Robtex

Up: 193.128.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 193.128.72.0/23
Down right: 193.128.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.128.72.84	A	news.csr.com
193.128.72.85	A	ftp.csr.com
193.128.72.85	A	webserver.csr.com
193.128.72.142	A	pipex-gw.npbs.co.uk
193.128.72.156	A	tillingham.eu
193.128.72.163	PTR	mailhost.univareurope.com
193.128.72.163	A	mailhost.univar.co.uk
193.128.72.163	A	mailhost.univarbenelux.com
193.128.72.212	A	lonmswv5.martinwardanderson.com
193.128.72.212	A	mailhost.mwa.co.uk
193.128.74.50	A	temp.cdr-ltd.com
193.128.74.82	PTR	proxy.dfid.gov.uk
193.128.74.99	PTR	smtp.herbertsmith.com
193.128.74.233	PTR	sbsserver.sovereigntradefinance.com
193.128.75.21	A	mail.investis.com
193.128.75.98	PTR	mailhost.ikon-gallery.co.uk
193.128.75.202	A	vcukwctest.verifone.com
193.128.75.202	A	auctiontendering.com
193.128.75.246	PTR	telectuk01-gw.customer.uk.uu.net