Robtex

Up: 109.123.198.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 109.123.198.0/25
Down right: 109.123.198.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
109.123.198.0	PTR	net-host-109.123.198.cs.bigbluone.com
109.123.198.4	A	match2redirect.com
109.123.198.16	PTR	host-109-123-198-016.cs.bigblueone.com
109.123.198.16	A	app.gim.cz
109.123.198.16	A	*.gim.cz
109.123.198.19	A	mx.channelgreen.org
109.123.198.24	PTR	host-109-123-198-024.cs.bigblueone.com
109.123.198.24	A	www.tendermarket.cz
109.123.198.24	A	tendermarket.cz
109.123.198.66	PTR	host-109-123-198-066.cs.bigblueone.com
109.123.198.66	A	bigedison.cz
109.123.198.86	PTR	host-109-123-198-086.cs.bigblueone.com
109.123.198.86	A	cykloasist.cz
109.123.198.86	A	www.uamk-cr.cz
109.123.198.117	A	server.planets.cz
109.123.198.134	PTR	host-109-123-198-134.cs.bigblueone.com
109.123.198.134	A	triatlony.com
109.123.198.134	A	bezkuj.com
109.123.198.135	A+PTR	server04.green24.cz
109.123.198.135	A	iprospectplanning.cz
109.123.198.139	PTR	host-109-123-198-139.cs.bigblueone.com
109.123.198.139	A	yiyiartoftranslation.org
109.123.198.149	PTR	host-109-123-198-149.cs.bigblueone.com
109.123.198.149	A	ns2.ns4.root.ns5.ns1.fishum.com
109.123.198.149	A	5micngiitdeipnn348pt21vmfg36bm70.easyexpats.com
109.123.198.171	PTR	host-109-123-198-171.cs.bigblueone.com
109.123.198.171	A	casa1.ppdx.net
109.123.198.173	PTR	host-109-123-198-173.cs.bigblueone.com
109.123.198.173	A	polyfazer.com
109.123.198.173	A	polyfazer.cz
109.123.198.174	A	ociris.cz
109.123.198.174	A	ociris.ch
109.123.198.187	PTR	host-109-123-198-187.cs.bigblueone.com
109.123.198.187	A	detail.cz
109.123.198.199	A+PTR	exchange.defend.eu
109.123.198.199	A	exchange.defendinsurance.eu
109.123.198.201	A	match.redirecthere.net
109.123.198.255	PTR	bcast-109-123-198.cs.bigblueone.com