Robtex

Up: 68.232.188.0/22
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Down left: 68.232.190.0/24
Down right: 68.232.191.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.232.190.10	PTR	68-232-190-10.constant.com
68.232.190.10	A	z.mfcdn.net
68.232.190.10	A	mp-cdn.choopa.net
68.232.190.249	PTR	68-232-190-249.constant.com
68.232.190.255	PTR	68-232-190-255.constant.com
68.232.191.0	PTR	68.232.191.0.choopa.net
68.232.191.21	PTR	68.232.191.21.choopa.net
68.232.191.149	PTR	68.232.191.149.choopa.net
68.232.191.155	PTR	68.232.191.155.choopa.net
68.232.191.191	A+PTR	ns1.choopadns.com
68.232.191.191	A	rns1.choopadns.com
68.232.191.191	A	ns1.unmeteredservers.com
68.232.191.231	PTR	68.232.191.231.choopa.net
68.232.191.232	A+PTR	ns2.choopadns.com
68.232.191.232	A	ns2.sf-n.com
68.232.191.232	A	ns2.choopa.com
68.232.191.255	PTR	68.232.191.255.choopa.net