Robtex

Up: 5.83.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 5.83.96.0/22
Down right: 5.83.100.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.83.96.50	A+PTR	mail.chartwells.net
5.83.96.50	A	mail.clementineinsurance.com
5.83.96.50	A	email.clementineinsurance.com
5.83.96.58	PTR	mail.linbrooke.co.uk
5.83.97.38	PTR	remote.tripleline.com
5.83.97.38	A	mail2.tripleline.com
5.83.97.138	A	mail.rossendalegroup.co.uk
5.83.97.250	A	mail.osteopathy.org
5.83.98.16	A+PTR	mail.itnetuk.com
5.83.98.63	PTR	mail.hadilaw.com
5.83.98.76	PTR	mail.yarrington.co.uk
5.83.98.113	PTR	harrisonsllp.com
5.83.98.209	PTR	mail2.ziptechservices.co.uk
5.83.98.209	A	mail.ziptechservices.com
5.83.99.68	A	jackandcable.com
5.83.99.76	A	nwpcreative.com
5.83.99.81	A	object-source.com
5.83.99.86	A	lorchidee.co.uk
5.83.99.93	A	gayvon.com
5.83.100.97	PTR	mail.krssltd.com
5.83.100.97	A	mail.krssengineering.com
5.83.101.38	A	mail.gillakaster.com
5.83.101.178	PTR	mail.plmr.co.uk
5.83.102.147	A	mx1.provc.com
5.83.102.162	PTR	5-83-102-162.evanshillington.mezzonet.net
5.83.102.162	A	evanshillington.mezzonet.net
5.83.102.196	A+PTR	mail.mooreallen.co.uk
5.83.103.234	PTR	remote.hunterpage.net