Robtex

Up: 64.147.122.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.147.123.0/25
Down right: 64.147.123.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.147.123.1	A+PTR	64.147.123.1.static.nyinternet.net
64.147.123.5	A+PTR	64.147.123.5.static.nyinternet.net
64.147.123.9	A+PTR	64.147.123.9.static.nyinternet.net
64.147.123.11	A+PTR	64.147.123.11.static.nyinternet.net
64.147.123.17	A+PTR	64.147.123.17.static.nyinternet.net
64.147.123.17	A	spf.messagingengine.com
64.147.123.18	A+PTR	wnew4-smtp.messagingengine.com
64.147.123.18	A	spf.messagingengine.com
64.147.123.19	A+PTR	64.147.123.19.static.nyinternet.net
64.147.123.19	A	spf.messagingengine.com
64.147.123.20	A+PTR	wout4-smtp.messagingengine.com
64.147.123.20	A	spf.messagingengine.com
64.147.123.21	PTR	64.147.123.21.static.nyinternet.net
64.147.123.21	A	spf.messagingengine.com
64.147.123.23	A+PTR	64.147.123.23.static.nyinternet.net
64.147.123.24	PTR	wout1-smtp.messagingengine.com
64.147.123.24	A	spf.messagingengine.com
64.147.123.24	A	64.147.123.24.static.nyinternet.net
64.147.123.25	A+PTR	wout2-smtp.messagingengine.com
64.147.123.25	A	spf.messagingengine.com
64.147.123.25	A	64.147.123.25.static.nyinternet.net
64.147.123.26	PTR	wnew1-smtp.messagingengine.com
64.147.123.26	A	spf.messagingengine.com
64.147.123.27	PTR	64.147.123.27.static.nyinternet.net
64.147.123.27	A	spf.messagingengine.com
64.147.123.28	PTR	64.147.123.28.static.nyinternet.net
64.147.123.28	A	spf.messagingengine.com
64.147.123.29	PTR	64.147.123.29.static.nyinternet.net
64.147.123.29	A	spf.messagingengine.com
64.147.123.34	A+PTR	64.147.123.34.static.nyinternet.net
64.147.123.41	A+PTR	64.147.123.41.static.nyinternet.net
64.147.123.44	PTR	64.147.123.44.static.nyinternet.net
64.147.123.45	A+PTR	64.147.123.45.static.nyinternet.net
64.147.123.51	PTR	wmx1.messagingengine.com
64.147.123.51	A	in2-smtp.messagingengine.com.elwebbs.biz
64.147.123.51	A	64.147.123.51.static.nyinternet.net
64.147.123.52	A+PTR	wmx2.messagingengine.com
64.147.123.52	A	in2.smtp.messagingengine.com
64.147.123.52	A	in2-smtp.messagingengine.com
64.147.123.65	A+PTR	64.147.123.65.static.nyinternet.net
64.147.123.67	A+PTR	64.147.123.67.static.nyinternet.net
64.147.123.82	PTR	64.147.123.82.static.nyinternet.net
64.147.123.85	A+PTR	64.147.123.85.static.nyinternet.net
64.147.123.94	A+PTR	64.147.123.94.static.nyinternet.net
64.147.123.107	A+PTR	64.147.123.107.static.nyinternet.net
64.147.123.126	A+PTR	64.147.123.126.static.nyinternet.net
64.147.123.140	A+PTR	64.147.123.140.static.nyinternet.net
64.147.123.159	PTR	64.147.123.159.static.nyinternet.net
64.147.123.172	A+PTR	64.147.123.172.static.nyinternet.net
64.147.123.178	A+PTR	64.147.123.178.static.nyinternet.net
64.147.123.181	A+PTR	64.147.123.181.static.nyinternet.net
64.147.123.184	A+PTR	64.147.123.184.static.nyinternet.net
64.147.123.189	A+PTR	64.147.123.189.static.nyinternet.net
64.147.123.193	A+PTR	64.147.123.193.static.nyinternet.net
64.147.123.209	A+PTR	64.147.123.209.static.nyinternet.net
64.147.123.211	A+PTR	64.147.123.211.static.nyinternet.net
64.147.123.213	A+PTR	64.147.123.213.static.nyinternet.net
64.147.123.218	A+PTR	64.147.123.218.static.nyinternet.net
64.147.123.228	PTR	64.147.123.228.static.nyinternet.net
64.147.123.228	A	skymoth.com
64.147.123.229	A	www.fastmailtest.com
64.147.123.231	A+PTR	64.147.123.231.static.nyinternet.net
64.147.123.237	PTR	64.147.123.237.static.nyinternet.net
64.147.123.237	A	ns1.fastmailtest.com
64.147.123.238	A	fmns1.fastmailtest.com
64.147.123.239	PTR	64.147.123.239.static.nyinternet.net
64.147.123.239	A	fmns2.fastmailtest.com
64.147.123.240	A+PTR	64.147.123.240.static.nyinternet.net
64.147.123.243	A+PTR	64.147.123.243.static.nyinternet.net
64.147.123.246	A+PTR	64.147.123.246.static.nyinternet.net
64.147.123.247	A+PTR	64.147.123.247.static.nyinternet.net
64.147.123.252	A+PTR	64.147.123.252.static.nyinternet.net