Robtex

Up: 54.239.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 54.239.31.0/25
Down right: 54.239.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.239.31.3	A	rds.us-east-1.amazonaws.com
54.239.31.29	A	firehose-fips.us-east-1.amazonaws.com
54.239.31.33	A	aip-hyprank-heimdall-na-gamma.amazon.com
54.239.31.44	A	mytime-wdm-ext-iad.amazon.com
54.239.31.46	A	alexa-calendar-notification-preview.amazon.com
54.239.31.51	A	aip-deesos-hyprank-gamma-na.amazon.com
54.239.31.54	A	alexa-service-gamma-skill-attribution.amazon.com
54.239.31.55	A	aip-deesos-shortlister-gamma-na.amazon.com
54.239.31.58	A	devicebackupandrestore.amazon.com
54.239.31.60	A	origin-www.audible.com
54.239.31.60	A	audible.com
54.239.31.60	A	www.audible.com
54.239.31.62	A	amazonpublishing.amazon.com
54.239.31.67	A	route53.amazonaws.com
54.239.31.69	A	amazonaws-china.com
54.239.31.69	A	amazonawsbr.com
54.239.31.69	A	titimomo.com
54.239.31.70	A	autoscaling.us-east-1.amazonaws.com
54.239.31.78	A	directconnect.us-east-1.amazonaws.com
54.239.31.83	A	lightsail.aws.amazon.com
54.239.31.94	A	redshift.us-east-1.amazonaws.com
54.239.31.104	A	todo-ta-g7g.amazon.com
54.239.31.115	A	logistics.amazon.com.mx
54.239.31.124	A	requestersandbox.mturk.com
54.239.31.126	A	webservices.amazon.com.mx
54.239.31.126	A	soap.amazon.com
54.239.31.126	A	webservices.amazon.com
54.239.31.128	A	s3-console-1.amazonaws.com
54.239.31.129	A	amazonaws-china.com
54.239.31.129	A	worldwidessl.net
54.239.31.129	A	hethongkinhdoanhtudong.com
54.239.31.135	A	mcconsole-preivew.aws.amazon.com
54.239.31.141	A	firs-ta-g7g-preprod.amazon.com
54.239.31.142	A	andes-service.amazon.com
54.239.31.144	A	fortanium-na.amazon.com
54.239.31.167	A	elasticbeanstalk.us-east-1.amazonaws.com
54.239.31.174	A	mcconsole-preivew.aws.amazon.com
54.239.31.183	A	waf.amazonaws.com
54.239.31.188	A	s3-console-1.amazonaws.com
54.239.31.193	A	directconnect.us-east-1.amazonaws.com
54.239.31.195	A	adg-discovery.amazon.com
54.239.31.204	A	ams.amazon.com.mx
54.239.31.205	A	ams.amazon.ca
54.239.31.206	A	payments-na.amazon.com
54.239.31.207	A	thexba.net
54.239.31.207	A	mailstore1.secureserver.net.thexba.net
54.239.31.225	A	logs.us-east-1.amazonaws.com
54.239.31.237	A	mlis.amazon.com
54.239.31.255	A	adg-discovery.amazon.com