Robtex

Up: 148.168.32.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 148.168.33.0/25
Down right: 148.168.33.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
148.168.33.9	PTR	ns1.pfizer.com
148.168.33.10	PTR	ns2.pfizer.com
148.168.33.81	PTR	ff1nv.pfizer.com
148.168.33.81	PTR	gronv.pfizer.com
148.168.33.81	A+PTR	gronv1.pfizer.com
148.168.33.82	PTR	ff1nv.pfizer.com
148.168.33.82	PTR	gronv.pfizer.com
148.168.33.82	A+PTR	gronv1.pfizer.com
148.168.33.83	PTR	ff1nv.pfizer.com
148.168.33.83	PTR	gronv.pfizer.com
148.168.33.83	A+PTR	gronv1.pfizer.com
148.168.33.87	A+PTR	anyconnect.pfizer.com
148.168.33.91	A+PTR	gro-aruba01.pfizer.com
148.168.33.91	A+PTR	gro-aruba-m3-01.pfizer.com
148.168.33.93	A+PTR	cr-amer.pfizer.com
148.168.33.94	A+PTR	gro-aruba-m3-04.pfizer.com
148.168.33.94	A+PTR	cm-amer.pfizer.com