Robtex

Up: 93.123.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 93.123.21.0/25
Down right: 93.123.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
93.123.21.2	PTR	client-93-123-21-2.ip.daticum.com
93.123.21.23	PTR	client-93-123-21-23.ip.daticum.com
93.123.21.68	A+PTR	client-93-123-21-68.ip.daticum.com
93.123.21.89	A+PTR	mail.ontotext.com
93.123.21.89	A	mail.ontotext.net
93.123.21.90	A	ftp.ontotext.com
93.123.21.91	A	ceres.ontotext.com
93.123.21.91	A	mail0.semdata.org
93.123.21.92	PTR	client-93-123-21-92.ip.daticum.com
93.123.21.92	A	mail5.ontotext.com
93.123.21.94	A	mail5.semdata.org
93.123.21.101	A+PTR	ns.lesync.com
93.123.21.102	A+PTR	mail.lesync.com
93.123.21.103	A+PTR	client-93-123-21-103.ip.daticum.com
93.123.21.103	A	thracica.com
93.123.21.103	A	netea.bg
93.123.21.104	A+PTR	client-93-123-21-104.ip.daticum.com
93.123.21.104	A	ns2.lesync.com
93.123.21.105	PTR	client-93-123-21-105.ip.daticum.com
93.123.21.116	A+PTR	client-93-123-21-116.ip.daticum.com
93.123.21.116	A	rascalli.sirma.bg
93.123.21.116	A	istw.sirma.bg
93.123.21.121	A	client-93-123-21-121.ip.daticum.com
93.123.21.122	PTR	client-93-123-21-122.ip.daticum.com
93.123.21.122	A	factforge.net
93.123.21.122	A	bulgariana.eu
93.123.21.124	PTR	client-93-123-21-124.ip.daticum.com
93.123.21.131	PTR	client-93-123-21-131.ip.daticum.com
93.123.21.131	A	mail.nevexis.com
93.123.21.166	A	vega.exceliora.com
93.123.21.166	A	archive.exceliora.com
93.123.21.175	PTR	web.tomeko.bg
93.123.21.175	A	finox.bg
93.123.21.175	A	www.tomeko.bg
93.123.21.178	PTR	mail.exceliora.com
93.123.21.196	PTR	client-93-123-21-196.ip.daticum.com
93.123.21.196	A	enforcement-registry.net
93.123.21.202	PTR	mail2.ecopharm.bg
93.123.21.203	PTR	mail.hillclinic.com
93.123.21.204	PTR	mail.eye.bg
93.123.21.207	A+PTR	cora.filibeto.org
93.123.21.207	A	filibeto.org
93.123.21.207	A	www.filibeto.org
93.123.21.209	A+PTR	zzz1.filibeto.org
93.123.21.211	A+PTR	cora-sp.filibeto.org
93.123.21.212	A	212.daticum.com
93.123.21.217	PTR	client-93-123-21-217.ip.daticum.com
93.123.21.217	A	abilitics.com
93.123.21.219	A	mirror.daticum.com
93.123.21.222	A	client-93-123-21-222.ip.daticum.com
93.123.21.231	A+PTR	ns.daticum.com