Robtex

Up: 66.210.216.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.210.217.0/25
Down right: 66.210.217.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.210.217.13	A+PTR	regulaone.bit-wizards.com
66.210.217.13	A+PTR	regulaone.bitwizards.com
66.210.217.14	A+PTR	teroknor.bit-wizards.com
66.210.217.19	A+PTR	deepspace9.bit-wizards.com
66.210.217.19	A+PTR	mail.bitwizards.com
66.210.217.19	A	mail.bit-wizards.com
66.210.217.24	A+PTR	dailin.bit-wizards.com
66.210.217.24	A+PTR	dialin.bit-wizards.com
66.210.217.24	A+PTR	equinox.bit-wizards.com
66.210.217.80	A+PTR	cibaats.bitwizards.com
66.210.217.100	A	bitwizdev.com