Robtex

Up: 173.0.80.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 173.0.80.0/24
Down right: 173.0.81.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.0.80.4	A+PTR	apiagw-a.paypal.com
173.0.80.36	A+PTR	apiagw-a.paypal.com
173.0.81.1	A+PTR	notify.paypal.com
173.0.81.1	A	spherexohio.com
173.0.81.1	A	gilbishop.com
173.0.81.4	A+PTR	adnormserv-slc-a.paypal.com
173.0.81.33	A+PTR	notify.paypal.com
173.0.81.36	A+PTR	adnormserv-slc-b.paypal.com
173.0.81.65	A	notify.paypal.com