Robtex

Up: 80.73.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 80.73.4.0/25
Down right: 80.73.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.73.4.0	PTR	0.4.73.80.triolan.net
80.73.4.3	A	srvups.sloboda.net
80.73.4.9	PTR	termserv.sloboda.net
80.73.4.13	PTR	microsof-855f04.sloboda.net
80.73.4.23	A	ns2.designafro.ru
80.73.4.50	PTR	50.4.73.80.triolan.net
80.73.4.50	A	webinvest.kiev.ua
80.73.4.50	A	www.webinvest.kiev.ua
80.73.4.88	PTR	88.4.73.80.triolan.net
80.73.4.105	A+PTR	csserver_4.sloboda.net
80.73.4.195	PTR	postoffice.balu.net.ua
80.73.4.195	A	mail.triolan.pl.ua
80.73.4.199	PTR	199.4.73.80.triolan.net
80.73.4.202	PTR	202.4.73.80.triolan.net
80.73.4.219	PTR	219.4.73.80.triolan.net
80.73.4.219	A	mail.flametur.kiev.ua
80.73.4.230	PTR	230.4.73.80.triolan.net
80.73.4.238	PTR	microsof-855f04.sloboda.net
80.73.4.245	PTR	245.4.73.80.triolan.net
80.73.4.254	PTR	254.4.73.80.triolan.net
80.73.4.254	A	sparepart.com.ua
80.73.4.254	A	wintex.org
80.73.4.255	PTR	255.4.73.80.triolan.net