Robtex

Up: 79.98.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 79.98.72.0/25
Down right: 79.98.72.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
79.98.72.1	PTR	ns1.sys-data.com
79.98.72.1	PTR	www.sys-data.com
79.98.72.1	PTR	a.ns.brouzdej.net
79.98.72.2	A+PTR	dns-cache2.sys-data.com
79.98.72.2	A+PTR	ns2.sys-data.com
79.98.72.2	A+PTR	b.ns.brouzdej.net
79.98.72.3	PTR	smokeping.brouzdej.net
79.98.72.4	A+PTR	sip.sys-data.com
79.98.72.5	PTR	smtp.brouzdej.net
79.98.72.5	A	mail.epd-pa.cz
79.98.72.5	A	mail.energokd.cz
79.98.72.6	A	79-98-72-6.sys-data.com
79.98.72.7	A+PTR	info.sys-data.com
79.98.72.7	A	system.sys-data.com
79.98.72.11	A+PTR	smtp.brouzdej.net
79.98.72.11	A	smtp.sys-data.com
79.98.72.11	A	smtp.dslone.cz
79.98.72.14	PTR	radius1.sys-data.com
79.98.72.14	A	smtp.brouzdej.com
79.98.72.15	A	*.sdc.brouzdej.net
79.98.72.15	A	skola-cernosice.sdc.brouzdej.net
79.98.72.15	A	www.svetloplus.cz
79.98.72.17	A	mail.sysdatacom.cz
79.98.72.17	A	posta.bozejovice.cz
79.98.72.19	A	beth-or.cz
79.98.72.20	A	mail2.popron.cz
79.98.72.21	PTR	data.popron.cz
79.98.72.21	A	popronpartner.cz
79.98.72.21	A	popronmedia.com
79.98.72.25	A+PTR	nas3.vlaskovi.cz
79.98.72.26	A+PTR	katalog.haspa.cz
79.98.72.26	A	mail.kuticka.cz
79.98.72.26	A	*.haspa.cz
79.98.72.27	A+PTR	dns-cache1.sys-data.com
79.98.72.33	A	79-98-72-33.sys-data.com
79.98.72.34	A	79-98-72-34.sys-data.com
79.98.72.36	A+PTR	79-98-72-36.sys-data.com
79.98.72.37	A+PTR	79-98-72-37.sys-data.com
79.98.72.37	A	is.sys-data.com
79.98.72.38	A+PTR	79-98-72-38.sys-data.com
79.98.72.42	A+PTR	79-98-72-42.sys-data.com
79.98.72.44	A	79-98-72-44.sys-data.com
79.98.72.54	PTR	gw-ttc.dslone.cz
79.98.72.57	PTR	79-98-72-57.sys-data.com
79.98.72.61	PTR	bgp-peering-sec-ttc.sys-data.com
79.98.72.73	PTR	79-98-72-73.sys-data.com
79.98.72.83	PTR	79-98-72-83.sys-data.com
79.98.72.86	PTR	79-98-72-86.sys-data.com
79.98.72.93	A+PTR	smtp.vlaskovi.cz
79.98.72.93	A	*.vlaskovi.cz
79.98.72.93	A	vlaskovi.cz
79.98.72.116	PTR	79-98-72-116.sys-data.com
79.98.72.116	A	79.98.72.116.hostliner.cz
79.98.72.116	A	www.zastavarnypv.cz
79.98.72.117	PTR	79-98-72-117.sys-data.com
79.98.72.117	A	fotbalon.cz
79.98.72.123	PTR	79-98-72-123.sys-data.com
79.98.72.123	A	bufashion.cz
79.98.72.123	A	ganoczy.com
79.98.72.126	PTR	79-98-72-126.sys-data.com
79.98.72.130	A	79-98-72-130.sys-data.com
79.98.72.131	A	79-98-72-131.sys-data.com
79.98.72.132	PTR	79-98-72-132.sys-data.com
79.98.72.135	A	79-98-72-135.sys-data.com
79.98.72.145	A	79-98-72-145.sys-data.com
79.98.72.146	PTR	79-98-72-146.sys-data.com
79.98.72.147	PTR	79-98-72-147.sys-data.com
79.98.72.152	PTR	79-98-72-152.sys-data.com
79.98.72.154	A	79-98-72-154.sys-data.com
79.98.72.155	A	79-98-72-155.sys-data.com
79.98.72.156	PTR	79-98-72-156.dynamic-nat-ip.sys-data.com
79.98.72.156	A	79-98-72-156.sys-data.com
79.98.72.159	PTR	79-98-72-159.sys-data.com
79.98.72.160	A+PTR	79-98-72-160.sys-data.com
79.98.72.161	PTR	79-98-72-161.dynamic-nat-ip.sys-data.com
79.98.72.161	A	79-98-72-161.sys-data.com
79.98.72.162	A	79-98-72-162.sys-data.com
79.98.72.163	PTR	79-98-72-163.sys-data.com
79.98.72.170	PTR	79-98-72-170.dynamic-nat-ip.sys-data.com
79.98.72.171	A+PTR	79-98-72-171.sys-data.com
79.98.72.175	PTR	79-98-72-175.sys-data.com
79.98.72.176	PTR	79-98-72-176.sys-data.com
79.98.72.177	A+PTR	79-98-72-177.sys-data.com
79.98.72.179	A	79-98-72-179.sys-data.com
79.98.72.184	A+PTR	79-98-72-184.sys-data.com
79.98.72.191	PTR	79-98-72-191.dynamic-nat-ip.sys-data.com
79.98.72.191	A	79-98-72-191.sys-data.com
79.98.72.192	PTR	79-98-72-192.sys-data.com
79.98.72.193	A+PTR	79-98-72-193.sys-data.com
79.98.72.194	A+PTR	79-98-72-194.sys-data.com
79.98.72.197	A	79-98-72-197.sys-data.com
79.98.72.198	A	79-98-72-198.sys-data.com
79.98.72.204	A	79-98-72-204.sys-data.com
79.98.72.205	A	79-98-72-205.sys-data.com
79.98.72.208	PTR	79-98-72-208.sys-data.com
79.98.72.216	A+PTR	79-98-72-216.sys-data.com
79.98.72.217	A	79-98-72-217.sys-data.com
79.98.72.220	PTR	79-98-72-220.dynamic-nat-ip.sys-data.com
79.98.72.220	A	79-98-72-220.sys-data.com
79.98.72.222	A+PTR	79-98-72-222.sys-data.com
79.98.72.223	PTR	79-98-72-223.dynamic-nat-ip.sys-data.com
79.98.72.223	A	79-98-72-223.sys-data.com
79.98.72.225	A	79-98-72-225.sys-data.com
79.98.72.227	A	79-98-72-227.sys-data.com
79.98.72.228	PTR	79-98-72-228.sys-data.com
79.98.72.229	A	79-98-72-229.sys-data.com
79.98.72.232	A	79-98-72-232.sys-data.com
79.98.72.234	A	79-98-72-234.sys-data.com
79.98.72.235	A+PTR	79-98-72-235.sys-data.com
79.98.72.236	PTR	79-98-72-236.sys-data.com
79.98.72.237	PTR	79-98-72-237.dynamic-nat-ip.sys-data.com
79.98.72.237	A	79-98-72-237.sys-data.com
79.98.72.241	PTR	79-98-72-241.sys-data.com
79.98.72.245	A+PTR	79-98-72-245.sys-data.com
79.98.72.253	A+PTR	79-98-72-253.sys-data.com
79.98.72.255	PTR	79-98-72-255.dynamic-nat-ip.sys-data.com