subnet.im

AS206434CHENG-CHIH TSAI

TaiwanRegistryRIPE NCC

As of 27th September 2026, AS206434 (CHENG-CHIH TSAI), a network registered in Taiwan with RIPE NCC, originates 2 IPv6 prefixes. It is seen behind 1 upstream network, most often AS48231 (CRE Network, LLC). 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

269M

Upstream graph

The networks AS206434 is seen behind, one and two hops out, drawn from real AS paths.

AS206434Toward the internet core
Upstream graph for AS206434: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS206434CHENG-CHIH TSAIThis networkAS48231CRE Network, LLCAS6939Hurricane Electri…AS20473The Constant Comp…

Networks observed one and two hops upstream of AS206434 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 AS206434
NetworkCountryRelationshipPathsVantage pts
AS48231CRE Network, LLCUSPeer12864

Prefixes

The largest blocks AS206434 originates, widest first.

Largest prefixes originated by AS206434
PrefixAddressesVisibility
2400:3e20:4000::/36268M × /6464/64
2602:f7a7:20::/4865.5k × /6464/64

Routing health

How AS206434'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

  • /36268M × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS206434 started or stopped in this period.

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