Robtex

Up: 81.16.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.16.12.0/23
Down right: 81.16.14.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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