Robtex

Up: 212.30.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.30.12.0/25
Down right: 212.30.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.30.12.35	A+PTR	mail.cwguernsey.com
212.30.12.36	A	webmail.cwguernsey.com
212.30.12.93	A	owa.certustrust.com
212.30.12.94	A	mailserver.certustrust.com
212.30.12.101	PTR	digimapcwnet.digimap.gg
212.30.12.101	A	www.rnli.org.gg
212.30.12.101	A	checkoutci.com
212.30.12.105	A	dpr.gov.gg
212.30.12.110	A	digimap-ns.surcombe.com
212.30.12.132	A+PTR	mx1.assured.uk.com
212.30.12.134	PTR	mail2.assured.uk.com
212.30.12.134	A	mail2.lavillettehotel.co.uk
212.30.12.134	A	mail2.r1construction.co.uk
212.30.12.135	A+PTR	mx2.assured.uk.com
212.30.12.138	A+PTR	sf01.assured.uk.com
212.30.12.138	A	sf01.louvrefund.com
212.30.12.138	A	sf01.jupiter.gg
212.30.12.141	PTR	mail.assured.uk.com
212.30.12.141	A	mail.sarnialeadworks.com
212.30.12.141	A	mail.wpl.gg
212.30.12.164	A	electriczebra.com
212.30.12.165	A	healthspan.fr
212.30.12.170	A	www.vetvits.com
212.30.12.170	A	weight-away.com
212.30.12.170	A	healthspanleisure.com
212.30.12.171	A	mail.vetvits.com
212.30.12.171	A	mail.healthspandiscovery.com
212.30.12.175	A	healthspandiscovery.com
212.30.12.177	A	healthspannurture.com
212.30.12.177	A	nurturereplenish.com
212.30.12.186	A+PTR	rev186.email.hsgrp.co.uk
212.30.12.190	A	mx.email.healthspan.co.uk
212.30.12.190	A	mx.email2.hsgrp.co.uk
212.30.12.190	A	mx.hsgrp.co.uk
212.30.12.198	PTR	haggisadventures.com
212.30.12.198	PTR	highlandexploretours.com
212.30.12.198	PTR	shamrockeradventures.com