Robtex

Up: 81.16.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.16.0.0/21
Down right: 81.16.8.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.16.0.41	PTR	aal-mikrotik.ucom.am
81.16.0.41	A	aal-linux.icon.am
81.16.0.42	A+PTR	aal.icon.am
81.16.0.44	A	aal-linux.icon.am
81.16.0.67	PTR	host-67.0.16.81.ucom.am
81.16.0.69	A	monitoring.icon.am
81.16.0.70	A+PTR	amm1.gcn.icon.am
81.16.0.70	A	ns.icon.am
81.16.0.70	A	amm1.cust.icon.am
81.16.0.80	A+PTR	amm2.gcn.icon.am
81.16.0.80	A	ns2.icon.am
81.16.0.80	A	amm2.cust.icon.am
81.16.0.125	A+PTR	mx.icon.am
81.16.0.130	A+PTR	ns1.icon.am
81.16.0.131	A+PTR	www.icon.am
81.16.0.131	A	icon.am
81.16.0.133	A+PTR	smtp.icon.am
81.16.1.2	PTR	host-2.1.16.81.ucom.am
81.16.1.5	PTR	host-5.1.16.81.ucom.am
81.16.1.26	PTR	norayr.am
81.16.1.26	PTR	arnet.am
81.16.1.26	PTR	lab.am
81.16.1.122	PTR	host-122.1.16.81.ucom.am
81.16.1.122	A	dvwdm.com
81.16.2.5	PTR	host-5.2.16.81.ucom.am
81.16.2.9	PTR	host-9.2.16.81.ucom.am
81.16.2.9	A	www.thesarmen.com
81.16.2.9	A	thesarmen.com
81.16.2.10	A+PTR	cachebox1.icon.am
81.16.2.11	A	cachebox2.icon.am
81.16.2.194	PTR	icon-smtp.masys.am
81.16.2.196	PTR	www.translator.am
81.16.3.206	A	mail1.ypc.am
81.16.3.215	PTR	mail.f5.am
81.16.3.235	PTR	host-235.3.16.81.ucom.am
81.16.4.45	PTR	host-45.4.16.81.ucom.am
81.16.4.45	A	mail.jinjconsult.com
81.16.4.58	A+PTR	mail.caps.am
81.16.4.58	A	web.caps.am
81.16.4.67	PTR	ns.r2e2.am
81.16.4.68	PTR	mx.r2e2.am
81.16.5.35	PTR	mail.haypost.am
81.16.5.42	PTR	captiveportal.ucom.am
81.16.5.42	A	captiveportal.icon.am
81.16.5.101	PTR	mail.epygiarm.am
81.16.5.174	PTR	ms.armsoft.am
81.16.5.250	PTR	mail.lifeinfo.am
81.16.6.96	PTR	dilekpc.cust.icon.am
81.16.8.105	PTR	host-105.8.16.81.ucom.am
81.16.8.105	A	ns1.vanadzor.org
81.16.8.177	PTR	host-177.8.16.81.ucom.am
81.16.8.220	PTR	host-220.8.16.81.ucom.am
81.16.8.245	A	mail.normancredit.am
81.16.9.2	PTR	host-2.9.16.81.ucom.am
81.16.9.20	PTR	mail.myhost.am
81.16.9.20	PTR	ns1.myhost.am
81.16.9.20	A	narek-travel.com
81.16.9.50	PTR	host-50.9.16.81.ucom.am
81.16.9.113	PTR	host-113.9.16.81.ucom.am
81.16.9.113	A	delta.yessofts.com
81.16.9.186	A	ns1.mskh.am
81.16.9.186	A	b4.mskh.am
81.16.9.221	PTR	host-221.9.16.81.ucom.am
81.16.9.221	A	drivers.am
81.16.9.221	A	ns1.erevan.am
81.16.10.13	PTR	host-13.10.16.81.ucom.am
81.16.10.13	A	azerin.tk
81.16.10.22	A+PTR	ns2.myhost.am
81.16.10.93	A	7or.am
81.16.10.93	A	ns1.7or.am
81.16.10.101	PTR	host-101.10.16.81.ucom.am
81.16.10.158	PTR	host-158.10.16.81.ucom.am
81.16.10.206	PTR	enok-pc.cust.icon.am
81.16.10.254	PTR	host-254.10.16.81.ucom.am
81.16.11.26	PTR	host-26.11.16.81.ucom.am
81.16.11.95	PTR	host-95.11.16.81.ucom.am
81.16.11.224	PTR	host-224.11.16.81.ucom.am
81.16.11.252	PTR	host-252.11.16.81.ucom.am
81.16.13.42	PTR	host-42.13.16.81.ucom.am
81.16.13.42	A	okfqibhzxczzdqjwnqd.com
81.16.13.42	A	ingdirect.info
81.16.15.3	PTR	ic-smtp.digammasoft.am
81.16.15.58	PTR	mail.byuregh.am
81.16.15.170	A	mail.onclinicani.am