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AS208172Proton AG

SwitzerlandRegistryRIPE NCC

As of 27th September 2026, AS208172 (Proton AG), a network registered in Switzerland with RIPE NCC, originates 75 IPv4 prefixes covering 19.2k addresses. By IPv4 address space that makes it the 7,258th-largest of the 79,523 networks we see originating IPv4, and the 60th-largest of 739 in Switzerland. It is seen behind 5 upstream networks, most often AS60068 (Datacamp Limited (CDN77 / DataPacket)) and AS136557 (Host Universal Pty Ltd). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

75

IPv6 prefixes

0

IPv4 addresses

19.2k

IPv6 /64s

0

Upstream graph

The networks AS208172 is seen behind, one and two hops out, drawn from real AS paths.

AS208172Toward the internet core
Upstream graph for AS208172: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS208172Proton AGThis networkAS9009M247 Europe SRLAS23470ReliableSite.Net …AS60068Datacamp Limited …AS136557Host Universal Pt…AS396356Latitude.shAS2914NTT America, Inc.AS174Cogent Communicat…AS1299Arelion (fka. Tel…AS4637Telstra Internati…AS3257GTT Communication…

Networks observed one and two hops upstream of AS208172 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

11

adjacent networks

Upstreams
545%
Peers
655%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS208172
NetworkCountryRelationshipPathsVantage pts
AS60068Datacamp Limited (CDN77 / DataPacket)GBPeer5,40281
AS136557Host Universal Pty LtdAUPeer24281
AS23470ReliableSite.Net LLCUSPeer16181
AS9009M247 Europe SRLROPeer16080
AS396356Latitude.shUSPeer8181

Prefixes

All 75

The largest blocks AS208172 originates, widest first.

Largest prefixes originated by AS208172
PrefixAddressesVisibility
72.251.208.0/2425680/81
72.251.209.0/2425681/81
72.251.210.0/2425681/81
72.251.211.0/2425680/81
72.251.212.0/2425681/81
72.251.213.0/2425681/81
72.251.214.0/2425680/81
72.251.215.0/2425681/81
72.251.216.0/2425680/81
72.251.217.0/2425681/81

Routing health

How AS208172's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%75
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%75
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 75 prefixes

Recent changes

Announcements that started or stopped since 28th Aug 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.