Robtex

Up: 5.159.112.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 5.159.120.0/22
Down right: 5.159.124.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.159.120.48	A+PTR	radius.securuscomms.co.uk
5.159.120.83	A+PTR	radius1.securuscomms.co.uk
5.159.120.94	A+PTR	radius2.securuscomms.co.uk
5.159.120.136	A	ns2.securuscomms.co.uk
5.159.120.138	A	ns3.securuscomms.co.uk
5.159.120.170	PTR	mailgate.algram.com
5.159.121.3	A+PTR	port-3-121.securuscomms.co.uk
5.159.121.3	A	nmileadns2.nexusmgmt.com
5.159.121.20	A+PTR	port-20-121.securuscomms.co.uk
5.159.121.21	A	mx2.enablesoffice.com
5.159.121.40	A+PTR	port-40-121.securuscomms.co.uk
5.159.121.40	A	ns2.enablesit.com
5.159.121.41	A+PTR	port-41-121.securuscomms.co.uk
5.159.121.41	A	ns4.enablesit.com
5.159.121.42	PTR	port-42-121.securuscomms.co.uk
5.159.121.83	A	longshot.com
5.159.121.103	A+PTR	port-103-121.securuscomms.co.uk
5.159.121.105	A	mail.tauntonleisure.com
5.159.121.107	A+PTR	port-107-121.securuscomms.co.uk
5.159.121.145	A	mail.winetreasury.com
5.159.121.184	A+PTR	mail.goedhuis.com
5.159.121.184	A	mail.privatereservesltd.com
5.159.122.18	A+PTR	mail.ymcaderbyshire.org.uk
5.159.122.118	A+PTR	remote.steelandshamash.co.uk
5.159.122.118	A	mail.steelandshamash.co.uk
5.159.122.138	A	rdshosted.email
5.159.122.162	A+PTR	port-162-122.securuscomms.co.uk
5.159.122.162	A	mail.cobal.co.uk
5.159.122.162	A	mail2.cobal.co.uk
5.159.122.170	PTR	mailgate.algram.com
5.159.123.21	A+PTR	port-21-123.securuscomms.co.uk
5.159.123.95	A	mail.hsmithplc.com
5.159.123.95	A	mail2.hsmithplc.com
5.159.123.96	A+PTR	mail.ruralactionderbyshire.org.uk
5.159.123.96	A	mx1.wheelstowork.org
5.159.123.198	A	smtp.imex-group.com
5.159.124.1	A	urbanretreat.co.uk
5.159.124.2	PTR	port-2-124.securuscomms.co.uk
5.159.124.2	A	britishbeautyexperts.com
5.159.124.2	A	mistermascara.com
5.159.124.3	PTR	port-3-124.securuscomms.co.uk
5.159.124.6	PTR	port-6-124.securuscomms.co.uk
5.159.124.44	A+PTR	mail.ymcabirmingham.org.uk
5.159.124.44	A	mail.birminghamymca.co.uk
5.159.124.175	A+PTR	port-175-124.securuscomms.co.uk
5.159.124.175	A	www.meregrn.bham.sch.uk
5.159.124.176	A+PTR	port-176-124.securuscomms.co.uk
5.159.124.176	A	www.hillwest.bham.sch.uk
5.159.124.177	A+PTR	port-177-124.securuscomms.co.uk
5.159.124.177	A	www.slade.bham.sch.uk
5.159.124.178	PTR	port-178-124.securuscomms.co.uk
5.159.124.179	PTR	port-179-124.securuscomms.co.uk
5.159.124.192	A+PTR	port-192-124.securuscomms.co.uk
5.159.124.196	A+PTR	port-196-124.securuscomms.co.uk
5.159.125.9	PTR	port-9-125.securuscomms.co.uk
5.159.125.9	A	a17-112-144-50.peasoup.net
5.159.125.9	A	bos-mail2.domains.peasoup.net
5.159.125.10	PTR	port-10-125.securuscomms.co.uk
5.159.125.49	PTR	port-49-125.securuscomms.co.uk
5.159.125.49	A	ns1.ashleyidesign.com
5.159.125.49	A	mail.aerochick.com
5.159.125.52	PTR	port-52-125.securuscomms.co.uk
5.159.125.58	PTR	ns1.lloydhosting.co.uk
5.159.125.58	A	mail.swdt.org.uk
5.159.125.58	A	milenamichalski.com
5.159.125.59	PTR	ns2.lloydhosting.co.uk
5.159.125.61	PTR	port-61-125.securuscomms.co.uk
5.159.125.68	A+PTR	port-68-125.securuscomms.co.uk
5.159.125.68	A	mx1.jepson-online.com
5.159.125.68	A	mx0.jepson-online.com
5.159.125.75	PTR	port-75-125.securuscomms.co.uk
5.159.125.75	A	www.watfordboys.org
5.159.125.75	A	olivetreecookeryschool.co.uk
5.159.125.76	PTR	port-76-125.securuscomms.co.uk
5.159.125.77	PTR	port-77-125.securuscomms.co.uk
5.159.125.87	A+PTR	port-87-125.securuscomms.co.uk
5.159.125.87	A	jepson-web-api.com
5.159.125.101	A+PTR	port-101-125.securuscomms.co.uk
5.159.125.101	A	mcie-quark.com
5.159.125.111	A+PTR	port-111-125.securuscomms.co.uk
5.159.125.111	A	www.westminsterwire.com
5.159.125.131	A	mail.skillsactive.com
5.159.125.194	A+PTR	port-194-125.securuscomms.co.uk
5.159.125.194	A	mail.yhg.co.uk
5.159.125.211	A+PTR	port-211-125.securuscomms.co.uk
5.159.125.225	A+PTR	mail.alamoeur.com
5.159.125.225	A	mail.mcconnel.com
5.159.125.225	A	mail.multidrivetractors.co.uk
5.159.125.226	PTR	port-226-125.securuscomms.co.uk
5.159.125.230	PTR	port-230-125.securuscomms.co.uk
5.159.125.235	A+PTR	mail2.alamoeur.com
5.159.125.235	A	mail2.multidrivetractors.co.uk
5.159.125.235	A	mail4.alamoeur.com
5.159.125.237	PTR	port-237-125.securuscomms.co.uk
5.159.125.237	A	mx10.alamoeur.com
5.159.127.229	A+PTR	port-229-127.securuscomms.co.uk
5.159.127.229	A	mystreet.org
5.159.127.229	A	www.mystreet.org