Robtex

Up: 59.99.244.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 59.99.246.0/24
Down right: 59.99.247.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
59.99.246.87	A	trainingtechnicalwriting.com
59.99.246.87	A	*.techtotalportal.com
59.99.246.87	A	instructionaldesigningtraining.com
59.99.247.21	PTR	mailrelay1.jhaveritrade.com
59.99.247.242	PTR	twltravel.com