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.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Proton
Proton AG is a Swiss technology company offering privacy-focused online services and software. It is majority owned by the non-profit Proton Foundation.
Top CIDR ranges
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.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 159.26.127.0/24 | 15,833 | 2026-07-23 20:03:42 |
| 72.251.215.0/24 | 14,646 | 2026-07-23 20:03:17 |
| 205.147.19.0/24 | 14,241 | 2026-07-23 19:58:48 |
| 205.147.27.0/24 | 13,410 | 2026-07-23 20:01:26 |
| 205.147.18.0/24 | 13,075 | 2026-07-23 20:04:46 |
| 134.82.68.0/24 | 10,023 | 2026-07-23 18:56:30 |
| 205.147.22.0/24 | 10,004 | 2026-07-23 18:56:30 |
| 134.82.70.0/24 | 9,496 | 2026-07-23 19:58:51 |
| 159.26.104.0/24 | 8,754 | 2026-07-23 19:59:22 |
| 159.26.121.0/24 | 8,633 | 2026-07-23 19:35:17 |
| 72.251.218.0/24 | 8,054 | 2026-07-23 20:04:56 |
| 159.26.102.0/24 | 7,356 | 2026-07-23 20:00:36 |
| 159.26.97.0/24 | 7,269 | 2026-07-23 20:04:51 |
| 159.26.126.0/24 | 7,172 | 2026-07-23 20:04:51 |
| 72.251.222.0/24 | 7,128 | 2026-07-23 20:00:25 |
| 159.26.115.0/24 | 6,954 | 2026-07-23 20:00:25 |
| 72.251.213.0/24 | 6,943 | 2026-07-23 20:04:58 |
| 159.26.123.0/24 | 6,943 | 2026-07-23 20:00:25 |
| 159.26.124.0/24 | 6,927 | 2026-07-23 20:00:25 |
| 72.251.221.0/24 | 6,359 | 2026-07-23 19:57:44 |
| 72.251.220.0/24 | 6,226 | 2026-07-23 20:04:56 |
| 159.26.122.0/24 | 5,698 | 2026-07-23 20:04:54 |
| 81.27.86.0/24 | 5,253 | 2026-07-23 20:01:52 |
| 159.26.120.0/24 | 5,076 | 2026-07-23 19:59:52 |
| 159.26.99.0/24 | 5,037 | 2026-07-23 19:59:31 |
| 72.251.210.0/24 | 4,997 | 2026-07-23 19:58:22 |
| 159.26.113.0/24 | 4,863 | 2026-07-23 20:03:36 |
| 72.251.212.0/24 | 4,857 | 2026-07-23 20:04:58 |
| 159.26.118.0/24 | 4,817 | 2026-07-23 20:01:05 |
| 159.26.110.0/24 | 4,715 | 2026-07-23 20:00:30 |
| 159.26.117.0/24 | 4,620 | 2026-07-23 19:59:28 |
| 159.26.125.0/24 | 4,586 | 2026-07-23 19:59:28 |
| 134.82.69.0/24 | 4,537 | 2026-07-23 20:01:39 |
| 72.251.211.0/24 | 4,425 | 2026-07-23 19:59:15 |
| 72.251.217.0/24 | 4,321 | 2026-07-23 19:50:34 |
| 159.26.114.0/24 | 4,299 | 2026-07-23 20:02:06 |
| 205.147.30.0/24 | 4,282 | 2026-07-23 20:00:39 |
| 205.147.16.0/24 | 4,246 | 2026-07-23 19:50:34 |
| 72.251.209.0/24 | 4,235 | 2026-07-23 19:50:34 |
| 159.26.101.0/24 | 4,185 | 2026-07-23 20:01:16 |
| 159.26.103.0/24 | 4,165 | 2026-07-23 20:01:05 |
| 72.251.208.0/24 | 4,165 | 2026-07-23 20:04:16 |
| 205.147.17.0/24 | 4,163 | 2026-07-23 20:00:36 |
| 159.26.107.0/24 | 4,158 | 2026-07-23 19:50:34 |
| 159.26.116.0/24 | 4,131 | 2026-07-23 19:59:36 |
| 159.26.109.0/24 | 4,067 | 2026-07-23 19:59:22 |
| 72.251.219.0/24 | 4,052 | 2026-07-23 19:58:43 |
| 134.82.71.0/24 | 4,051 | 2026-07-23 20:04:16 |
| 159.26.100.0/24 | 3,976 | 2026-07-23 19:59:28 |
| 205.147.28.0/24 | 3,944 | 2026-07-23 17:52:35 |
Showing top 50 of 62 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 15.9K IPv4 addresses distributed across 16 routed CIDR prefixes. The network is registered in United States.
Who operates AS208172?
AS208172 is operated by Proton AG. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS208172 registered in?
AS208172 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
