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Autonomous System

AS208172

Proton AG

Proton AG Switzerland 🌐 proton.ch
Announced IPs
23,808
CIDR prefixes
22
ASN
AS208172

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

65/100
Moderate
How this score is built
  • Baseline (neutral) 65
  • Trust score 65 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

About Proton

Proton AG is a Swiss for-profit technology company offering privacy-focused online services and software. It is majority owned by the non-profit Proton Foundation as a shareholder.

Founded
2014
Headquarters
Plan-les-Ouates
Industry
software industry
Parent
Proton Foundation
Official website ↗ Summary from Wikipedia, CC BY-SA 4.0 · Data from Wikidata

Web3 footprint

AS208172 hosts 5 observed decentralized-network nodes across 2 networks. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.

IPFS IPFS 4 Ξ Ethereum 1

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
159.26.96.0/19 8.2K
0.0%
Proton AG CH — —
72.251.208.0/21 2.0K
0.0%
Proton AG CH — —
80.47.32.0/21 2.0K
0.0%
Proton AG CH — —
159.26.96.0/21 2.0K
0.0%
Proton AG US Illinois Chicago
72.251.216.0/22 1.0K
0.0%
Proton AG CH — —
80.47.44.0/22 1.0K
0.0%
Proton AG CH — —
80.47.48.0/22 1.0K
0.0%
Proton AG CH — —
134.82.68.0/22 1.0K
0.0%
Proton AG CH — —
153.75.48.0/22 1.0K
0.0%
Proton AG CH — —
205.147.16.0/22 1.0K
0.0%
Proton AG CH — —
205.147.28.0/22 1.0K
0.0%
Proton AG CH — —
72.251.220.0/23 512
0.0%
Proton AG CH — —
80.47.36.0/23 512
0.0%
Proton AG US California Los Angeles
134.82.74.0/23 512
0.0%
Proton AG CH — —
134.82.78.0/23 512
0.0%
Proton AG CH — —
153.75.52.0/23 512
0.0%
Proton AG CH — —
153.75.60.0/23 512
0.0%
Proton AG CH — —
72.251.208.0/24 256
0.0%
Proton AG CA Ontario Toronto
72.251.209.0/24 256
0.0%
Proton AG ES Madrid Madrid
72.251.210.0/24 256
0.0%
Proton AG NZ Auckland Auckland
72.251.211.0/24 256
0.0%
Proton AG FI Uusimaa Helsinki
72.251.212.0/24 256
0.0%
Proton AG PT Lisbon Lisbon
72.251.213.0/24 256
0.0%
Proton AG SG — —
72.251.214.0/24 256
0.0%
Proton AG BA Federation of Bosnia and Herzegovina Sarajevo
72.251.215.0/24 256
0.0%
Proton AG IL Tel Aviv Tel Aviv
72.251.216.0/24 256
0.0%
Proton AG HR City of Zagreb Zagreb
72.251.217.0/24 256
0.0%
Proton AG NL North Holland Amsterdam
72.251.218.0/24 256
0.0%
Proton AG AE Emirate of Fujairah Fujairah
72.251.219.0/24 256
0.0%
Proton AG US New York New York
72.251.222.0/24 256
0.0%
Proton AG CH — —
80.47.32.0/24 256
0.0%
Proton AG GB England London
80.47.33.0/24 256
0.0%
Proton AG DE Hesse Frankfurt am Main
80.47.34.0/24 256
0.0%
Proton AG AT Vienna Vienna
80.47.35.0/24 256
0.0%
Proton AG FR Île-de-France Paris
80.47.38.0/24 256
0.0%
Proton AG ES Madrid Madrid
80.47.39.0/24 256
0.0%
Proton AG NL North Holland Amsterdam
80.47.42.0/24 256
0.0%
Proton AG CH — —
80.47.44.0/24 256
0.0%
Proton AG GB England London
80.47.45.0/24 256
0.0%
Proton AG DE Hesse Frankfurt am Main
80.47.46.0/24 256
0.0%
Proton AG AU Victoria Melbourne
80.47.47.0/24 256
0.0%
Proton AG US California Los Angeles
80.47.48.0/24 256
0.0%
Proton AG US Texas Dallas
80.47.49.0/24 256
0.0%
Proton AG NL North Holland Amsterdam
80.47.50.0/24 256
0.0%
Proton AG CH Zurich Zurich
80.47.51.0/24 256
0.0%
Proton AG JP Tokyo Tokyo
81.27.86.0/24 256
0.0%
Proton AG CH — —
134.82.68.0/24 256
0.0%
Proton AG US Florida Miami
134.82.69.0/24 256
0.0%
Proton AG SG — —
134.82.70.0/24 256
0.0%
Proton AG US Florida Miami
134.82.71.0/24 256
0.0%
Proton AG CA Alberta Calgary
134.82.73.0/24 256
0.0%
Proton AG CH — —
134.82.77.0/24 256
0.0%
Proton AG CH — —
134.82.78.0/24 256
0.0%
Proton AG BG Sofia-Capital Sofia
134.82.79.0/24 256
0.0%
Proton AG FR New Aquitaine Bordeaux
153.75.48.0/24 256
0.0%
Proton AG ES Catalonia Barcelona
153.75.49.0/24 256
0.0%
Proton AG SK — —
153.75.50.0/24 256
0.0%
Proton AG HU Budapest Budapest
153.75.51.0/24 256
0.0%
Proton AG FI Uusimaa Helsinki
153.75.52.0/24 256
0.0%
Proton AG HK — —
153.75.53.0/24 256
0.0%
Proton AG AU New South Wales Sydney
153.75.60.0/24 256
0.0%
Proton AG US Massachusetts Boston
153.75.61.0/24 256
0.0%
Proton AG FR Île-de-France Paris
159.26.104.0/24 256
0.0%
Proton AG DE Hesse Frankfurt am Main
159.26.105.0/24 256
0.0%
Proton AG FR Île-de-France Paris
159.26.106.0/24 256
0.0%
Proton AG GB England London
159.26.107.0/24 256
0.0%
Proton AG ES Madrid Madrid
159.26.108.0/24 256
0.0%
Proton AG SE Stockholm County Stockholm
159.26.109.0/24 256
0.0%
Proton AG AT Vienna Vienna
159.26.110.0/24 256
0.0%
Proton AG PL Mazovia Warsaw
159.26.111.0/24 256
0.0%
Proton AG CZ Prague Prague
159.26.112.0/24 256
0.0%
Proton AG FR Provence-Alpes-Côte d'Azur Marseille
159.26.113.0/24 256
0.0%
Proton AG PT Lisbon Lisbon
159.26.114.0/24 256
0.0%
Proton AG DK Capital Region Copenhagen
159.26.115.0/24 256
0.0%
Proton AG SG — —
159.26.116.0/24 256
0.0%
Proton AG IE Leinster Dublin
159.26.117.0/24 256
0.0%
Proton AG RO Bucharest Bucharest
159.26.118.0/24 256
0.0%
Proton AG BE Brussels Capital Brussels
159.26.119.0/24 256
0.0%
Proton AG JP Tokyo Tokyo
159.26.120.0/24 256
0.0%
Proton AG UA Kyiv City Kyiv
159.26.121.0/24 256
0.0%
Proton AG GR Attica Athens
159.26.122.0/24 256
0.0%
Proton AG AR Buenos Aires F.D. Buenos Aires
159.26.123.0/24 256
0.0%
Proton AG SG — —
159.26.124.0/24 256
0.0%
Proton AG SG — —
159.26.125.0/24 256
0.0%
Proton AG RO — —
159.26.126.0/24 256
0.0%
Proton AG US — —
205.147.16.0/24 256
0.0%
Proton AG NL North Holland Amsterdam
205.147.17.0/24 256
0.0%
Proton AG NO Oslo Oslo
205.147.18.0/24 256
0.0%
Proton AG TR Istanbul Istanbul
205.147.19.0/24 256
0.0%
Proton AG AR Buenos Aires F.D. Buenos Aires
205.147.22.0/24 256
0.0%
Proton AG CH — —
205.147.27.0/24 256
0.0%
Proton AG CH — —
205.147.28.0/24 256
0.0%
Proton AG DE State of Berlin Berlin
205.147.29.0/24 256
0.0%
Proton AG GB England Manchester
205.147.30.0/24 256
0.0%
Proton AG IT Lombardy Milan
72.251.222.128/25 128
0.0%
Proton AG SG — —
205.147.31.128/25 128
0.0%
Proton AG FR — —
72.251.222.64/26 64
0.0%
Proton AG SG — —
205.147.31.64/26 64
0.0%
Proton AG FR — —
72.251.222.0/27 32
0.0%
Proton AG SG — —
72.251.222.32/27 32
0.0%
Proton AG BD — —

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS208172 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
159.26.127.0/24 113,309 2026-11-10 20:56:10
72.251.221.0/24 55,109 2026-11-10 19:41:32
153.75.53.0/24 52,318 2026-11-10 19:41:49
134.82.69.0/24 51,903 2026-11-10 19:41:42
72.251.210.0/24 44,572 2026-11-10 19:41:49
72.251.220.0/24 42,895 2026-11-10 19:41:32
205.147.27.0/24 37,438 2026-11-10 19:42:11
205.147.19.0/24 34,424 2026-11-10 20:54:21
72.251.218.0/24 33,285 2026-11-10 20:55:02
72.251.215.0/24 28,002 2026-11-10 19:46:06
205.147.18.0/24 26,813 2026-11-10 19:41:54
159.26.121.0/24 25,141 2026-11-10 19:42:00
134.82.68.0/24 19,068 2026-11-10 19:41:44
205.147.22.0/24 19,028 2026-11-10 19:42:14
80.47.32.0/24 18,783 2026-11-10 19:45:33
134.82.70.0/24 18,564 2026-11-10 19:41:44
159.26.104.0/24 17,758 2026-11-10 19:42:17
134.82.71.0/24 17,219 2026-11-10 19:41:34
81.27.86.0/24 16,703 2026-11-10 19:41:33
159.26.122.0/24 16,690 2026-11-10 20:51:49
159.26.97.0/24 16,385 2026-11-10 19:42:14
72.251.222.0/24 16,337 2026-11-10 19:41:31
159.26.126.0/24 16,316 2026-11-10 19:42:14
159.26.123.0/24 15,966 2026-11-10 19:41:51
159.26.124.0/24 15,930 2026-11-10 19:41:51
72.251.213.0/24 15,888 2026-11-10 19:41:31
159.26.115.0/24 15,884 2026-11-10 19:41:51
134.82.77.0/24 15,620 2026-11-10 19:41:33
159.26.102.0/24 14,009 2026-11-10 19:41:59
159.26.117.0/24 13,717 2026-11-10 19:42:12
159.26.125.0/24 13,591 2026-11-10 19:42:12
159.26.99.0/24 13,362 2026-11-10 19:41:54
159.26.120.0/24 13,271 2026-11-10 19:42:19
205.147.16.0/24 12,964 2026-11-10 19:42:17
159.26.110.0/24 12,930 2026-11-10 19:42:18
72.251.209.0/24 12,617 2026-11-10 19:41:39
72.251.217.0/24 12,594 2026-11-10 19:41:48
159.26.107.0/24 12,426 2026-11-10 19:42:10
159.26.118.0/24 12,283 2026-11-10 19:42:15
159.26.101.0/24 11,932 2026-11-10 19:42:09
159.26.119.0/24 11,888 2026-11-10 19:42:07
159.26.114.0/24 11,820 2026-11-10 19:42:03
159.26.116.0/24 11,397 2026-11-10 19:42:13
72.251.212.0/24 11,386 2026-11-10 19:41:28
205.147.28.0/24 11,363 2026-11-10 19:42:08
159.26.113.0/24 11,349 2026-11-10 19:41:28
159.26.109.0/24 11,336 2026-11-10 19:42:01
72.251.211.0/24 11,268 2026-11-10 19:41:45
205.147.30.0/24 11,169 2026-11-10 19:42:02
205.147.17.0/24 11,127 2026-11-10 19:41:56

Showing top 50 of 94 announced prefixes by sample volume.

Frequently Asked Questions

What is AS208172?

AS208172 is an Autonomous System Number assigned to Proton AG. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS208172 announce?

AS208172 announces 23.8K IPv4 addresses distributed across 22 routed CIDR prefixes. The network is registered in Switzerland.

Who operates AS208172?

AS208172 is operated by Proton AG. The organization is based in Switzerland. You can view all IP ranges and related ASNs on the organization page.

What country is AS208172 registered in?

AS208172 is registered in Switzerland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-11-10 21:09:06 UTC
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