Robtex

Up: 199.242.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 199.242.4.0/25
Down right: 199.242.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.242.4.2	PTR	nyczfwl001.bfm.com
199.242.4.16	A+PTR	nyczftp001.bfm.com
199.242.4.20	PTR	ns1.blackrock.com
199.242.4.20	A	ns1.blackrockfinancial.com
199.242.4.20	A	ns1.blackrockadvisors.net
199.242.4.23	A+PTR	igw1.blackrock.com
199.242.4.23	A	igw1.bfm.com
199.242.4.23	A	cal.bfm.com
199.242.4.25	A	nyczmls003.blackrock.com
199.242.4.130	A	nyczwww002.bfm.com
199.242.4.135	A+PTR	nyczrax001.bfm.com