Robtex

Up: 143.252.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 143.252.4.0/23
Down right: 143.252.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
143.252.4.69	PTR	rs.elision.com
143.252.4.129	PTR	mail20.globalmediaxchange.com
143.252.6.76	A	circsrv.newsint.co.uk
143.252.6.76	A	newsight.newsint.co.uk
143.252.6.93	A	sundaytimesbusinessadsdirect.co.uk
143.252.6.93	A	timesvalentines.com
143.252.6.93	A	timesannouncements.com
143.252.7.35	PTR	mail10.globalmediaxchange.com
143.252.7.36	A	carat-medianet.com
143.252.7.36	A	arlafoodsmedia.com
143.252.7.45	A	mail1.globalmediaxchange.com
143.252.7.96	A	mail2.globalmediaxchange.com
143.252.7.98	PTR	mail20.globalmediaxchange.com