subnet.im

AS138374CERNET2 regional IX at Taiyuan University

ChinaRegistryAPNIC

As of 27th September 2026, AS138374 (CERNET2 regional IX at Taiyuan…), a network registered in China with APNIC, originates 56 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. 0% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

0

IPv6 prefixes

56

IPv4 addresses

0

IPv6 /64s

3.7M

Upstream graph

The networks AS138374 is seen behind, one and two hops out, drawn from real AS paths.

AS138374Toward the internet core
Upstream graph for AS138374: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS138374CERNET2 regional …This networkAS23910China Next Genera…AS4134China Telecom Bac…AS4538China Education a…

Networks observed one and two hops upstream of AS138374 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 AS138374
NetworkCountryRelationshipPathsVantage pts
AS23910China Next Generation Internet CERNET2CNPeer3927

Prefixes

All 56

The largest blocks AS138374 originates, widest first.

Largest prefixes originated by AS138374
PrefixAddressesVisibility
2001:250:c00::/4865.5k × /647/64
2001:250:c01::/4865.5k × /647/64
2001:250:c02::/4865.5k × /647/64
2001:250:c03::/4865.5k × /647/64
2001:250:c04::/4865.5k × /647/64
2001:250:c05::/4865.5k × /647/64
2001:250:c06::/4865.5k × /647/64
2001:250:c07::/4865.5k × /647/64
2001:250:c08::/4865.5k × /647/64
2001:250:c09::/4865.5k × /647/64

Routing health

How AS138374'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%56
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%56

Prefix sizes

IPv6 — 56 prefixes

  • /4865.5k × /64100.0%56

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS138374 started or stopped in this period.

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