Robtex

Up: 91.245.218.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.245.218.0/25
Down right: 91.245.218.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.245.218.3	A+PTR	mail.darkserv.net
91.245.218.3	A	mail.darkdevil.dk
91.245.218.3	A	mail.king-allies.dk
91.245.218.5	PTR	ipv4.91-245-218-5.static.darkserv.net
91.245.218.5	A	darkserv.dk
91.245.218.5	A	darkserv.email
91.245.218.19	A	stfu.plzkthx.com
91.245.218.24	A+PTR	ipv4.91-245-218-24.static.darkserv.net
91.245.218.39	A+PTR	ipv4.91-245-218-39.static.darkserv.net
91.245.218.40	PTR	ipv4.91-245-218-40.static.darkserv.net
91.245.218.56	PTR	ipv4.91-245-218-56.static.darkserv.net
91.245.218.77	PTR	ipv4.91-245-218-77.static.darkserv.net
91.245.218.78	PTR	ipv4.91-245-218-78.static.darkserv.net
91.245.218.78	A	is7850.darkserv.net
91.245.218.115	A+PTR	ipv4.91-245-218-115.static.darkserv.net
91.245.218.184	A+PTR	ipv4.91-245-218-184.static.darkserv.net
91.245.218.255	PTR	ipv4.91-245-218-255.static.darkserv.net