Robtex

Up: 81.161.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.161.240.0/25
Down right: 81.161.240.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.161.240.1	A+PTR	gate2.tu-sofia.bg
81.161.240.3	A+PTR	www.tu-sofia.bg
81.161.240.3	A	priem.tu-sofia.bg
81.161.240.3	A	tu-sofia.bg
81.161.240.4	A	cir2106-2.tu-sofia.bg
81.161.240.6	A	cir2103b-2.tu-sofia.bg
81.161.240.7	A	print-server.tu-sofia.bg
81.161.240.8	A	2104a-pjordan.tu-sofia.bg
81.161.240.9	PTR	ksk-router.tu-sofia.bg
81.161.240.10	A+PTR	ns.tu-sofia.bg
81.161.240.11	A+PTR	enterprise.tu-sofia.bg
81.161.240.12	A+PTR	alpha.tu-sofia.bg
81.161.240.13	A+PTR	ipkvm.tu-sofia.bg
81.161.240.14	A	oldweb.tu-sofia.bg
81.161.240.15	A+PTR	student.tu-sofia.bg
81.161.240.16	A	cios.tu-sofia.bg
81.161.240.17	A+PTR	bgtus6.tu-sofia.bg
81.161.240.18	A+PTR	observer.tu-sofia.bg
81.161.240.19	A	mantis.tu-sofia.bg
81.161.240.20	A+PTR	ns2.tu-sofia.bg
81.161.240.21	A+PTR	proxy.tu-sofia.bg
81.161.240.22	A	cir2108g-2.tu-sofia.bg
81.161.240.23	A	cir2112-priem.tu-sofia.bg
81.161.240.24	A+PTR	mgate.tu-sofia.bg
81.161.240.25	A	fktt-old.tu-sofia.bg
81.161.240.26	A+PTR	mgate2.tu-sofia.bg
81.161.240.26	A	wg-hotspot.tu-sofia.bg
81.161.240.27	A+PTR	mgate1.tu-sofia.bg
81.161.240.27	A	wg-server.tu-sofia.bg
81.161.240.29	A+PTR	dlserver.tu-sofia.bg
81.161.240.30	A+PTR	labsserver4132.tu-sofia.bg
81.161.240.31	A+PTR	cir2112-6.tu-sofia.bg
81.161.240.32	A+PTR	cir2112-5.tu-sofia.bg
81.161.240.33	A	cir-printer.tu-sofia.bg
81.161.240.34	A	cirsap.tu-sofia.bg
81.161.240.34	A	mainnas.tu-sofia.bg
81.161.240.35	A+PTR	monitor.tu-sofia.bg
81.161.240.36	A	cir2112-2.tu-sofia.bg
81.161.240.37	A+PTR	cir2112-3.tu-sofia.bg
81.161.240.37	A	cms-sitesupport.com
81.161.240.37	A	bgsnookerreferees.com
81.161.240.38	A	cir2112-4.tu-sofia.bg
81.161.240.39	A	cir2112-7.tu-sofia.bg
81.161.240.41	A	cir2110-2.tu-sofia.bg
81.161.240.42	A	cir2103b.tu-sofia.bg
81.161.240.43	A+PTR	cir2108g-1.tu-sofia.bg
81.161.240.44	A+PTR	cir2110.tu-sofia.bg
81.161.240.44	A	cir2103-1.tu-sofia.bg
81.161.240.45	A	cir2108v.tu-sofia.bg
81.161.240.46	A	cir2110-1.tu-sofia.bg
81.161.240.47	A	cir2106-1.tu-sofia.bg
81.161.240.49	A+PTR	cir2106-3.tu-sofia.bg
81.161.240.50	A+PTR	cir2108-1.tu-sofia.bg
81.161.240.51	A	cir2108-2.tu-sofia.bg
81.161.240.52	A+PTR	cir2114.tu-sofia.bg
81.161.240.52	A	cir2103-2.tu-sofia.bg
81.161.240.53	A+PTR	servernec.tu-sofia.bg
81.161.240.54	A	cir2106-4.tu-sofia.bg
81.161.240.55	A+PTR	cir2112-8.tu-sofia.bg
81.161.240.56	A+PTR	webcast.tu-sofia.bg
81.161.240.58	A	nas.tu-sofia.bg
81.161.240.59	A	q-cir-server.tu-sofia.bg
81.161.240.73	A+PTR	kpnet.tu-sofia.bg
81.161.240.74	A	ltu.tu-sofia.bg
81.161.240.129	A	tusfw.tu-sofia.bg
81.161.240.130	A	tusgate.tu-sofia.bg
81.161.240.229	A	gate2-to-1.tu-sofia.bg
81.161.240.230	A	gate1-to-2.tu-sofia.bg
81.161.240.233	A	gate2-to-4.tu-sofia.bg
81.161.240.234	A	gate4-to-2.tu-sofia.bg
81.161.240.237	A	tu-hctp.tu-sofia.bg
81.161.240.238	A	hctp-tu.tu-sofia.bg
81.161.240.241	A	tusgate-to-gw-sw.tu-sofia.bg
81.161.240.242	A	gw-sw-to-tusgate.tu-sofia.bg
81.161.240.245	A	gate2-to-bic.tu-sofia.bg
81.161.240.246	A	bic-to-gate2.tu-sofia.bg
81.161.240.249	A	gate4-to-10.tu-sofia.bg
81.161.240.250	A	gate10-to-4.tu-sofia.bg
81.161.240.253	A	c4500-c4000.tu-sofia.bg
81.161.240.254	A	c4000-c4500.tu-sofia.bg