Robtex

Up: 54.240.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 54.240.232.0/23
Down right: 54.240.234.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.240.235.0	PTR	s3-1.amazonaws.com
54.240.235.3	PTR	s3-1.amazonaws.com
54.240.235.5	PTR	s3-1.amazonaws.com
54.240.235.8	PTR	s3-1.amazonaws.com
54.240.235.9	PTR	s3-1.amazonaws.com
54.240.235.10	PTR	s3-1.amazonaws.com
54.240.235.12	PTR	s3-1.amazonaws.com
54.240.235.15	PTR	s3-1.amazonaws.com
54.240.235.18	PTR	s3-1.amazonaws.com
54.240.235.21	PTR	s3-1.amazonaws.com
54.240.235.27	PTR	s3-1.amazonaws.com
54.240.235.64	PTR	s3-1-w.amazonaws.com
54.240.235.65	PTR	s3-1-w.amazonaws.com
54.240.235.65	A	cl11.com.s3.amazonaws.com
54.240.235.66	PTR	s3-1-w.amazonaws.com
54.240.235.66	A	*.eu.s3.amazonaws.com
54.240.235.66	A	mondoads.s3.amazonaws.com
54.240.235.67	PTR	s3-1-w.amazonaws.com
54.240.235.68	PTR	s3-1-w.amazonaws.com
54.240.235.68	A	digitallyspeaking.com.s3.amazonaws.com
54.240.235.69	PTR	s3-1-w.amazonaws.com
54.240.235.69	A	*.hubdub.com.s3.amazonaws.com
54.240.235.70	PTR	s3-1-w.amazonaws.com
54.240.235.72	PTR	s3-1-w.amazonaws.com
54.240.235.74	A	nbeshine.com.s3.amazonaws.com
54.240.235.76	A	*.halogennetwork.com.s3.amazonaws.com
54.240.235.78	PTR	s3-1-w.amazonaws.com
54.240.235.81	PTR	s3-1-w.amazonaws.com
54.240.235.82	PTR	s3-1-w.amazonaws.com
54.240.235.82	A	dl.pdflite.com.s3.amazonaws.com
54.240.235.84	PTR	s3-1-w.amazonaws.com
54.240.235.84	A	*.cmedia.s3.amazonaws.com
54.240.235.85	A	i.cl11.com.s3.amazonaws.com
54.240.235.86	PTR	s3-1-w.amazonaws.com
54.240.235.86	A	*.in.www.socratesheaders.s3.amazonaws.com
54.240.235.87	A	*.hubdub.com.s3.amazonaws.com
54.240.235.88	PTR	s3-1-w.amazonaws.com
54.240.235.89	A	*.ooyala.com.s3.amazonaws.com
54.240.235.89	A	*.mokarina.com.s3.amazonaws.com
54.240.235.90	PTR	s3-1-w.amazonaws.com
54.240.235.90	A	dl.pdflite.com.s3.amazonaws.com
54.240.235.90	A	*.potentianet.com.s3.amazonaws.com
54.240.235.91	PTR	s3-1-w.amazonaws.com
54.240.235.92	A	*.longtailvideo.com.s3.amazonaws.com
54.240.235.192	PTR	s3-website-us-east-1.amazonaws.com
54.240.235.192	A	au.s3-website-us-east-1.amazonaws.com
54.240.235.192	A	jumo.com.s3-website-us-east-1.amazonaws.com
54.240.235.193	PTR	s3-website-us-east-1.amazonaws.com
54.240.235.193	A	*.ture.com.s3-website-us-east-1.amazonaws.com
54.240.235.194	PTR	s3-website-us-east-1.amazonaws.com
54.240.235.195	PTR	s3-website-us-east-1.amazonaws.com
54.240.235.196	PTR	s3-website-us-east-1.amazonaws.com
54.240.235.196	A	smstrans.ro
54.240.235.196	A	www.youriding.com.s3-website-us-east-1.amazonaws.com
54.240.235.197	PTR	s3-website-us-east-1.amazonaws.com
54.240.235.197	A	de.s3-website-us-east-1.amazonaws.com
54.240.235.197	A	nil.mx.s3-website-us-east-1.amazonaws.com