Robtex

Up: 167.164.2.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 167.164.3.0/25
Down right: 167.164.3.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
167.164.3.140	A+PTR	igate2.highmark.com
167.164.3.150	PTR	3dns2.lb.highmark.com
167.164.3.155	A+PTR	ns2.highmark.com
167.164.3.155	A	ns2.hmhs.com
167.164.3.155	A	ns2.bluecrossnepastore.com
167.164.3.250	PTR	vip-wlc.highmark.com