Robtex

Up: 207.45.240.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 207.45.242.0/24
Down right: 207.45.243.0/24

IP	Type	Hostname
207.45.243.139	A+PTR	nycmail01.us.socgen.com
207.45.243.140	PTR	nycmail.sgcib.com
207.45.243.140	A+PTR	nycmail02.us.socgen.com
207.45.243.141	A+PTR	nycmail03.us.socgen.com
207.45.243.142	A+PTR	nycirprmg01.iap.socgen.com
207.45.243.142	A	nycmail.iap.socgen.com
207.45.243.142	A	nycmail.us.socgen.com
207.45.243.143	A+PTR	nycirprmg02.iap.socgen.com
207.45.243.143	A	nycmail.iap.socgen.com
207.45.243.143	A	nycmail.us.socgen.com
207.45.243.144	A+PTR	nycirprmg03.iap.socgen.com
207.45.243.144	A	nycmail.iap.socgen.com
207.45.243.144	A	nycmail.us.socgen.com
207.45.243.145	A+PTR	nycirprmg04.iap.socgen.com
207.45.243.145	A	nycmail.iap.socgen.com
207.45.243.145	A	nycmail.us.socgen.com
207.45.243.146	A+PTR	nycirprmg05.iap.socgen.com
207.45.243.146	A	nycmail.iap.socgen.com
207.45.243.146	A	nycmail.us.socgen.com