Robtex

Up: 172.217.13.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 172.217.13.0/26
Down right: 172.217.13.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
172.217.13.1	A+PTR	atl14s90-in-f1.1e100.net
172.217.13.3	A+PTR	atl14s90-in-f3.1e100.net
172.217.13.10	A+PTR	atl14s90-in-f10.1e100.net
172.217.13.14	A+PTR	atl14s90-in-f14.1e100.net
172.217.13.16	A+PTR	atl14s90-in-f16.1e100.net
172.217.13.19	A+PTR	atl14s90-in-f19.1e100.net
172.217.13.22	A+PTR	atl14s90-in-f22.1e100.net
172.217.13.65	PTR	iad23s60-in-f1.1e100.net
172.217.13.65	A	storage-ugc.l.googleusercontent.com
172.217.13.65	A	packsmegapremium.blogspot.com
172.217.13.66	A+PTR	iad23s60-in-f2.1e100.net
172.217.13.67	PTR	iad23s60-in-f3.1e100.net
172.217.13.67	A	gogle.ch
172.217.13.67	A	p4-almf3feknzhp4-7kb6iuborveoznys-456633-s1-v6exp3-v4.metric.gstatic.com
172.217.13.68	PTR	iad23s60-in-f4.1e100.net
172.217.13.68	A	googlereviews.fr
172.217.13.68	A	recapcha.com
172.217.13.69	A+PTR	iad23s60-in-f5.1e100.net
172.217.13.70	A+PTR	iad23s60-in-f6.1e100.net
172.217.13.71	A+PTR	iad23s60-in-f7.1e100.net
172.217.13.72	A+PTR	iad23s60-in-f8.1e100.net
172.217.13.73	A+PTR	iad23s60-in-f9.1e100.net
172.217.13.73	A	blogger.jp
172.217.13.73	A	blogspot.hk
172.217.13.74	A+PTR	iad23s60-in-f10.1e100.net
172.217.13.74	A	oauthintegrations.clients6.google.com
172.217.13.76	A+PTR	iad23s60-in-f12.1e100.net
172.217.13.77	A+PTR	iad23s60-in-f13.1e100.net
172.217.13.78	PTR	iad23s60-in-f14.1e100.net
172.217.13.78	A	d-3040487837244075096.ampproject.net
172.217.13.78	A	d-32385984523289509709.ampproject.net
172.217.13.80	A+PTR	iad23s60-in-f16.1e100.net
172.217.13.80	A	yvestumor.com
172.217.13.81	A+PTR	iad23s60-in-f17.1e100.net
172.217.13.81	A	sri-sunset.withgoogle.com
172.217.13.81	A	evart.withgoogle.com
172.217.13.82	PTR	iad23s60-in-f18.1e100.net
172.217.13.82	A	p5-gzfv6agx5zp2i-v4gtvltccdrolll5-840278-i1-v6exp3.ds.metric.gstatic.com
172.217.13.82	A	p4-bxzvy2equj72u-ovv4ayz53vgxvk3w-720889-i2-v6exp3.ds.metric.gstatic.com
172.217.13.83	PTR	iad23s60-in-f19.1e100.net
172.217.13.83	A	softonx.com
172.217.13.83	A	lms.paxpat.com
172.217.13.84	A+PTR	iad23s60-in-f20.1e100.net
172.217.13.84	A	goldmedalspool-dot-yamm-track.appspot.com
172.217.13.97	A+PTR	yul02s04-in-f1.1e100.net
172.217.13.98	A+PTR	yul02s04-in-f2.1e100.net
172.217.13.99	A+PTR	yul02s04-in-f3.1e100.net
172.217.13.99	A	alt25.gstatic.com
172.217.13.99	A	alt17.gstatic.com
172.217.13.101	A+PTR	yul02s04-in-f5.1e100.net
172.217.13.101	A	alt3.googlemail.com
172.217.13.101	A	mail.sourphagop.net
172.217.13.104	A+PTR	yul02s04-in-f8.1e100.net
172.217.13.106	A+PTR	yul02s04-in-f10.1e100.net
172.217.13.110	A+PTR	yul02s04-in-f14.1e100.net
172.217.13.110	A	o-o.preferred.kabelbw-str1.v7.lscache3.c.youtube.com
172.217.13.110	A	o-o.preferred.kabelbw-str1.v24.lscache4.c.youtube.com
172.217.13.111	PTR	yul02s04-in-f15.1e100.net
172.217.13.115	A+PTR	yul02s04-in-f19.1e100.net
172.217.13.115	A	laaa-magog.com
172.217.13.118	A	yul02s04-in-f22.1e100.net