Robtex

Up: 212.22.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 212.22.16.0/21
Down right: 212.22.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.22.16.234	A	smtpmail.stbarnabas-hospice.org.uk
212.22.16.234	A	smtpmail.stbarnabashospice.org.uk
212.22.16.234	A	mail.stbh.org.uk
212.22.17.98	PTR	habmail1.habinteg.org.uk
212.22.17.98	PTR	it.habinteg.org.uk
212.22.18.154	A	remote.stkittsnevisregistry.net
212.22.18.154	A	mail.stkittsnevisregistry.net
212.22.19.70	PTR	smtpmail.mithn.org.uk
212.22.19.82	PTR	mail.stanley-dean.co.uk
212.22.20.166	A+PTR	list.uhy.com
212.22.20.166	PTR	uhyuklist.list.uhy.com
212.22.21.21	PTR	smtp.rayner-essex.co.uk
212.22.21.98	PTR	haringey.mih.org.uk
212.22.24.70	PTR	remote1.avantepartnership.org.uk
212.22.24.70	PTR	remote.stepaheadsupport.org.uk