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AS9919New Century InfoComm Tech Co., Ltd.

TaiwanRegistryAPNICTypeEyeball

As of 26th September 2026, AS9919 (New Century InfoComm Tech Co., Ltd.), an access network registered in Taiwan with APNIC, originates 857 IPv4 prefixes covering 3.1M addresses and 16 IPv6 prefixes. By IPv4 address space that makes it the 192nd-largest of the 79,516 networks we see originating IPv4, and the 6th-largest of 234 in Taiwan. It is seen behind 2 upstream networks, most often AS4780 (Digital United Inc.) and AS19551 (Incapsula Inc), and in front of 1 downstream network. Over 99% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 97% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

857

IPv6 prefixes

16

IPv4 addresses

3.1M

IPv6 /64s

551B

Upstream graph

The networks AS9919 is seen behind, one and two hops out, drawn from real AS paths.

AS9919Toward the internet core
Upstream graph for AS9919: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS9919New Century InfoC…This networkAS4780Digital United In…AS19551Incapsula IncAS3491PCCW Global (HK) …AS9002RETN LimitedAS1299Arelion (fka. Tel…AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS9919 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
233%
Peers
350%
Downstreams
117%

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

Upstreams of AS9919
NetworkCountryRelationshipPathsVantage pts
AS4780Digital United Inc.TWPeer68,998145
AS19551Incapsula IncUSPeer16281

Prefixes

All 873

The largest blocks AS9919 originates, widest first.

Largest prefixes originated by AS9919
PrefixAddressesVisibility
122.146.0.0/15131k81/81
218.210.0.0/15131k81/81
220.228.0.0/15131k81/81
61.66.0.0/1665.5k81/81
113.196.0.0/1665.5k81/81
122.146.0.0/1665.5k81/81
122.147.0.0/1665.5k81/81
218.32.0.0/1665.5k81/81
218.210.0.0/1665.5k81/81
218.211.0.0/1665.5k81/81

Routing health

How AS9919'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

  • Valid99.8%871
  • Invalid0.1%1
  • No ROA0.1%1

Propagation

  • Globally propagated90% of full-feed peers or more97.1%848
  • Partially propagated40% to 90%1.0%9
  • Seen by few peersUnder 40%1.8%16

Prefix sizes

IPv4 — 857 prefixes

IPv6 — 16 prefixes

  • /26275B × /646.3%1
  • /27137B × /6412.5%2
  • /36268M × /6425.0%4
  • /4865.5k × /6456.3%9

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Announced122.147.75.0/2422nd Sept 2026
  • Withdrawn103.215.230.0/2321st Sept 2026
  • Withdrawn123.51.244.0/2421st Sept 2026
  • Withdrawn218.32.250.0/2421st Sept 2026

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