Robtex

Up: 138.0.198.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 138.0.199.0/25
Down right: 138.0.199.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
138.0.199.12	PTR	cache.google.com
138.0.199.12	A	r1---sn-q5opxauxa-gxje.gvt1.com
138.0.199.12	A	r1.sn-q5opxauxa-gxje.gvt1.com
138.0.199.13	PTR	cache.google.com
138.0.199.13	A	r2---sn-q5opxauxa-gxje.gvt1.com
138.0.199.13	A	r2.sn-q5opxauxa-gxje.gvt1.com
138.0.199.14	PTR	cache.google.com
138.0.199.14	A	r3---sn-q5opxauxa-gxje.gvt1.com
138.0.199.14	A	r3.sn-q5opxauxa-gxje.gvt1.com