Robtex

Up: 81.21.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.21.73.0/25
Down right: 81.21.73.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.21.73.10	A	www.gssonline.co.uk
81.21.73.15	A+PTR	ds5573.dedicated.turbodns.co.uk
81.21.73.15	A	server5573.dedicated.webfusion.co.uk
81.21.73.15	A	ns1.moleproductions.net
81.21.73.16	A	jimstunt.com
81.21.73.16	A	pjga.com
81.21.73.16	A	u-dose.co.uk
81.21.73.29	A+PTR	ds656.dedicated.turbodns.co.uk
81.21.73.30	PTR	ds656.dedicated.turbodns.co.uk
81.21.73.35	A	etchtank.com
81.21.73.35	A	actinternet.co.uk
81.21.73.35	A	pacoulson.com
81.21.73.38	A	onlinehealthclub.com
81.21.73.41	A	cp.jp-sys.net
81.21.73.67	A+PTR	ds9535.dedicated.turbodns.co.uk
81.21.73.67	A	ns1.bignames.co.uk
81.21.73.68	PTR	ds9535.dedicated.turbodns.co.uk
81.21.73.68	A	www.middle-lane-ends-farm.net
81.21.73.68	A	castleglasscompany.co.uk
81.21.73.74	PTR	ds701.dedicated.turbodns.co.uk
81.21.73.77	PTR	server724.dedicated.webfusion.co.uk
81.21.73.78	PTR	server724.dedicated.webfusion.co.uk
81.21.73.111	PTR	ds580.dedicated.turbodns.co.uk
81.21.73.113	PTR	ds711.dedicated.turbodns.co.uk
81.21.73.116	A+PTR	server749.dedicated.webfusion.co.uk
81.21.73.116	A	ds749.dedicated.turbodns.co.uk
81.21.73.117	PTR	server749.dedicated.webfusion.co.uk
81.21.73.117	A	jandgfruiterers.co.uk
81.21.73.117	A	linkinsurance.co.uk
81.21.73.122	PTR	ds838.dedicated.turbodns.co.uk
81.21.73.123	PTR	ds838.dedicated.turbodns.co.uk
81.21.73.127	PTR	ds5573.dedicated.turbodns.co.uk
81.21.73.127	A	wounds-uk.org.uk
81.21.73.137	PTR	freestressball.co.uk
81.21.73.160	PTR	ds802.dedicated.turbodns.co.uk
81.21.73.161	PTR	ds802.dedicated.turbodns.co.uk
81.21.73.174	PTR	ds802.dedicated.turbodns.co.uk
81.21.73.177	PTR	ds501.dedicated.turbodns.co.uk
81.21.73.179	A	dartingtonha.co.uk
81.21.73.180	PTR	ds802.dedicated.turbodns.co.uk
81.21.73.181	PTR	ds5573.dedicated.turbodns.co.uk
81.21.73.197	A	transitcard.co.uk
81.21.73.197	A	www.grade1.biz
81.21.73.197	A	www.asfourcrystal.biz
81.21.73.206	A+PTR	ds9540.dedicated.turbodns.co.uk
81.21.73.206	A	ns1.golftoday.net
81.21.73.207	PTR	ds9540.dedicated.turbodns.co.uk
81.21.73.207	A	animaljokes.co.uk
81.21.73.207	A	golf-industry.com
81.21.73.242	PTR	ds838.dedicated.turbodns.co.uk
81.21.73.243	PTR	horsepassportagency.co.uk
81.21.73.247	PTR	ds684.dedicated.turbodns.co.uk
81.21.73.248	PTR	ds684.dedicated.turbodns.co.uk
81.21.73.249	PTR	ds684.dedicated.turbodns.co.uk
81.21.73.250	PTR	ds684.dedicated.turbodns.co.uk
81.21.73.251	PTR	ds684.dedicated.turbodns.co.uk
81.21.73.252	PTR	ds838.dedicated.turbodns.co.uk
81.21.73.254	PTR	ds684.dedicated.turbodns.co.uk