Robtex

Up: 185.70.40.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 185.70.40.128/26
Down right: 185.70.40.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.70.40.130	A+PTR	mail-40130.protonmail.ch
185.70.40.132	A+PTR	mail-40132.protonmail.ch
185.70.40.133	A+PTR	mail-40133.protonmail.ch
185.70.40.135	A+PTR	mail-40135.protonmail.ch
185.70.40.135	A	mail-1857040135.protonmail.ch
185.70.40.136	A+PTR	mail-40136.protonmail.ch
185.70.40.137	PTR	mail-40137.protonmail.ch
185.70.40.138	PTR	mail-40138.protonmail.ch
185.70.40.140	PTR	mail-40140.protonmail.ch
185.70.40.141	A+PTR	mail-40141.protonmail.ch
185.70.40.151	PTR	185-70-40-151.protonmail.ch
185.70.40.151	A	vdmee.com
185.70.40.151	A	sweetsinner.cc
185.70.40.152	PTR	185-70-40-152.protonmail.ch
185.70.40.152	A	support.protonmail.ch
185.70.40.153	PTR	185-70-40-153.protonmail.ch
185.70.40.155	PTR	185-70-40-155.protonmail.ch
185.70.40.155	A	app.protonmail.ch
185.70.40.181	PTR	185-70-40-181.protonmail.ch
185.70.40.181	A	protonmail.ch
185.70.40.181	A	www.protonmail.ch
185.70.40.182	PTR	185-70-40-182.protonmail.ch
185.70.40.182	A	indefsec.com
185.70.40.182	A	systemtelefonie.com
185.70.40.183	PTR	185-70-40-183.protonmail.ch
185.70.40.185	PTR	185-70-40-185.protonmail.ch
185.70.40.185	A	api.protonmail.ch
185.70.40.188	PTR	185-70-40-188.protonmail.ch
185.70.40.189	PTR	185-70-40-189.protonmail.ch
185.70.40.189	A	www.protonmail.com
185.70.40.189	A	nologsmail.com
185.70.40.192	PTR	185-70-40-192.protonmail.ch
185.70.40.192	A	secure.protonmail.com
185.70.40.195	PTR	185-70-40-195.protonmail.ch
185.70.40.195	A	pm.me
185.70.40.203	PTR	185-70-40-203.protonmail.ch
185.70.40.203	A	old.protonmail.com
185.70.40.204	PTR	185-70-40-204.protonmail.ch
185.70.40.204	A	beta.protonmail.com
185.70.40.230	PTR	185-70-40-230.protonmail.ch
185.70.40.230	A	api.protonvpn.ch
185.70.40.231	PTR	185-70-40-231.protonmail.ch
185.70.40.231	A	protonvpn.com