subnet.im

AS213959ObSimRef Diensten B.V. trading as AltStack

NetherlandsRegistryRIPE NCC

As of 11th November 2026, AS213959 (ObSimRef Diensten B.V. trading as…), a network registered in the Netherlands with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 49,320th-largest of the 80,747 networks we see originating IPv4, and the 670th-largest of 1,042 in the Netherlands. It is seen behind 11 upstream networks, most often AS42093 (InterRacks B.V.) and AS202585 (Nick Bouwhuis). 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

2

IPv6 prefixes

1

IPv4 addresses

512

IPv6 /64s

65.5k

Upstream graph

The networks AS213959 is seen behind, one and two hops out, drawn from real AS paths.

AS213959Toward the internet core
Upstream graph for AS213959: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS213959ObSimRef Diensten…This networkAS6939Hurricane Electri…AS8298IPng Networks GmbHAS42093InterRacks B.V.AS202585Nick BouwhuisAS212895Johannes ErnstAS20130Depaul UniversityAS132337AxclusiveAS25091IP-Max SAAS174Cogent Communicat…AS3356Lumen (Level 3)AS215085Maik Polman tradi…AS52025ParadoxNetworks L…

Networks observed one and two hops upstream of AS213959 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

55

adjacent networks

Upstreams
1120%
Peers
4480%
Downstreams
00%

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

Upstreams of AS213959
NetworkCountryRelationshipPathsVantage pts
AS42093InterRacks B.V.NLPeer9548
AS202585Nick BouwhuisNLPeer5740
AS212895Johannes ErnstDEPeer3333
AS6939Hurricane Electric LLCUSPeer84
AS39122Blacknight Internet Solutions LimitedIEPeer32
AS8298IPng Networks GmbHCHPeer32
AS25091IP-Max SACHPeer32
AS49544i3D.net B.VNLPeer32
AS24940Hetzner Online GmbHDEPeer32
AS132337AxclusiveSGAdjacent21

Prefixes

The largest blocks AS213959 originates, widest first.

Largest prefixes originated by AS213959
PrefixAddressesVisibility
157.173.74.0/2425675/76
185.104.131.0/2425675/76
2001:67c:f54::/4865.5k × /6462/63

Routing health

How AS213959'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%3
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS213959 started or stopped in this period.

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