Robtex

Up: 91.82.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 91.82.16.0/22
Down right: 91.82.20.0/22

IP	Type	Hostname
91.82.18.2	PTR	91-82-18-2.pool.hfcnetwork.hu
91.82.18.15	A	91-82-18-15.pool.hfcnetwork.hu
91.82.18.21	A	91-82-18-21.pool.hfcnetwork.hu
91.82.19.137	A	inet-firewall.fazekas-bereczki.com
91.82.19.137	A	firewall.fazekas-bereczki.com
91.82.19.147	A+PTR	mail.gtrt.hu
91.82.20.2	PTR	host-2.ah.inectel.net
91.82.21.211	PTR	host-211.zs.inectel.net
91.82.23.1	PTR	mail.zelebau.hu