Robtex

Up: 64.15.120.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.15.121.0/25
Down right: 64.15.121.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.15.121.12	PTR	cache.google.com
64.15.121.12	A	r1.sn-bvvbax-3uhe.googlevideo.com
64.15.121.12	A	r1.sn-bvvbax-3uhe.gvt1.com
64.15.121.13	PTR	cache.google.com
64.15.121.13	A	r2.sn-bvvbax-3uhe.gvt1.com
64.15.121.13	A	r2.sn-bvvbax-3uhe.googlevideo.com
64.15.121.14	PTR	cache.google.com
64.15.121.14	A	r3.sn-bvvbax-3uhe.googlevideo.com
64.15.121.14	A	r3.sn-bvvbax-3uhe.gvt1.com
64.15.121.15	PTR	cache.google.com
64.15.121.15	A	r4.sn-bvvbax-3uhe.gvt1.com
64.15.121.15	A	r4.sn-bvvbax-3uhe.googlevideo.com
64.15.121.16	PTR	cache.google.com
64.15.121.16	A	r5.sn-bvvbax-3uhe.googlevideo.com
64.15.121.16	A	r5.sn-bvvbax-3uhe.gvt1.com
64.15.121.17	A	r6.sn-bvvbax-3uhe.gvt1.com
64.15.121.18	A	r7.sn-bvvbax-3uhe.gvt1.com
64.15.121.18	A	r7.sn-bvvbax-3uhe.googlevideo.com
64.15.121.19	A	r8.sn-bvvbax-3uhe.gvt1.com
64.15.121.20	PTR	cache.google.com
64.15.121.20	A	r1---sn-bvvbax-hp5ze.gvt1.com
64.15.121.20	A	r1.sn-bvvbax-hp5ze.gvt1.com
64.15.121.21	PTR	cache.google.com
64.15.121.21	A	r2---sn-bvvbax-hp5ze.gvt1.com
64.15.121.21	A	r2.sn-bvvbax-hp5ze.googlevideo.com
64.15.121.22	PTR	cache.google.com
64.15.121.22	A	r3---sn-bvvbax-hp5ze.gvt1.com
64.15.121.22	A	r3---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.23	PTR	cache.google.com
64.15.121.23	A	r4.sn-bvvbax-hp5ze.gvt1.com
64.15.121.23	A	r4---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.24	PTR	cache.google.com
64.15.121.24	A	r5---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.24	A	r5.sn-bvvbax-hp5ze.gvt1.com
64.15.121.25	PTR	cache.google.com
64.15.121.25	A	r6.sn-bvvbax-hp5ze.gvt1.com
64.15.121.25	A	r6---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.26	PTR	cache.google.com
64.15.121.26	A	r7---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.26	A	r7.sn-bvvbax-hp5ze.googlevideo.com
64.15.121.27	PTR	cache.google.com
64.15.121.27	A	r8---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.27	A	r8.sn-bvvbax-hp5ze.gvt1.com
64.15.121.28	PTR	cache.google.com
64.15.121.28	A	r9.sn-bvvbax-hp5ze.c.doc-0-0-sj.sj.googleusercontent.com
64.15.121.28	A	r9---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.29	PTR	cache.google.com
64.15.121.29	A	r10---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.29	A	r10---sn-bvvbax-hp5ze.gvt1.com
64.15.121.30	PTR	cache.google.com
64.15.121.30	A	r11.sn-bvvbax-hp5ze.gvt1.com
64.15.121.30	A	r11.sn-bvvbax-hp5ze.c.doc-0-0-sj.sj.googleusercontent.com
64.15.121.31	PTR	cache.google.com
64.15.121.31	A	r12.sn-bvvbax-hp5ze.c.android.clients.google.com
64.15.121.31	A	r12.sn-bvvbax-hp5ze.c.2mdn.net
64.15.121.32	PTR	cache.google.com
64.15.121.32	A	r13.sn-bvvbax-hp5ze.gvt1.com
64.15.121.32	A	r13.sn-bvvbax-hp5ze.googlevideo.com
64.15.121.33	PTR	cache.google.com
64.15.121.33	A	r14---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.33	A	r14---sn-bvvbax-hp5ze.gvt1.com
64.15.121.34	PTR	cache.google.com
64.15.121.34	A	r15---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.34	A	r15.sn-bvvbax-hp5ze.gvt1.com
64.15.121.35	PTR	cache.google.com
64.15.121.35	A	r16---sn-bvvbax-hp5ze.gvt1.com
64.15.121.35	A	r16---sn-bvvbax-hp5ze.googlevideo.com
64.15.121.39	PTR	cache.google.com
64.15.121.42	PTR	cache.google.com
64.15.121.49	PTR	cache.google.com
64.15.121.52	PTR	cache.google.com
64.15.121.54	PTR	cache.google.com
64.15.121.56	PTR	cache.google.com
64.15.121.60	PTR	cache.google.com
64.15.121.62	PTR	cache.google.com
64.15.121.63	PTR	cache.google.com
64.15.121.76	PTR	cache.google.com
64.15.121.76	A	r1.sn-bvvbax-3uhl.googlevideo.com
64.15.121.76	A	r1.sn-bvvbax-3uhl.gvt1.com
64.15.121.77	A	r2.sn-bvvbax-3uhl.googlevideo.com
64.15.121.77	A	r2.sn-bvvbax-3uhl.gvt1.com
64.15.121.78	PTR	cache.google.com
64.15.121.78	A	r3.sn-bvvbax-3uhl.gvt1.com
64.15.121.78	A	r3.sn-bvvbax-3uhl.googlevideo.com
64.15.121.79	PTR	cache.google.com
64.15.121.79	A	r4.sn-bvvbax-3uhl.googlevideo.com
64.15.121.79	A	r4.sn-bvvbax-3uhl.gvt1.com
64.15.121.80	PTR	cache.google.com
64.15.121.80	A	r5.sn-bvvbax-3uhl.googlevideo.com
64.15.121.80	A	r5.sn-bvvbax-3uhl.gvt1.com
64.15.121.81	A	r6.sn-bvvbax-3uhl.googlevideo.com
64.15.121.81	A	r6.sn-bvvbax-3uhl.gvt1.com
64.15.121.82	PTR	cache.google.com
64.15.121.82	A	r7.sn-bvvbax-3uhl.googlevideo.com
64.15.121.83	A	r8.sn-bvvbax-3uhl.gvt1.com
64.15.121.83	A	r8.sn-bvvbax-3uhl.googlevideo.com
64.15.121.124	PTR	cache.google.com
64.15.121.136	PTR	cache.google.com
64.15.121.151	PTR	cache.google.com
64.15.121.213	PTR	cache.google.com
64.15.121.245	PTR	cache.google.com
64.15.121.252	PTR	cache.google.com