subnet.im

AS4158City University of Hong Kong

Hong Kong SAR ChinaRegistryAPNIC

As of 11th November 2026, AS4158 (City University of Hong Kong), a network registered in Hong Kong SAR China with APNIC, originates 9 IPv4 prefixes covering 83.2k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 2,735th-largest of the 80,747 networks we see originating IPv4, and the 48th-largest of 760 in Hong Kong SAR China. It is seen behind 3 upstream networks, most often AS3662 (Joint Universities Computer Centre…) and AS45474 (Nexusguard Pte. Ltd.). None of its announcements have a valid RPKI ROA. 90% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

9

IPv6 prefixes

1

IPv4 addresses

83.2k

IPv6 /64s

65.5k

Upstream graph

The networks AS4158 is seen behind, one and two hops out, drawn from real AS paths.

AS4158Toward the internet core
Upstream graph for AS4158: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS4158City University o…This networkAS3662Joint Universitie…AS45474Nexusguard Pte. L…AS137207Joint Universitie…AS6939Hurricane Electri…AS17824Pacific One Net L…AS6453TATA Communicatio…AS6461Zayo BandwidthAS11537Internet2AS23855Singapore Advance…

Networks observed one and two hops upstream of AS4158 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
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS4158
NetworkCountryRelationshipPathsVantage pts
AS3662Joint Universities Computer Centre LimitedHKPeer637133
AS45474Nexusguard Pte. Ltd.SGPeer5555
AS137207Joint Universities Computer Centre LimitedHKPeer335

Prefixes

The largest blocks AS4158 originates, widest first.

Largest prefixes originated by AS4158
PrefixAddressesVisibility
144.214.0.0/1665.5k76/76
175.159.64.0/198.2k76/76
175.159.200.0/212k76/76
202.125.216.0/212k76/76
203.188.80.0/212k76/76
175.159.208.0/221k76/76
202.125.252.0/221k76/76
203.188.88.0/221k76/76
175.159.201.0/2425655/76
2001:ce0:5::/4865.5k × /6462/63

Routing health

How AS4158'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%10

Propagation

  • Globally propagated90% of full-feed peers or more90.0%9
  • Partially propagated40% to 90%10.0%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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