Robtex

Up: 54.240.198.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 54.240.198.0/25
Down right: 54.240.198.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.240.198.1	PTR	54-240-198-1.amazon.com
54.240.198.3	PTR	54-240-198-3.amazon.com
54.240.198.6	PTR	54-240-198-6.amazon.com
54.240.198.10	A	54-240-198-10.amazon.com
54.240.198.12	PTR	54-240-198-12.amazon.com
54.240.198.13	PTR	54-240-198-13.amazon.com
54.240.198.14	PTR	54-240-198-14.amazon.com
54.240.198.15	PTR	54-240-198-15.amazon.com
54.240.198.18	A	54-240-198-18.amazon.com
54.240.198.20	PTR	54-240-198-20.amazon.com
54.240.198.21	PTR	54-240-198-21.amazon.com
54.240.198.23	PTR	54-240-198-23.amazon.com
54.240.198.24	A+PTR	54-240-198-24.amazon.com
54.240.198.28	PTR	54-240-198-28.amazon.com
54.240.198.29	PTR	54-240-198-29.amazon.com
54.240.198.33	A+PTR	54-240-198-33.amazon.com
54.240.198.34	PTR	54-240-198-34.amazon.com
54.240.198.38	PTR	54-240-198-38.amazon.com
54.240.198.40	PTR	54-240-198-40.amazon.com
54.240.198.41	A	54-240-198-41.amazon.com
54.240.198.43	PTR	54-240-198-43.amazon.com
54.240.198.44	PTR	54-240-198-44.amazon.com
54.240.198.46	PTR	54-240-198-46.amazon.com
54.240.198.49	PTR	54-240-198-49.amazon.com
54.240.198.51	PTR	54-240-198-51.amazon.com
54.240.198.52	PTR	54-240-198-52.amazon.com
54.240.198.56	PTR	54-240-198-56.amazon.com
54.240.198.57	PTR	54-240-198-57.amazon.com
54.240.198.58	PTR	54-240-198-58.amazon.com
54.240.198.59	PTR	54-240-198-59.amazon.com
54.240.198.61	PTR	54-240-198-61.amazon.com
54.240.198.63	PTR	54-240-198-63.amazon.com
54.240.198.64	PTR	54-240-198-64.amazon.com
54.240.198.67	PTR	54-240-198-67.amazon.com
54.240.198.70	PTR	54-240-198-70.amazon.com
54.240.198.71	PTR	54-240-198-71.amazon.com
54.240.198.72	PTR	54-240-198-72.amazon.com
54.240.198.73	PTR	54-240-198-73.amazon.com
54.240.198.75	PTR	54-240-198-75.amazon.com
54.240.198.76	PTR	54-240-198-76.amazon.com
54.240.198.78	PTR	54-240-198-78.amazon.com
54.240.198.79	PTR	54-240-198-79.amazon.com
54.240.198.80	PTR	54-240-198-80.amazon.com
54.240.198.81	PTR	54-240-198-81.amazon.com
54.240.198.84	PTR	54-240-198-84.amazon.com
54.240.198.92	PTR	54-240-198-92.amazon.com
54.240.198.93	PTR	54-240-198-93.amazon.com
54.240.198.96	A	54-240-198-96.amazon.com
54.240.198.97	PTR	54-240-198-97.amazon.com
54.240.198.98	PTR	54-240-198-98.amazon.com
54.240.198.99	A	54-240-198-99.amazon.com
54.240.198.100	PTR	54-240-198-100.amazon.com
54.240.198.102	PTR	54-240-198-102.amazon.com
54.240.198.103	A+PTR	54-240-198-103.amazon.com
54.240.198.113	PTR	54-240-198-113.amazon.com
54.240.198.114	PTR	54-240-198-114.amazon.com
54.240.198.118	PTR	54-240-198-118.amazon.com
54.240.198.119	PTR	54-240-198-119.amazon.com
54.240.198.122	PTR	54-240-198-122.amazon.com
54.240.198.127	A	54-240-198-127.amazon.com
54.240.198.128	PTR	54-240-198-128.amazon.com
54.240.198.131	PTR	54-240-198-131.amazon.com
54.240.198.132	PTR	54-240-198-132.amazon.com
54.240.198.133	PTR	54-240-198-133.amazon.com
54.240.198.136	PTR	54-240-198-136.amazon.com
54.240.198.137	A+PTR	54-240-198-137.amazon.com
54.240.198.138	PTR	54-240-198-138.amazon.com
54.240.198.146	PTR	54-240-198-146.amazon.com
54.240.198.147	PTR	54-240-198-147.amazon.com
54.240.198.148	PTR	54-240-198-148.amazon.com
54.240.198.150	PTR	54-240-198-150.amazon.com
54.240.198.151	A+PTR	54-240-198-151.amazon.com
54.240.198.154	A+PTR	54-240-198-154.amazon.com
54.240.198.154	A	vpn.ivpn.amazon-corp.com
54.240.198.154	A	sfo-orca-bak.amazon.com
54.240.198.156	PTR	54-240-198-156.amazon.com
54.240.198.157	PTR	54-240-198-157.amazon.com
54.240.198.158	PTR	54-240-198-158.amazon.com
54.240.198.158	A	sfo-orca-bak.amazon.com
54.240.198.158	A	sfo-orca.amazon.com
54.240.198.169	PTR	54-240-198-169.amazon.com
54.240.198.172	PTR	54-240-198-172.amazon.com
54.240.198.173	PTR	54-240-198-173.amazon.com
54.240.198.178	PTR	54-240-198-178.amazon.com
54.240.198.179	PTR	54-240-198-179.amazon.com
54.240.198.182	PTR	54-240-198-182.amazon.com
54.240.198.183	A+PTR	54-240-198-183.amazon.com
54.240.198.184	PTR	54-240-198-184.amazon.com
54.240.198.191	A+PTR	54-240-198-191.amazon.com
54.240.198.193	PTR	54-240-198-193.amazon.com
54.240.198.194	PTR	54-240-198-194.amazon.com
54.240.198.197	A	54-240-198-197.amazon.com
54.240.198.202	PTR	54-240-198-202.amazon.com
54.240.198.204	PTR	54-240-198-204.amazon.com
54.240.198.205	A+PTR	54-240-198-205.amazon.com
54.240.198.206	PTR	54-240-198-206.amazon.com
54.240.198.213	PTR	54-240-198-213.amazon.com
54.240.198.214	PTR	54-240-198-214.amazon.com
54.240.198.223	PTR	54-240-198-223.amazon.com
54.240.198.229	PTR	54-240-198-229.amazon.com
54.240.198.232	PTR	54-240-198-232.amazon.com
54.240.198.234	PTR	54-240-198-234.amazon.com
54.240.198.238	PTR	54-240-198-238.amazon.com
54.240.198.239	PTR	54-240-198-239.amazon.com
54.240.198.242	PTR	54-240-198-242.amazon.com
54.240.198.245	A+PTR	54-240-198-245.amazon.com
54.240.198.247	PTR	54-240-198-247.amazon.com
54.240.198.250	PTR	54-240-198-250.amazon.com
54.240.198.251	PTR	54-240-198-251.amazon.com
54.240.198.252	PTR	54-240-198-252.amazon.com