Robtex

Up: 198.7.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 198.7.30.0/25
Down right: 198.7.30.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.7.30.5	PTR	198-7-30-5.edgecastcdn.net
198.7.30.5	A	ns3.11122.transactcdn.com
198.7.30.5	A	ns3.n1cdn.net
198.7.30.6	PTR	198-7-30-6.edgecastcdn.net
198.7.30.6	A	ns4.11122.transactcdn.com
198.7.30.6	A	ns4.can.transactcdn.com
198.7.30.96	PTR	198-7-30-96.edgecastcdn.net
198.7.30.135	PTR	198-7-30-135.edgecastcdn.net