Robtex

Up: 213.91.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 213.91.244.0/23
Down right: 213.91.246.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.91.244.2	PTR	213-91-244-2.ip.btc-net.bg
213.91.244.77	A+PTR	213-91-244-77.ip.btc-net.bg
213.91.244.77	A	mail.ics-bg.com
213.91.244.77	A	fin.ics-bg.com
213.91.244.164	PTR	213-91-244-164.ip.btc-net.bg
213.91.245.7	A	mbox.goldensands.bg
213.91.245.30	PTR	213-91-245-30.ip.btc-net.bg
213.91.245.32	PTR	213-91-245-32.ip.btc-net.bg
213.91.245.32	A	mail-relay.housesbg.com
213.91.245.32	A	factor-r.net
213.91.245.120	PTR	213-91-245-120.ip.btc-net.bg
213.91.245.255	PTR	255_245.btc-net.bg
213.91.246.29	A	ns.rkkbg.net
213.91.246.29	A	www.rkkbg.net
213.91.247.53	PTR	213-91-247-53.ip.btc-net.bg
213.91.247.97	A	www.famtex-t.net
213.91.247.97	A	mail.famtex-t.net
213.91.247.164	A	ns1.batel.bg
213.91.247.220	PTR	213-91-247-220.ip.btc-net.bg
213.91.247.220	A	ns2.elektromarket.biz
213.91.247.220	A	ns2.wbsdocs.com
213.91.247.251	PTR	213-91-247-251.ip.btc-net.bg
213.91.247.251	A	polezno-info.com
213.91.247.251	A	flagshipbg.com