subnet.im

AS218771Snark Holding Corp.

United StatesRegistryRIPE NCC

As of 11th November 2026, AS218771 (Snark Holding Corp.), a network registered in the United States with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 59,982nd-largest of the 80,747 networks we see originating IPv4, and the 13,089th-largest of 18,752 in the United States. It is seen behind 4 upstream networks, most often AS212895 (Johannes Ernst) and AS36236 (NetActuate, Inc). 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

1

IPv6 prefixes

2

IPv4 addresses

256

IPv6 /64s

131k

Upstream graph

The networks AS218771 is seen behind, one and two hops out, drawn from real AS paths.

AS218771Toward the internet core
Upstream graph for AS218771: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS218771Snark Holding Cor…This networkAS36236NetActuate, IncAS207841Inferno Communica…AS209735Lagrange Cloud Te…AS212895Johannes ErnstAS174Cogent Communicat…AS2914NTT America, Inc.AS61049Exascale LtdAS137409GSL Networks Pty …AS44355Colocation LtdAS6939Hurricane Electri…AS52025ParadoxNetworks L…

Networks observed one and two hops upstream of AS218771 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

8

adjacent networks

Upstreams
450%
Peers
450%
Downstreams
00%

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

Upstreams of AS218771
NetworkCountryRelationshipPathsVantage pts
AS212895Johannes ErnstDEPeer135111
AS36236NetActuate, IncUSPeer3127
AS207841Inferno Communications LtdGBPeer2323
AS209735Lagrange Cloud Technologies LimitedGBPeer1111

Prefixes

The largest blocks AS218771 originates, widest first.

Largest prefixes originated by AS218771
PrefixAddressesVisibility
205.153.18.0/2425675/76
2602:f6d0:e0::/4865.5k × /6463/63
2a06:9801:f99::/4865.5k × /6462/63

Routing health

How AS218771'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 — 1 prefixes

IPv6 — 2 prefixes

  • /4865.5k × /64100.0%2

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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