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AS202820Chih-Jen CHENG

TaiwanRegistryRIPE NCCTypeEyeball

As of 23rd October 2026, AS202820 (Chih-Jen CHENG), an access network registered in Taiwan with RIPE NCC, originates 1 IPv6 prefix. It is seen behind 3 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS20473 (The Constant Company, 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

1

IPv4 addresses

0

IPv6 /64s

65.5k

Upstream graph

The networks AS202820 is seen behind, one and two hops out, drawn from real AS paths.

AS202820Toward the internet core
Upstream graph for AS202820: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS202820Chih-Jen CHENGThis networkAS6939Hurricane Electri…AS20473The Constant Comp…AS24482SG.GSAS18106Viewqwest Pte LtdAS20130Depaul UniversityAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS38623Metfone (Viettel …AS215859Hetzner Cloud - S…

Networks observed one and two hops upstream of AS202820 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

11

adjacent networks

Upstreams
327%
Peers
873%
Downstreams
00%

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

Upstreams of AS202820
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer5757
AS20473The Constant Company, LLCUSPeer44
AS24482SG.GSSGPeer22

Prefixes

The largest blocks AS202820 originates, widest first.

Largest prefixes originated by AS202820
PrefixAddressesVisibility
2400:70e0:bad::/4865.5k × /6463/64

Routing health

How AS202820'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

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS202820 started or stopped in this period.

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