subnet.im

AS18185National Chiao Tung University

TaiwanRegistryAPNIC

As of 23rd October 2026, AS18185 (National Chiao Tung University), a network registered in Taiwan with APNIC, originates 1 IPv4 prefix covering 4.1k addresses. By IPv4 address space that makes it the 17,060th-largest of the 79,666 networks we see originating IPv4, and the 93rd-largest of 233 in Taiwan. It is seen behind 1 upstream network, most often AS4780 (Digital United Inc.), and in front of 2 downstream networks. 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

1

IPv6 prefixes

0

IPv4 addresses

4.1k

IPv6 /64s

0

Upstream graph

The networks AS18185 is seen behind, one and two hops out, drawn from real AS paths.

AS18185Toward the internet core
Upstream graph for AS18185: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18185National Chiao Tu…This networkAS4780Digital United In…AS6453TATA Communicatio…AS9002RETN Limited

Networks observed one and two hops upstream of AS18185 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

6

adjacent networks

Upstreams
117%
Peers
350%
Downstreams
233%

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

Upstreams of AS18185
NetworkCountryRelationshipPathsVantage pts
AS4780Digital United Inc.TWPeer899139

Prefixes

The largest blocks AS18185 originates, widest first.

Largest prefixes originated by AS18185
PrefixAddressesVisibility
211.76.240.0/204.1k77/77

Routing health

How AS18185'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%1
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%1
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS18185 started or stopped in this period.

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