Robtex

Up: 213.210.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.210.21.0/25
Down right: 213.210.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.210.21.28	A	backup.bill-lewington.com
213.210.21.74	A+PTR	www.crane.co.uk
213.210.21.74	A	joesparks.co.uk
213.210.21.74	A	bier.co.uk
213.210.21.75	PTR	mail.crane.co.uk
213.210.21.98	PTR	rev98-21.210.213.no-dns.inweb.co.uk
213.210.21.211	PTR	store.metrodata.co.uk
213.210.21.243	PTR	masala.yospace.com