subnet.im

AS133111CERNET New Technology Co., Ltd

ChinaRegistryAPNIC

As of 26th September 2026, AS133111 (CERNET New Technology Co., Ltd), a network registered in China with APNIC, originates 8 IPv4 prefixes covering 27.4k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 5,955th-largest of the 79,480 networks we see originating IPv4, and the 204th-largest of 607 in China. It is seen behind 3 upstream networks, most often AS23910 (China Next Generation Internet CERNET2) and AS4538 (China Education and Research Network…), and in front of 8 downstream networks. 82% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 45% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

8

IPv6 prefixes

3

IPv4 addresses

27.4k

IPv6 /64s

8.8T

Upstream graph

The networks AS133111 is seen behind, one and two hops out, drawn from real AS paths.

AS133111Toward the internet core
Upstream graph for AS133111: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS133111CERNET New Techno…This networkAS4538China Education a…AS9808China Mobile Back…AS23910China Next Genera…AS4837China Unicom Back…AS23764China Telecom Glo…AS58453China Mobile Inte…AS58807China Mobile Inte…AS4134China Telecom Bac…

Networks observed one and two hops upstream of AS133111 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

22

adjacent networks

Upstreams
314%
Peers
1150%
Downstreams
836%

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

Upstreams of AS133111
NetworkCountryRelationshipPathsVantage pts
AS23910China Next Generation Internet CERNET2CNPeer1,80764
AS4538China Education and Research Network CenterCNPeer23981
AS9808China Mobile BackboneCNPeer8918

Prefixes

The largest blocks AS133111 originates, widest first.

Largest prefixes originated by AS133111
PrefixAddressesVisibility
42.245.192.0/1816.4k18/81
42.201.32.0/198.2k18/81
240d:4000::/218.8T × /6464/64
103.81.200.0/221k14/81
42.201.60.0/2351281/81
42.201.62.0/2351218/81
42.201.33.0/2425681/81
42.245.221.0/2425680/81
43.252.48.0/2425618/81
2400:a980::/2934.4B × /6464/64

Routing health

How AS133111'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

  • Valid81.8%9
  • Invalid0.0%0
  • No ROA18.2%2

Propagation

  • Globally propagated90% of full-feed peers or more45.5%5
  • Partially propagated40% to 90%9.1%1
  • Seen by few peersUnder 40%45.5%5

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 3 prefixes

  • /218.8T × /6433.3%1
  • /2934.4B × /6433.3%1
  • /4865.5k × /6433.3%1

Recent changes

Announcements that started or stopped since 27th Aug 2026.

  • Withdrawn2400:a980:1400::/4023rd Sept 2026
  • Withdrawn2400:a980:14fd::/4823rd Sept 2026
  • Withdrawn2400:a980:14ff::/4823rd Sept 2026
  • Withdrawn2400:a980:1800::/4023rd Sept 2026
  • Withdrawn2400:a980:1f00::/4023rd Sept 2026
  • Withdrawn2400:a980:1ffe::/4823rd Sept 2026
  • Withdrawn2400:a980:2000::/4023rd Sept 2026
  • Withdrawn2400:a980:20f8::/4823rd Sept 2026
  • Withdrawn2400:a980:20f9::/4823rd Sept 2026
  • Withdrawn2400:a980:20fa::/4823rd Sept 2026
  • Withdrawn2400:a980:20fb::/4823rd Sept 2026
  • Withdrawn2400:a980:20fc::/4823rd Sept 2026

52 announced and 52 withdrawn in all; the most recent are shown.

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