Robtex

Up: 91.197.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 91.197.18.0/24
Down right: 91.197.19.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.197.18.1	PTR	nas-01.astra.od.ua
91.197.18.3	A+PTR	imtp.ua
91.197.18.3	A	mx1.ilport.com.ua
91.197.18.3	A	mx1.imtp.ua
91.197.18.4	A+PTR	imtp.ua
91.197.18.4	A	mx2.ilport.com.ua
91.197.18.4	A	mx2.imtp.ua
91.197.18.8	PTR	mail.rbs.org.ua
91.197.18.20	A+PTR	mail1.odysseya.com.ua
91.197.18.25	PTR	host.25.net18.astra.od.ua
91.197.18.35	A+PTR	mail.madis.com.ua
91.197.18.39	PTR	host-39-net-18.astra.od.ua
91.197.18.44	A+PTR	mail.mcu.od.ua
91.197.18.44	A	mailadmin.mcu.od.ua
91.197.18.46	PTR	host-46-net-18.astra.od.ua
91.197.18.46	A	www.mcu.od.ua
91.197.18.46	A	mcu.od.ua
91.197.18.48	A	mail.risoil.com.ua
91.197.18.50	PTR	elbrus-soft.com
91.197.18.50	A	mx20.elbrus-soft.com
91.197.18.50	A	mx20.sigomarine.com
91.197.18.52	PTR	host.52.net18.astra.od.ua
91.197.18.53	A	mit.astra.od.ua
91.197.18.85	PTR	eliteblacksea.od.ua
91.197.18.87	A	delta.serveradmin.com.ua
91.197.18.148	A	mail.risoil.com.ua
91.197.18.153	A	vrgroup.info
91.197.18.176	PTR	host-176-net-18.astra.od.ua
91.197.18.224	PTR	host-224-net-18.astra.od.ua
91.197.18.224	A	www.chernomorsk.com.ua
91.197.18.224	A	seagull-dragobrat.com
91.197.18.228	PTR	host-228-net-18.astra.od.ua
91.197.18.228	A	my-csgo.ru
91.197.19.1	PTR	nas-01.astra.od.ua
91.197.19.4	PTR	host-4-net-19.astra.od.ua
91.197.19.4	A	getnextv.net
91.197.19.13	PTR	host-13-net-19.astra.od.ua
91.197.19.22	PTR	host-22-net-19.astra.od.ua
91.197.19.26	PTR	host-26-net-19.astra.od.ua
91.197.19.35	PTR	host-35-net-19.astra.od.ua
91.197.19.35	A	www.imrp.com.ua
91.197.19.35	A	imrp.com.ua
91.197.19.36	PTR	host.36.net19.astra.od.ua
91.197.19.36	A	alefport.com
91.197.19.36	A	www.alefport.com
91.197.19.37	PTR	host.37.net19.astra.od.ua
91.197.19.38	A+PTR	mail1.imrp.com.ua
91.197.19.38	A	mail.imrp.com.ua
91.197.19.38	A	mail1.alefport.com
91.197.19.41	PTR	host-41-net-19.astra.od.ua
91.197.19.42	A+PTR	mail2.imrp.com.ua
91.197.19.48	PTR	host-48-net-19.astra.od.ua
91.197.19.51	PTR	host-51-net-19.astra.od.ua
91.197.19.54	A	tv.astra.od.ua
91.197.19.55	PTR	stat.astra.od.ua
91.197.19.59	PTR	cacti.astra.od.ua
91.197.19.97	PTR	host-97-net-19.astra.od.ua
91.197.19.102	PTR	host-102-net-19.astra.od.ua
91.197.19.104	PTR	host.104.net19.astra.od.ua
91.197.19.110	A+PTR	host-110-net-19.astra.od.ua
91.197.19.145	PTR	nas-02.astra.od.ua
91.197.19.154	PTR	host.154.net19.astra.od.ua
91.197.19.155	PTR	host-155-net-19.astra.od.ua
91.197.19.156	PTR	host-156-net-19.astra.od.ua
91.197.19.161	PTR	host-161-net-19.astra.od.ua
91.197.19.167	PTR	host.167.net19.astra.od.ua
91.197.19.167	A	ns1.rigreo.at
91.197.19.207	PTR	host-207-net-19.astra.od.ua
91.197.19.212	PTR	host-212-net-19.astra.od.ua
91.197.19.214	A+PTR	host-214-net-19.astra.od.ua
91.197.19.254	PTR	host.254.net19.astra.od.ua
91.197.19.254	A	hydro.od.ua