Robtex

Up: 217.26.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 217.26.236.0/23
Down right: 217.26.238.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.26.236.2	PTR	v4.variant4.com
217.26.236.10	PTR	mta10.freebiegb.co.uk
217.26.236.30	PTR	mta30.freebiegb.co.uk
217.26.236.236	A	v4img.variant4.com
217.26.236.236	A	sif.variant4.com
217.26.236.254	A	espmail.comms.ukconsumeroptions.com
217.26.236.254	A	v4mail.emaildeliverence.com
217.26.236.254	A	espmail.m2.ukconsumeroptions.com
217.26.237.0	PTR	217-26-237-0.variant4.com
217.26.237.125	PTR	mta425.variant4.com
217.26.237.207	PTR	mta507.variant4.com
217.26.238.38	PTR	mta638.variant4.com
217.26.238.60	PTR	mta660.variant4.com
217.26.238.106	PTR	mta706.variant4.com
217.26.238.112	PTR	mta712.variant4.com
217.26.238.117	PTR	mta717.variant4.com
217.26.238.123	PTR	mta723.variant4.com
217.26.238.143	PTR	mta743.variant4.com
217.26.238.216	PTR	mta816.variant4.com
217.26.238.245	PTR	mta845.variant4.com
217.26.239.8	PTR	mta908.variant4.com
217.26.239.27	PTR	mta927.variant4.com
217.26.239.28	PTR	mta928.variant4.com
217.26.239.58	PTR	mta958.variant4.com
217.26.239.77	PTR	mta977.variant4.com
217.26.239.108	PTR	mta1008.variant4.com
217.26.239.147	PTR	v4mta239147.stdatafeeds.co.uk
217.26.239.187	PTR	v4mta239187.stdatafeeds.co.uk
217.26.239.206	PTR	v4mta239206.stdatafeeds.co.uk
217.26.239.211	PTR	v4mta239211.stdatafeeds.co.uk