Robtex

Up: 54.231.228.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 54.231.229.0/25
Down right: 54.231.229.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.231.229.0	PTR	s3-website-ap-northeast-1.amazonaws.com
54.231.229.0	A	taiborn.com
54.231.229.0	A	businesskorea.net
54.231.229.1	A	00002.s3.amazonaws.com
54.231.229.1	A	cd-ladsp-com.s3.amazonaws.com
54.231.229.4	PTR	s3-website-ap-northeast-1.amazonaws.com
54.231.229.4	A	businesskorea.net
54.231.229.4	A	okinawa-kurasapo.com
54.231.229.5	PTR	s3-ap-northeast-1-w.amazonaws.com
54.231.229.8	PTR	s3-website-ap-northeast-1.amazonaws.com
54.231.229.8	A	okinawa-kurasapo.com
54.231.229.8	A	codexr.info
54.231.229.9	PTR	s3-ap-northeast-1-w.amazonaws.com
54.231.229.9	A	00002.s3.amazonaws.com
54.231.229.12	PTR	s3-website-ap-northeast-1.amazonaws.com
54.231.229.12	A	10mado.net
54.231.229.12	A	seraphyware.net
54.231.229.16	PTR	s3-website-ap-northeast-1.amazonaws.com
54.231.229.16	A	smartfx.jp
54.231.229.16	A	seraphyware.net
54.231.229.17	PTR	s3-ap-northeast-1-w.amazonaws.com
54.231.229.20	PTR	s3-website-ap-northeast-1.amazonaws.com
54.231.229.20	A	xn--vuqt16bqncmrqt7go0rx1nytar29f.net
54.231.229.20	A	tokyo-kazoku.jp
54.231.229.21	PTR	s3-ap-northeast-1-w.amazonaws.com
54.231.229.23	A	p1.off.travel