subnet.im

AS23875CSL Limited

Hong Kong SAR ChinaRegistryAPNIC

As of 10th November 2026, AS23875 (CSL Limited), a network registered in Hong Kong SAR China with APNIC, originates 7 IPv4 prefixes covering 1.8k addresses. By IPv4 address space that makes it the 30,387th-largest of the 80,723 networks we see originating IPv4, and the 367th-largest of 759 in Hong Kong SAR China. It is seen behind 6 upstream networks, most often AS3491 (PCCW Global (HK) Ltd.) and AS4635 (HKIX Route Servers). 43% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 86% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

7

IPv6 prefixes

0

IPv4 addresses

1.8k

IPv6 /64s

0

Upstream graph

The networks AS23875 is seen behind, one and two hops out, drawn from real AS paths.

AS23875Toward the internet core
Upstream graph for AS23875: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS23875CSL LimitedThis networkAS3491PCCW Global (HK) …AS4635HKIX Route ServersAS24482SG.GSAS31713Gateway Communica…AS49544i3D.net B.VAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS7713PT Telkom Indones…AS18106Viewqwest Pte LtdAS38623Metfone (Viettel …AS215859Hetzner Cloud - S…AS3741Dimension Data

Networks observed one and two hops upstream of AS23875 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

18

adjacent networks

Upstreams
633%
Peers
1267%
Downstreams
00%

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

Upstreams of AS23875
NetworkCountryRelationshipPathsVantage pts
AS3491PCCW Global (HK) Ltd.HKPeer40272
AS4635HKIX Route ServersHKPeer366
AS31713Gateway CommunicationsBEPeer155
AS49544i3D.net B.VNLPeer61
AS132337AxclusiveSGAdjacent61
AS24482SG.GSSGPeer61

Prefixes

The largest blocks AS23875 originates, widest first.

Largest prefixes originated by AS23875
PrefixAddressesVisibility
63.216.59.0/2425676/76
63.216.61.0/2425676/76
63.216.62.0/2425676/76
103.17.29.0/2425615/76
202.6.94.0/2425676/76
202.164.27.0/2425676/76
203.29.222.0/2425676/76

Routing health

How AS23875'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

  • Valid42.9%3
  • Invalid14.3%1
  • No ROA42.9%3

Propagation

  • Globally propagated90% of full-feed peers or more85.7%6
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%14.3%1

Prefix sizes

IPv4 — 7 prefixes

Recent changes

Announcements that started or stopped since 11th Oct 2026.

  • Announced103.17.29.0/2419th Oct 2026
  • Withdrawn103.17.29.0/2418th Oct 2026

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