Robtex

Up: 173.0.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 173.0.80.0/23
Down right: 173.0.82.0/23
(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
173.0.82.33	A	agw.paypal.com
173.0.82.34	A	buyerauth.ppv.paypal.com
173.0.82.37	A+PTR	cr-payflow.ppv.paypal.com
173.0.82.40	A	cr.cybercash.com
173.0.82.40	A	cybercash-cr.ppv.paypal.com
173.0.82.41	A	test-cr.cybercash.com
173.0.82.42	A+PTR	eventapi.paypal.com
173.0.82.44	A	manager.paypal.com
173.0.82.44	A	manager.payflow.edge.paypal.com
173.0.82.46	A	partnermanager.paypal.com
173.0.82.47	A+PTR	payflow.ppv.paypal.com
173.0.82.48	A	payflowlink.payflow.edge.paypal.com
173.0.82.49	A+PTR	payflowpro.ppv.paypal.com
173.0.82.50	A	payments-reports.paypal.com
173.0.82.51	A	payments.verisign.com
173.0.82.52	A	pilot-agw.paypal.com
173.0.82.53	A+PTR	payflowmesh.ppv.paypal.com
173.0.82.56	A+PTR	cr-payflow.paypal.com
173.0.82.57	A+PTR	payflow.paypal.com
173.0.82.59	A+PTR	pilot-rms.paypal.com
173.0.82.60	A+PTR	smsapi.sandbox.paypal.com
173.0.82.63	A+PTR	pilot-payflowlink.paypal.com
173.0.82.65	PTR	reports.beta-sandbox.paypal.com
173.0.82.65	A+PTR	svcs.private.sandbox.paypal.com
173.0.82.66	A+PTR	ipnpb.sandbox.paypal.com
173.0.82.67	PTR	api.beta-sandbox.paypal.com
173.0.82.68	A	proxo.sandbox.paypal.com
173.0.82.69	A	pics.sandbox.paypal.com
173.0.82.72	PTR	ipn.beta-sandbox.pilot.paypal.com
173.0.82.74	PTR	origin-api-m.sandbox.paypal.com
173.0.82.75	A	batch.sandbox.paypal.com
173.0.82.75	A	accounts.sandbox.paypal.com
173.0.82.75	A	reports.sandbox.paypal.com
173.0.82.76	A+PTR	test.sandbox.paypal.com
173.0.82.77	A+PTR	www.sandbox.paypal.com
173.0.82.77	A	sandbox.paypal.com
173.0.82.78	A+PTR	api.sandbox.paypal.com
173.0.82.80	PTR	admin.sandbox.paypal.com
173.0.82.81	A+PTR	pointofsale.sandbox.paypal.com
173.0.82.82	PTR	api-s.sandbox.paypal.com
173.0.82.83	A	api-3t.sandbox.paypal.com
173.0.82.84	A	api-aa-3t.sandbox.paypal.com
173.0.82.88	PTR	origin2-ipnpb.sandbox.paypal.com
173.0.82.89	A	svcs.sandbox.paypal.com
173.0.82.90	A+PTR	origin1-ipnpb.sandbox.paypal.com
173.0.82.91	A	business.sandbox.paypal.com
173.0.82.96	PTR	api-slingshot.sandbox.paypal.com
173.0.82.99	A	fpdbs.sandbox.paypal.com
173.0.82.100	PTR	mobileclient.beta-sandbox.paypal.com
173.0.82.101	A	mobileclient.sandbox.paypal.com
173.0.82.102	A	3pimages.sandbox.paypal.com
173.0.82.103	PTR	3pimages.beta-sandbox.paypal.com
173.0.82.103	A	origin-c.sandbox.paypal.com
173.0.82.104	A	c.sandbox.paypal.com
173.0.82.104	A	active-c.sandbox.paypal.com
173.0.82.105	A+PTR	sha2-test-api-3t.sandbox.paypal.com
173.0.82.107	A	paypalmanager.sandbox.paypal.com
173.0.82.108	A	registration.sandbox.paypal.com
173.0.82.109	A	pandora.sandbox.paypal.com
173.0.82.114	PTR	securepayments.beta-sandbox.paypal.com
173.0.82.115	A	securepayments.sandbox.paypal.com
173.0.82.116	A+PTR	cors.api.sandbox.paypal.com
173.0.82.117	A+PTR	test-api.sandbox.paypal.com
173.0.82.118	A+PTR	test-api-3t.sandbox.paypal.com
173.0.82.121	A+PTR	old-api.sandbox.paypal.com
173.0.82.122	A	old-api-3t.sandbox.paypal.com
173.0.82.123	A	old-svcs.sandbox.paypal.com
173.0.82.124	A+PTR	sha2-test-svcs.sandbox.paypal.com
173.0.82.125	A+PTR	sha2-test-ipnpb.sandbox.paypal.com
173.0.82.126	A+PTR	ipn.sandbox.paypal.com
173.0.82.129	A+PTR	fb.paypalapps.com
173.0.82.133	A+PTR	charitybadge.x.com
173.0.82.134	A+PTR	www.paypal-mystore.com
173.0.82.134	A	paypal-mystore.com
173.0.82.136	A+PTR	vote.paypal.me
173.0.82.137	A	donate.paypal.me
173.0.82.138	A+PTR	integrationwizard.x.com
173.0.82.139	A+PTR	storefront.paypallabs.com
173.0.82.142	A+PTR	giving.paypallabs.com
173.0.82.143	A+PTR	www.paypal-labs.com
173.0.82.144	A+PTR	www.paypallabs.com
173.0.82.144	A	paypallabs.com
173.0.82.145	A+PTR	origin-www.thepaypalblog.com
173.0.82.145	A	thepaypalblog.com
173.0.82.146	PTR	www.paypal-blog.ca
173.0.82.148	A+PTR	payinperson.paypal-labs.com
173.0.82.151	PTR	minicart.paypal-labs.com
173.0.82.152	A+PTR	apps1.paypal-labs.com
173.0.82.153	A+PTR	apps2.paypal-labs.com
173.0.82.155	PTR	www.paypal-shoptimist.com
173.0.82.156	PTR	paypal.me
173.0.82.157	PTR	paypal-portal.com
173.0.82.162	PTR	payflowpro.paypal.com
173.0.82.162	A	payflowpro.payflow.edge.paypal.com
173.0.82.163	A+PTR	pilot-payflowpro.paypal.com
173.0.82.163	A	rydi-pnafalright-forandroid.com
173.0.82.164	A	paypalmanager.paypal.com
173.0.82.165	A	registration.paypal.com
173.0.82.166	A+PTR	rms.paypal.com
173.0.82.166	A	rms.ppv.paypal.com
173.0.82.172	A	xml-reg.paypal.com
173.0.82.174	A	xmlapi.paypal.com
173.0.82.196	A+PTR	nat.pod02.geo-trinity.com
173.0.82.197	PTR	vip0.pod02.geo-trinity.com
173.0.82.198	PTR	vip5.pod02.geo-trinity.com
173.0.82.200	A+PTR	ns1.pod02.geo-trinity.com
173.0.82.201	A+PTR	ns2.pod02.geo-trinity.com
173.0.82.202	A	slc2.stats.paypal.com
173.0.82.206	A	stats.glb.paypal.com
173.0.82.206	A	ns2.stats.paypal.com
173.0.82.206	A	b.stats.paypal.com
173.0.82.211	A	slc.stats.paypal.com
173.0.82.228	PTR	nat.cephc.geo-trinity.com
173.0.82.232	A	slc.sbox.stats.paypal.com
173.0.82.232	A	b.sbox.stats.paypal.com
173.0.82.232	A	baas.sbox.stats.paypal.com
173.0.82.234	A	ns1.cephc.geo-trinity.com