Robtex

Up: 199.4.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.4.16.0/22
Down right: 199.4.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.4.18.2	A+PTR	nausers.mccann.com
199.4.18.131	A+PTR	mis2.mccann.com
199.4.18.140	A	ftp.mccannsf.com
199.4.18.170	A+PTR	studio6hundred.com
199.4.18.170	A+PTR	studio6hundred.net
199.4.18.170	PTR	www.studio6hundred.com
199.4.18.185	A+PTR	kikk-heritage.com
199.4.18.185	PTR	simcity-labm.com
199.4.18.185	A	dockerstransfer.com
199.4.18.200	A	namail2.mccann.com
199.4.18.200	A	mrmsanfrancisco.com
199.4.20.2	A	altusers.mccann.com
199.4.20.30	A+PTR	namail1.mccann.com
199.4.20.41	A	groupassetportal.com
199.4.20.118	A	mail.zentropypartners.com
199.4.20.125	A	video.zentropypartners.com
199.4.20.130	A+PTR	nawebmail.mccann.com
199.4.20.130	A	nawebmail1.mccann.com
199.4.20.133	A+PTR	navpn.mccann.com
199.4.20.146	A	stageny.mrmworldwide.com
199.4.20.150	A+PTR	dns1-auth.mccann.com
199.4.20.191	A	intel.mrmworldwide.com
199.4.21.15	A+PTR	itl.gmfleet-reskin.mrmworldwide.com
199.4.21.15	PTR	itl02.gmmobility.mrmworldwide.com
199.4.21.15	PTR	itl.corvette.reveal.mrmworldwide.com
199.4.23.59	A	unilevericc2008.com
199.4.23.137	A	sunseekerdistributortoolbox.com
199.4.23.145	A	mech-i.co.uk
199.4.23.145	A	mail.mech-i.co.uk
199.4.23.149	PTR	ww-gate04.ipgnotes.com
199.4.23.180	A	survey.globalopinion.net
199.4.23.198	PTR	ww-gate03.ipgnotes.com
199.4.23.199	PTR	ww-gate05.ipgnotes.com
199.4.23.232	A	prudentialglt2009.com
199.4.23.240	PTR	futuressport.cz
199.4.23.240	PTR	www.futuressport.cz
199.4.23.240	A	futuressport.com.au
199.4.23.248	A	admin-loweportal.com
199.4.23.251	A+PTR	ldnwww01.relay.interpublic.com
199.4.23.253	PTR	ldnmgw02.interpublic.com
199.4.23.254	PTR	ldnmgw01.interpublic.com