Robtex

Up: 13.35.21.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 13.35.21.0/26
Down right: 13.35.21.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
13.35.21.6	A+PTR	server-13-35-21-6.sin5.r.cloudfront.net
13.35.21.6	A	d1w7ojgvgwt8cz.cloudfront.net
13.35.21.9	A	d2inqv4rfxy9px.cloudfront.net
13.35.21.9	A	d3oum9jtw64d8v.cloudfront.net
13.35.21.12	A+PTR	server-13-35-21-12.sin5.r.cloudfront.net
13.35.21.12	A	d3l0ct8k7gfihb.cloudfront.net
13.35.21.13	PTR	server-13-35-21-13.sin5.r.cloudfront.net
13.35.21.13	A	msf-120.m3.aftersparx.io
13.35.21.13	A	msf-110.m3.aftersparx.io
13.35.21.14	A+PTR	server-13-35-21-14.sin5.r.cloudfront.net
13.35.21.14	A	cdn-old.notonthehighstreet.com
13.35.21.15	A+PTR	server-13-35-21-15.sin5.r.cloudfront.net
13.35.21.15	A	d2a3mga0946svw.cloudfront.net
13.35.21.30	A+PTR	server-13-35-21-30.sin5.r.cloudfront.net
13.35.21.30	A	d1ryuy4y1zjdgm.cloudfront.net
13.35.21.30	A	dx5j298u9prpu.cloudfront.net
13.35.21.33	A+PTR	server-13-35-21-33.sin5.r.cloudfront.net
13.35.21.33	A	d32bxnknj3qf2z.cloudfront.net
13.35.21.36	A+PTR	server-13-35-21-36.sin5.r.cloudfront.net
13.35.21.36	A	derrd5uxbh7gp.cloudfront.net
13.35.21.41	A+PTR	server-13-35-21-41.sin5.r.cloudfront.net
13.35.21.41	A	admin.litmuscdn.com
13.35.21.46	A+PTR	server-13-35-21-46.sin5.r.cloudfront.net
13.35.21.46	A	d1k3py0luhk1oe.cloudfront.net
13.35.21.48	A+PTR	server-13-35-21-48.sin5.r.cloudfront.net
13.35.21.48	A	d3ry8rgwf2p25y.cloudfront.net
13.35.21.57	A+PTR	server-13-35-21-57.sin5.r.cloudfront.net
13.35.21.57	A	res.booklive.jp
13.35.21.74	A+PTR	server-13-35-21-74.sin5.r.cloudfront.net
13.35.21.74	A	d1imc78vac7a0x.cloudfront.net
13.35.21.75	A+PTR	server-13-35-21-75.sin5.r.cloudfront.net
13.35.21.75	A	ds5hrp6nkramd.cloudfront.net
13.35.21.79	A+PTR	server-13-35-21-79.sin5.r.cloudfront.net
13.35.21.79	A	d3qnr1m59zehbb.cloudfront.net
13.35.21.79	A	d2did1ej1vlb4r.cloudfront.net
13.35.21.90	A+PTR	server-13-35-21-90.sin5.r.cloudfront.net
13.35.21.90	A	d28h6ow96o3boa.cloudfront.net
13.35.21.103	A+PTR	server-13-35-21-103.sin5.r.cloudfront.net
13.35.21.103	A	ftb.forgecdn.net
13.35.21.106	A+PTR	server-13-35-21-106.sin5.r.cloudfront.net
13.35.21.106	A	d11ggbkscypvz6.cloudfront.net
13.35.21.116	A+PTR	server-13-35-21-116.sin5.r.cloudfront.net
13.35.21.116	A	d1j45cy24nywts.cloudfront.net