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AS48539Bifrost Systems OU

EstoniaRegistryRIPE NCC

As of 26th September 2026, AS48539 (Bifrost Systems OU), a network registered in Estonia with RIPE NCC, originates 36 IPv4 prefixes covering 9.2k addresses and 4 IPv6 prefixes. By IPv4 address space that makes it the 10,999th-largest of the 79,516 networks we see originating IPv4, and the 18th-largest of 172 in Estonia. It is seen behind 5 upstream networks, most often AS917 (Misaka Network, Inc.) and AS20473 (The Constant Company, LLC). 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

36

IPv6 prefixes

4

IPv4 addresses

9.2k

IPv6 /64s

262k

Upstream graph

The networks AS48539 is seen behind, one and two hops out, drawn from real AS paths.

AS48539Toward the internet core
Upstream graph for AS48539: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS48539Bifrost Systems OUThis networkAS917Misaka Network, I…AS20473The Constant Comp…AS35487Misaka Network, I…AS48386Misaka Network, I…AS58313Misaka Network, I…AS9002RETN LimitedAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS60068Datacamp Limited …AS931Hyonix

Networks observed one and two hops upstream of AS48539 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 AS48539
NetworkCountryRelationshipPathsVantage pts
AS917Misaka Network, Inc.USPeer1,951145
AS20473The Constant Company, LLCUSPeer88981
AS48386Misaka Network, Inc.USPeer16281
AS58313Misaka Network, Inc.USPeer8080
AS35487Misaka Network, Inc.USPeer8080

Prefixes

All 40

The largest blocks AS48539 originates, widest first.

Largest prefixes originated by AS48539
PrefixAddressesVisibility
2.152.78.0/2425681/81
5.252.156.0/2425681/81
45.81.151.0/2425681/81
45.85.120.0/2425681/81
45.85.122.0/2425681/81
45.85.123.0/2425681/81
79.98.39.0/2425681/81
87.192.81.0/2425681/81
89.21.84.0/2425681/81
89.28.207.0/2425680/81

Routing health

How AS48539'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%40
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

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

Prefix sizes

IPv4 — 36 prefixes

IPv6 — 4 prefixes

  • /4865.5k × /64100.0%4

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.