Robtex

Up: 64.147.123.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 64.147.123.0/26
Down right: 64.147.123.64/26
(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