AS208172 PV-HOSTED Proton AG

PV-HOSTED Proton AG · registered in Switzerland

IPv4 addresses23,80822 prefixes · <0.001% of announced IPv4

Rank in Switzerland#53largest network in CH by IPv4 space, of 741 · 0.16% of CH

Rank worldwide#5,618of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountrySwitzerland783 ASNs registered there

Open AS208172 in ASN lookup Look up an IP in this network (72.251.208.1) All networks in Switzerland

IPv4 prefixes

All 22 prefixes, in address order.

72.251.208.0/21
72.251.216.0/22
72.251.220.0/23
72.251.222.0/24
80.47.32.0/21
80.47.42.0/24
80.47.44.0/22
80.47.48.0/22
81.27.86.0/24
134.82.68.0/22
134.82.73.0/24
134.82.74.0/23
134.82.77.0/24
134.82.78.0/23
153.75.48.0/22
153.75.52.0/23
153.75.60.0/23
159.26.96.0/19
205.147.16.0/22
205.147.22.0/24
205.147.27.0/24
205.147.28.0/22

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AS39440#54 NETPLUSFR-AS netplusFR SA21,760

AS15517#55 NETSTREAM-CH Netstream Holding AG21,504

AS31736#56 SENSELAN-AS senseLAN GmbH19,456

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources