Robtex

Up: 198.40.238.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 198.40.239.0/25
Down right: 198.40.239.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.40.239.27	PTR	198-40-239-27.client.mchsi.com
198.40.239.27	A	devmoc.com
198.40.239.41	PTR	198-40-239-41.client.mchsi.com
198.40.239.41	A	cdmdnss.dmgov.org
198.40.239.76	A	mail1.cimbinc.com
198.40.239.82	PTR	198-40-239-82.client.mchsi.com
198.40.239.82	A	mail.ranlien.com
198.40.239.82	A	mail.dencoliensales.com
198.40.239.83	PTR	198-40-239-83.client.mchsi.com
198.40.239.83	A	ransoft.net
198.40.239.83	A	youriowacomputerguy.com
198.40.239.84	A+PTR	mail.ransoft.net
198.40.239.84	A	mail.ransoft.org
198.40.239.84	A	ransoft.org
198.40.239.85	A	ransoft.org
198.40.239.114	PTR	198-40-239-114.client.mchsi.com
198.40.239.114	A	mail.urbandalehealthcare.com
198.40.239.130	PTR	198-40-239-130.client.mchsi.com
198.40.239.138	A+PTR	mail.altoonacampus.com
198.40.239.166	A	mail2.rakerrhodes.com
198.40.239.226	A	mail.nyblaw.com
198.40.239.251	A+PTR	mail.farewaystores.com
198.40.239.252	PTR	198-40-239-252.client.mchsi.com
198.40.239.252	A	ws1.farewaystores.com
198.40.239.252	A	smtp1.farewaystores.com