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AS138421China Unicom

ChinaRegistryAPNIC

As of 10th November 2026, AS138421 (China Unicom), a network registered in China with APNIC, originates 257 IPv4 prefixes covering 191k addresses and 40 IPv6 prefixes. By IPv4 address space that makes it the 1,435th-largest of the 80,723 networks we see originating IPv4, and the 87th-largest of 617 in China. It is seen behind 1 upstream network, most often AS4837 (China Unicom Backbone), and in front of 2 downstream networks. 97% of its announcements have a valid RPKI ROA; 3 are RPKI-invalid. 86% of its routes reach at least 90% of full-feed peers, and 42 prefixes are also originated by another network.

At a glance

IPv4 prefixes

257

IPv6 prefixes

40

IPv4 addresses

191k

IPv6 /64s

35.1M

Upstream graph

The networks AS138421 is seen behind, one and two hops out, drawn from real AS paths.

AS138421Toward the internet core
Upstream graph for AS138421: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS138421China UnicomThis networkAS4837China Unicom Back…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS138421 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

7

adjacent networks

Upstreams
114%
Peers
457%
Downstreams
229%

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

Upstreams of AS138421
NetworkCountryRelationshipPathsVantage pts
AS4837China Unicom BackboneCNPeer20,203138

Prefixes

All 297

The largest blocks AS138421 originates, widest first.

Largest prefixes originated by AS138421
PrefixAddressesVisibility
114.67.64.0/1816.4k10/76
116.63.192.0/1816.4k10/76
116.63.32.0/198.2k9/76
122.9.64.0/198.2k9/76
140.210.128.0/198.2k8/76
220.196.224.0/198.2k75/76
112.65.240.0/204.1k76/76
116.63.96.0/204.1k10/76
116.198.144.0/204.1k8/76
122.9.176.0/204.1k11/76

Routing health

How AS138421'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

  • Valid97.3%289
  • Invalid1.0%3
  • No ROA1.7%5

Propagation

  • Globally propagated90% of full-feed peers or more85.5%254
  • Partially propagated40% to 90%0.3%1
  • Seen by few peersUnder 40%14.1%42

Prefix sizes

IPv4 — 257 prefixes

IPv6 — 40 prefixes

  • /441M × /6482.5%33
  • /4865.5k × /6417.5%7

Recent changes

Announcements that started or stopped since 11th Oct 2026.

13 announced and 2 withdrawn in all; the most recent are shown.

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