Robtex

Up: 213.205.138.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.205.139.0/25
Down right: 213.205.139.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.205.139.70	PTR	mail1.orangeict.co.uk
213.205.139.70	A	mailserver.ppioffice.co.uk
213.205.139.200	PTR	gw2.mountain.web.com
213.205.139.209	PTR	mail.irishosted.co.uk
213.205.139.209	A	mail.trinitychambers.com
213.205.139.209	A	mailgate.heermanak.co.uk
213.205.139.218	PTR	charon.irishosted.co.uk
213.205.139.218	A	a365hosted.com
213.205.139.218	A	mail.irishosted.org
213.205.139.222	A	elliotsperth.co.uk