Robtex

Up: 199.123.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.123.0.0/23
Down right: 199.123.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.123.0.11	A+PTR	mail.wyoneb.net
199.123.0.11	A	clicksunset.com
199.123.0.11	A	*.clicksunset.com
199.123.0.35	PTR	mail.plummerinsurance.com
199.123.0.71	A+PTR	mail.plummerinsurance.com
199.123.0.129	PTR	199-123-0-129.scb.ne.as15108.com
199.123.0.129	A	thekarette.com
199.123.0.129	A	bridgeportsubway.com
199.123.1.19	PTR	199-123-1-19.brptne.res.dyn.allophone.biz
199.123.1.134	PTR	199-123-1-134.brptne.res.dyn.allophone.biz
199.123.1.134	A	mkclansd.com
199.123.1.185	PTR	199-123-1-185.brptne.res.dyn.allophone.biz
199.123.1.248	PTR	199-123-1-248.brptne.res.dyn.allophone.biz
199.123.2.17	A	mail.giffordandcox.com
199.123.2.34	A	mail.pathologyservices.com
199.123.2.35	PTR	199-123-2-35.npl.ne.as15108.com
199.123.2.35	A	pspcdirect.com
199.123.2.40	A+PTR	mail.agriaffiliates.com
199.123.2.40	A+PTR	remote.agriaffiliates.com
199.123.2.75	A	1st-class.us
199.123.2.81	A	remote.imanp.com
199.123.2.96	A	mail.cloudviewhost.com
199.123.2.96	A	mail2.cloudviewhost.com
199.123.2.96	A	cloudviewhost.com
199.123.2.148	A	smtp.getkeyblog.com
199.123.2.148	A	getkeyblog.com
199.123.2.148	A	bluestonetrackpowder.com
199.123.2.163	A	remote.newtonkujathcady.com
199.123.2.176	A+PTR	199-123-2-176.npl.ne.static.allophone.net
199.123.2.176	A	1st-class.us
199.123.2.230	PTR	199-123-2-230.npl.ne.as15108.com
199.123.2.230	A	susanbphotography.com
199.123.2.248	A	www.canaanmedia.co
199.123.2.248	A	www.biblelit.com
199.123.2.248	A	www.canaanradio.com
199.123.3.13	PTR	199-123-3-13.npl.ne.as15108.com
199.123.3.114	A	remote.c4computers.net
199.123.3.233	PTR	199-123-3-233.npltne.res.dyn.allophone.biz
199.123.3.250	PTR	199-123-3-250.npltne.res.dyn.allophone.biz