Robtex

Up: 163.121.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 163.121.4.0/25
Down right: 163.121.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
163.121.4.1	A	localrt.idsc.gov.eg
163.121.4.50	A+PTR	mx3.hosted.idsc.net.eg
163.121.4.50	A+PTR	mail.out1.idsc.net.eg
163.121.4.119	A	operator.idsc.gov.eg
163.121.4.123	A	icict.gov.eg
163.121.4.230	A	net-manage.idsc.gov.eg
163.121.4.251	PTR	mx1.hosted.idsc.net.eg
163.121.4.251	A	mx1.egypttennis.com
163.121.4.251	A	mx1.sccourt.gov.eg
163.121.4.252	A	mx2.thinktanking.idsc.gov.eg
163.121.4.252	A	mx2.amwal.gov.eg
163.121.4.252	A	mx2.anpop.org.eg
163.121.4.253	PTR	mail.arab-ita.org