Robtex

Up: 5.2.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 5.2.18.0/24
Down right: 5.2.19.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.2.18.2	PTR	client1005.boxcolo.co.uk
5.2.18.3	PTR	client1005.boxcolo.co.uk
5.2.18.4	PTR	client1075.boxcolo.co.uk
5.2.18.5	PTR	client1075.boxcolo.co.uk
5.2.18.6	PTR	client1075.boxcolo.co.uk
5.2.18.6	A	dailyexpresso.co.uk
5.2.18.7	PTR	client1075.boxcolo.co.uk
5.2.18.7	A	port-7.boxcolo.co.uk
5.2.18.8	PTR	client1075.boxcolo.co.uk
5.2.18.9	PTR	client1075.boxcolo.co.uk
5.2.18.10	A+PTR	mail.app3.co.uk
5.2.18.10	A	dns1.boxcolo.co.uk
5.2.18.11	A+PTR	exchange.opcsdesign.net
5.2.18.11	A	mail.opcsdesign.com
5.2.18.12	PTR	client1015.boxcolo.co.uk
5.2.18.12	A	mailhost.opcsdesign.net
5.2.18.12	A	stevehumby.com
5.2.18.13	A+PTR	gw.opcsdesign.net
5.2.18.13	A	gw.stevehumby.com
5.2.18.14	PTR	client1015.boxcolo.co.uk
5.2.18.15	A+PTR	zebra.softcraft.co.uk
5.2.18.16	A+PTR	dc2.yvts.co.uk
5.2.18.16	A	tristanscott.co.uk
5.2.18.16	A	yvts.co.uk
5.2.18.17	PTR	client1073.boxcolo.co.uk
5.2.18.18	PTR	client1073.boxcolo.co.uk
5.2.18.19	PTR	client1073.boxcolo.co.uk
5.2.18.20	PTR	client1073.boxcolo.co.uk
5.2.18.21	PTR	client1073.boxcolo.co.uk
5.2.18.22	PTR	client1012.boxcolo.co.uk
5.2.18.23	PTR	client1012.boxcolo.co.uk
5.2.18.24	PTR	client1012.boxcolo.co.uk
5.2.18.25	PTR	client1012.boxcolo.co.uk
5.2.18.26	PTR	client1012.boxcolo.co.uk
5.2.18.27	PTR	client1012.boxcolo.co.uk
5.2.18.28	PTR	client1012.boxcolo.co.uk
5.2.18.29	PTR	client1012.boxcolo.co.uk
5.2.18.30	PTR	client1075.boxcolo.co.uk
5.2.18.34	A+PTR	mailer.mad4cars.com
5.2.18.34	A	mad4cars.com
5.2.18.34	A	leggysal.com
5.2.18.35	PTR	client1011.boxcolo.co.uk
5.2.18.36	PTR	client1009.boxcolo.co.uk
5.2.18.36	A	claretts.com
5.2.18.36	A	eastlakedesigns.com
5.2.18.37	PTR	client1009.boxcolo.co.uk
5.2.18.37	A	mosaicinsurancebrokers.com
5.2.18.37	A	mosaicinsuranceservices.com
5.2.18.38	PTR	client1009.boxcolo.co.uk
5.2.18.38	A	mosaicinsurancebrokers.com
5.2.18.38	A	mosaicinsurancebrokers.net
5.2.18.39	PTR	client1009.boxcolo.co.uk
5.2.18.39	A	mosaicinsuranceunderwriting.com
5.2.18.39	A	mosaicinsuranceunderwriting.net
5.2.18.40	PTR	client1009.boxcolo.co.uk
5.2.18.41	PTR	client1009.boxcolo.co.uk
5.2.18.42	PTR	client1009.boxcolo.co.uk
5.2.18.42	A	millenniumselect.co.uk
5.2.18.43	PTR	client1009.boxcolo.co.uk
5.2.18.43	A	millenniuminsurance.co.uk
5.2.18.43	A	mail.millenniuminsurance.co.uk
5.2.18.44	A+PTR	gorilla.sampsa.com
5.2.18.44	A	silverback.sampsa.com
5.2.18.44	A	chimpy.sampsa.com
5.2.18.45	A+PTR	b4bbs.sampsa.com
5.2.18.46	PTR	gorvax.sampsa.com
5.2.18.47	PTR	pyffle.sampsa.com
5.2.18.48	PTR	chimpy.sampsa.com
5.2.18.49	PTR	client1012.boxcolo.co.uk
5.2.18.50	PTR	client1012.boxcolo.co.uk
5.2.18.51	PTR	client1012.boxcolo.co.uk
5.2.18.52	PTR	client1012.boxcolo.co.uk
5.2.18.53	PTR	client1012.boxcolo.co.uk
5.2.18.54	A+PTR	router.sampsa.com
5.2.18.56	PTR	client1090.boxcolo.co.uk
5.2.18.57	PTR	client1090.boxcolo.co.uk
5.2.18.58	PTR	client1090.boxcolo.co.uk
5.2.18.59	PTR	client1090.boxcolo.co.uk
5.2.18.60	PTR	client1090.boxcolo.co.uk
5.2.18.66	PTR	rmsdatabase.theonsitegroup.co.uk
5.2.18.90	PTR	mailscanner.redit.co.uk
5.2.18.90	A	smtp.redit.co.uk
5.2.18.90	A	smtp.datacadet.co.uk
5.2.18.97	PTR	redit.co.uk
5.2.18.97	A	spare-175-042-163.redithosting.co.uk
5.2.18.97	A	spare-175-035-002.redithosting.co.uk
5.2.18.98	A	kidson-petlem.com
5.2.18.99	A+PTR	name0.redithosting.co.uk
5.2.18.99	A	ns0.redithosting.co.uk
5.2.18.100	A+PTR	mail0.redithosting.co.uk
5.2.18.100	A	mail.thesapper.co.uk
5.2.18.100	A	mail.redit.co.uk
5.2.18.102	A+PTR	mysql0.redithosting.co.uk
5.2.18.104	PTR	web1.redithosting.co.uk
5.2.18.104	A	datacadet.co.uk
5.2.18.104	A	wickhamwalkies.com
5.2.18.108	PTR	mail1.redithosting.co.uk
5.2.18.108	A	mail.snbc.org.uk
5.2.18.108	A	mail.ashbyssouthsea.com
5.2.18.122	A+PTR	camswifi.serverhouse.co.uk
5.2.18.126	PTR	shukfhmcust2445.serverhouse.co.uk
5.2.18.139	A+PTR	smtp01.benefex.co.uk
5.2.18.145	A	mandschoices.com
5.2.18.145	A	therewardhub.com
5.2.18.145	A	www.therewardhub.com
5.2.18.168	A+PTR	demo.e360.imshealth.com
5.2.18.169	A+PTR	fhmsweb1003.e360.imshealth.com
5.2.18.170	A+PTR	fhmsweb1004.e360.imshealth.com
5.2.18.180	A+PTR	web1.dmz.cprd.hosted.dataline.co.uk
5.2.18.181	A+PTR	web2.dmz.cprd.hosted.dataline.co.uk
5.2.18.182	PTR	www.dmz.cprd.hosted.dataline.co.uk
5.2.18.183	A+PTR	web4.dmz.cprd.hosted.dataline.co.uk
5.2.18.184	A+PTR	web5.dmz.cprd.hosted.dataline.co.uk
5.2.18.185	A+PTR	web6.dmz.cprd.hosted.dataline.co.uk
5.2.18.186	A+PTR	uat.dmz.cprd.hosted.dataline.co.uk
5.2.18.194	A	thetooladvisor.net
5.2.18.194	A	thetooladvisor.com
5.2.18.194	A	havi-total.com
5.2.18.213	A+PTR	www.e360.imshealth.com
5.2.18.214	A+PTR	fhmsapp1001.e360.imshealth.com
5.2.18.241	PTR	gw.ukispweb.com
5.2.18.242	PTR	101.ukispweb.com
5.2.18.242	A	leased-line.co.uk
5.2.18.242	A	colocation.co.uk
5.2.18.243	PTR	ns1.ukispweb.net
5.2.18.244	PTR	101.ukispweb.com
5.2.18.245	PTR	101.ukispweb.com
5.2.18.246	PTR	101.ukispweb.com
5.2.18.247	PTR	101.ukispweb.com
5.2.18.248	PTR	101.ukispweb.com
5.2.18.249	PTR	101.ukispweb.com
5.2.18.250	PTR	101.ukispweb.com
5.2.18.251	PTR	101.ukispweb.com
5.2.18.251	A	ns2.seveninternet.co.uk
5.2.18.253	PTR	101.ukispweb.com
5.2.18.254	A+PTR	cleanmail01.serverhouse.co.uk
5.2.18.254	A	mail.dcigroup.uk.com
5.2.19.6	A+PTR	remote.atjones.net
5.2.19.14	A+PTR	cust1044.green-colo.co.uk
5.2.19.14	A	mail.first-chapter.co.uk
5.2.19.26	A	lesselfassessment.com
5.2.19.43	A	mail.ultracomms.com
5.2.19.62	A+PTR	gspfareham.sebsonline.net
5.2.19.62	A	adsl-mail.gspfareham.co.uk
5.2.19.74	A+PTR	www.fitlads.net
5.2.19.74	A	www.fitlads.co.uk
5.2.19.74	A	www.fitlads.com
5.2.19.106	A+PTR	mail.coachinabox.biz
5.2.19.106	A	mx2.coachinabox.biz
5.2.19.121	A	www.gosport.gov.uk
5.2.19.121	A	playstation.gosport.gov.uk
5.2.19.131	A+PTR	mail.hostedcompanies.co.uk
5.2.19.134	A+PTR	antispam.hostedcompanies.co.uk
5.2.19.139	A+PTR	mailenable.hostedcompanies.co.uk
5.2.19.148	A	citycentrerecruitment.co.uk
5.2.19.148	A	www.citycentrerecruitment.co.uk
5.2.19.161	A	www.tekrekt.co.uk
5.2.19.161	A	tekrekt.co.uk
5.2.19.162	PTR	mail.datacom.uk.com
5.2.19.166	A	datacom.uk.com
5.2.19.166	A	www.datacom.uk.com
5.2.19.178	A+PTR	mail.ifsnet.co.uk
5.2.19.194	A	sales.hydesails.com
5.2.19.218	A+PTR	mail.vgf.co.uk
5.2.19.218	A	mail.ckfinancialmarkets.com
5.2.19.221	A+PTR	mailmonitor.hostedcompanies.co.uk
5.2.19.221	A	antispam.vgf.co.uk
5.2.19.221	A	antispam.datacom.uk.com
5.2.19.226	PTR	wpmail.hostedcompanies.co.uk
5.2.19.226	A	citycentre.uk.com
5.2.19.226	A	wp.hostedcompanies.co.uk
5.2.19.228	A+PTR	clientportal.ifsnet.co.uk
5.2.19.229	A	www.multitouches.co.uk
5.2.19.229	A	sourcemedia.co.uk
5.2.19.229	A	www.promultis.info
5.2.19.230	A	www.roseinbloom.co.uk
5.2.19.230	A	villalosolivosjavea.com
5.2.19.230	A	roseinbloom.co.uk
5.2.19.233	A	www.sourcetech.co.uk
5.2.19.246	A+PTR	mail.datacom.uk.com
5.2.19.251	A+PTR	mail.citycentrerecruitment.co.uk
5.2.19.252	A	campinglechti.com
5.2.19.254	A	pubwatchgroup.com