Robtex

Up: 81.21.68.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.21.68.0/25
Down right: 81.21.68.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.21.68.1	PTR	fa1-0-6.cr1.donc.donhost.co.uk
81.21.68.2	PTR	fa0-0-6.cr2.donc.donhost.co.uk
81.21.68.3	A+PTR	hs4.donc.donhost.co.uk
81.21.68.4	PTR	amanda.donc.donhost.co.uk
81.21.68.5	PTR	server22.donhost.co.uk
81.21.68.11	PTR	ds4867.dedicated.turbodns.co.uk
81.21.68.12	PTR	ds4868.dedicated.turbodns.co.uk
81.21.68.13	PTR	ds4872.dedicated.turbodns.co.uk
81.21.68.15	A	mail.grazebrookpark.com
81.21.68.15	A	midlandindustrialmetals.com
81.21.68.15	A	mail.midlandindustrialmetals.com
81.21.68.17	PTR	ds9404.dedicated.turbodns.co.uk
81.21.68.18	A	nuwhats-online.co.uk
81.21.68.18	A	nuwhats-online.com
81.21.68.20	A	glasgowbulls.com
81.21.68.28	PTR	ds9404.dedicated.turbodns.co.uk
81.21.68.28	A	watco-refrigeration.co.uk
81.21.68.28	A	www.playbackhd.tv
81.21.68.45	PTR	ds5493.dedicated.turbodns.co.uk
81.21.68.46	PTR	ds5493.dedicated.turbodns.co.uk
81.21.68.56	A	amtcars.com
81.21.68.56	A	biscuitvehicleleasing.com
81.21.68.56	A	idfs.co.uk
81.21.68.57	A	altheawilson.com
81.21.68.76	PTR	ds35.dedicated.turbodns.co.uk
81.21.68.77	PTR	ns2.freewaycommerce.com
81.21.68.84	PTR	ds8748.dedicated.turbodns.co.uk
81.21.68.84	A	mail.ukplastics.co.uk
81.21.68.84	A	mail.uknoparkingsigns.co.uk
81.21.68.91	A	mail.mothercarepix.com
81.21.68.97	A	smtp.sharetobuy.com
81.21.68.102	A	unix3.hostonce.org
81.21.68.103	PTR	ds5011.dedicated.turbodns.co.uk
81.21.68.103	A	unix4.hostonce.org
81.21.68.106	A	ssl.mobal.com
81.21.68.107	A+PTR	ns1.fun-fairs.co.uk
81.21.68.108	A+PTR	ns2.fun-fairs.co.uk
81.21.68.111	PTR	ds4867.dedicated.turbodns.co.uk
81.21.68.118	A	cottage-short-breaks.com
81.21.68.119	PTR	ds4868.dedicated.turbodns.co.uk
81.21.68.131	PTR	ds4872.dedicated.turbodns.co.uk
81.21.68.155	A	cattles-glazing-beads.com
81.21.68.155	A	cattlesglazingbeads.com
81.21.68.159	PTR	ds812.dedicated.turbodns.co.uk
81.21.68.166	A	www.impulse-gaming.co.uk
81.21.68.166	A	ns1.henderson-grime.com
81.21.68.166	A	www.pjpuk.co.uk
81.21.68.169	PTR	ds4979.dedicated.turbodns.co.uk
81.21.68.171	PTR	ds4979.dedicated.turbodns.co.uk
81.21.68.174	PTR	ds4981.dedicated.turbodns.co.uk
81.21.68.175	PTR	ds4981.dedicated.turbodns.co.uk
81.21.68.180	PTR	ds4982.dedicated.turbodns.co.uk
81.21.68.181	PTR	ds4982.dedicated.turbodns.co.uk
81.21.68.197	PTR	ds163.dedicated.turbodns.co.uk
81.21.68.198	PTR	ds163.dedicated.turbodns.co.uk
81.21.68.202	A	momento.co.uk
81.21.68.206	A	kiwi.startxt.com
81.21.68.228	PTR	ds105.dedicated.turbodns.co.uk
81.21.68.229	PTR	ds105.dedicated.turbodns.co.uk
81.21.68.236	A	melon.startxt.com
81.21.68.237	PTR	ds9549.dedicated.turbodns.co.uk
81.21.68.237	A	mail.dangersports.net
81.21.68.238	PTR	ds9549.dedicated.turbodns.co.uk
81.21.68.238	A	ibexinternet.net
81.21.68.238	A	inspecteq.com
81.21.68.252	A	pinnacleplc.co.uk