subnet.im

AS38587CERNET Internet Data Center

ChinaRegistryAPNIC

As of 10th November 2026, AS38587 (CERNET Internet Data Center), a network registered in China with APNIC, originates 2 IPv6 prefixes. It is seen behind 1 upstream network, most often AS23910 (China Next Generation Internet CERNET2). 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

0

IPv6 prefixes

2

IPv4 addresses

0

IPv6 /64s

16.8M

Upstream graph

The networks AS38587 is seen behind, one and two hops out, drawn from real AS paths.

AS38587Toward the internet core
Upstream graph for AS38587: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS38587CERNET Internet D…This networkAS23910China Next Genera…AS4538China Education a…AS23911China Next Genera…

Networks observed one and two hops upstream of AS38587 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS38587
NetworkCountryRelationshipPathsVantage pts
AS23910China Next Generation Internet CERNET2CNPeer12663

Prefixes

The largest blocks AS38587 originates, widest first.

Largest prefixes originated by AS38587
PrefixAddressesVisibility
2400:a980:4000::/4016.8M × /6463/63
2400:a980:40f9::/4865.5k × /6463/63

Routing health

How AS38587'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv6 — 2 prefixes

  • /4016.8M × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS38587 started or stopped in this period.

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