Robtex

Up: 192.0.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.0.43.0/25
Down right: 192.0.43.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.0.43.1	PTR	43-1.any.icann.org
192.0.43.2	PTR	43-2.any.icann.org
192.0.43.3	PTR	43-3.any.icann.org
192.0.43.4	PTR	43-4.any.icann.org
192.0.43.5	PTR	43-5.any.icann.org
192.0.43.7	A+PTR	icann.org
192.0.43.8	PTR	43-8.any.icann.org
192.0.43.8	A	iana.com
192.0.43.8	A	iana.net
192.0.43.9	PTR	43-9.any.icann.org
192.0.43.9	A	internic.net
192.0.43.9	A	wdprs.internic.net
192.0.43.10	PTR	43-10.any.icann.org
192.0.43.10	A	astcs.org
192.0.43.10	A	divenewsletters.com
192.0.43.11	PTR	43-11.any.icann.org
192.0.43.12	PTR	43-12.any.icann.org
192.0.43.12	A	itar.iana.org
192.0.43.12	A	res-dom.iana.org
192.0.43.14	PTR	43-14.any.icann.org
192.0.43.15	A+PTR	splunk-receiver.icann.org
192.0.43.18	PTR	43-18.any.icann.org
192.0.43.20	PTR	43-20.any.icann.org
192.0.43.21	PTR	43-21.any.icann.org
192.0.43.22	PTR	43-22.any.icann.org
192.0.43.22	A	icannpassport.com
192.0.43.22	A	dns-cert.net
192.0.43.23	PTR	43-23.any.icann.org
192.0.43.29	PTR	43-29.any.icann.org
192.0.43.30	PTR	43-30.any.icann.org
192.0.43.32	PTR	43-32.any.icann.org
192.0.43.33	PTR	43-33.any.icann.org
192.0.43.33	A	www.icannmeeting.org
192.0.43.33	A	icannmeeting.org
192.0.43.41	PTR	43-41.any.icann.org
192.0.43.47	PTR	43-47.any.icann.org
192.0.43.50	PTR	43-50.any.icann.org
192.0.43.54	PTR	43-54.any.icann.org
192.0.43.72	PTR	43-72.any.icann.org
192.0.43.76	PTR	43-76.any.icann.org
192.0.43.77	PTR	43-77.any.icann.org
192.0.43.86	PTR	43-86.any.icann.org
192.0.43.88	PTR	43-88.any.icann.org
192.0.43.90	PTR	43-90.any.icann.org
192.0.43.92	PTR	43-92.any.icann.org
192.0.43.93	PTR	43-93.any.icann.org
192.0.43.95	PTR	43-95.any.icann.org
192.0.43.101	PTR	43-101.any.icann.org
192.0.43.103	PTR	43-103.any.icann.org
192.0.43.104	PTR	43-104.any.icann.org
192.0.43.105	PTR	43-105.any.icann.org
192.0.43.114	PTR	43-114.any.icann.org
192.0.43.121	PTR	43-121.any.icann.org
192.0.43.125	PTR	43-125.any.icann.org
192.0.43.126	PTR	43-126.any.icann.org
192.0.43.129	PTR	43-129.any.icann.org
192.0.43.141	PTR	43-141.any.icann.org
192.0.43.143	PTR	43-143.any.icann.org
192.0.43.144	PTR	43-144.any.icann.org
192.0.43.145	PTR	43-145.any.icann.org
192.0.43.150	PTR	43-150.any.icann.org
192.0.43.152	PTR	43-152.any.icann.org
192.0.43.154	PTR	43-154.any.icann.org
192.0.43.163	PTR	43-163.any.icann.org
192.0.43.176	PTR	43-176.any.icann.org
192.0.43.184	PTR	43-184.any.icann.org
192.0.43.185	PTR	43-185.any.icann.org
192.0.43.188	PTR	43-188.any.icann.org
192.0.43.197	PTR	43-197.any.icann.org
192.0.43.199	PTR	43-199.any.icann.org
192.0.43.203	PTR	43-203.any.icann.org
192.0.43.204	PTR	43-204.any.icann.org
192.0.43.207	PTR	43-207.any.icann.org
192.0.43.212	PTR	43-212.any.icann.org
192.0.43.218	PTR	43-218.any.icann.org
192.0.43.223	PTR	43-223.any.icann.org
192.0.43.226	PTR	43-226.any.icann.org
192.0.43.227	PTR	43-227.any.icann.org
192.0.43.228	PTR	43-228.any.icann.org
192.0.43.238	PTR	43-238.any.icann.org
192.0.43.245	PTR	43-245.any.icann.org
192.0.43.246	PTR	43-246.any.icann.org
192.0.43.254	PTR	43-254.any.icann.org