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AS396303Black Mesa Corporation

United StatesRegistryARIN

As of 27th September 2026, AS396303 (Black Mesa Corporation), a network registered in the United States with ARIN, originates 3 IPv6 prefixes. It is seen behind 2 upstream networks, most often AS38008 (Aperture Science Limited) and AS6939 (Hurricane Electric LLC). 67% of its announcements have 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

0

IPv6 prefixes

3

IPv4 addresses

0

IPv6 /64s

16.9M

Upstream graph

The networks AS396303 is seen behind, one and two hops out, drawn from real AS paths.

AS396303Toward the internet core
Upstream graph for AS396303: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS396303Black Mesa Corpor…This networkAS6939Hurricane Electri…AS38008Aperture Science …AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS3356Lumen (Level 3)AS3491PCCW Global (HK) …

Networks observed one and two hops upstream of AS396303 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS396303
NetworkCountryRelationshipPathsVantage pts
AS38008Aperture Science LimitedHKPeer12965
AS6939Hurricane Electric LLCUSPeer6464

Prefixes

The largest blocks AS396303 originates, widest first.

Largest prefixes originated by AS396303
PrefixAddressesVisibility
2602:feda:f400::/4016.8M × /6464/65
2602:feda:102::/4865.5k × /6464/65
2602:feda:105::/4865.5k × /6465/65

Routing health

How AS396303'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

  • Valid66.7%2
  • Invalid0.0%0
  • No ROA33.3%1

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

IPv6 — 3 prefixes

  • /4016.8M × /6433.3%1
  • /4865.5k × /6466.7%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS396303 started or stopped in this period.

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