103.16.207.76	A	r1.sn-w5nuxa-0guz.googlevideo.com
103.16.207.77	A	r2.sn-w5nuxa-0guz.googlevideo.com
103.16.207.82	A	r7.sn-w5nuxa-0guz.googlevideo.com
103.16.207.140	A	r1.sn-w5nuxa-2inz.googlevideo.com
103.16.207.141	A	r2.sn-w5nuxa-2inz.gvt1.com
103.16.207.141	A	r2.sn-w5nuxa-2inz.googlevideo.com
103.16.207.141	A	r2---sn-w5nuxa-2inz.googlevideo.com
103.16.207.144	A	r5---sn-w5nuxa-2inz.googlevideo.com
103.16.207.144	A	r5.sn-w5nuxa-2inz.googlevideo.com
103.16.207.145	A	r6.sn-w5nuxa-2inz.gvt1.com
103.16.207.146	A	r7---sn-w5nuxa-2inz.googlevideo.com
103.16.207.204	A	r1.sn-w5nuxa-2tm6.googlevideo.com
103.16.207.205	A	r2.sn-w5nuxa-2tm6.googlevideo.com
103.16.207.207	A	r4.sn-w5nuxa-2tm6.googlevideo.com
103.16.207.208	A	r5.sn-w5nuxa-2tm6.googlevideo.com
103.16.207.209	A	r6.sn-w5nuxa-2tm6.gvt1.com
103.16.207.210	A	r7.sn-w5nuxa-2tm6.googlevideo.com