AS9735 — HKDNR-AS-AP Hong Kong Domain Name Registration Co. Ltd

AS9735 announces 2 IPv4 prefixes covering 512 addresses and 3 IPv6 prefixes.

About this network

AS9735 (HKDNR-AS-AP) is held by the Hong Kong Domain Name Registration Company Limited (HKDNR), the wholly-owned registrar subsidiary of HKIRC, the body designated by the Hong Kong government to run the .hk and .香港 country-code top-level domains. This is registry infrastructure, not a service provider network.

What it's used for

The routing evidence matches a ccTLD operator precisely. RIS shows just 2 IPv4 prefixes — 203.119.2.0/24 and 203.119.87.0/24, 512 addresses in total — announced to a single observed neighbour, plus four IPv6 /36s carved out of 2001:dca::/32. Every sampled address has reverse DNS under hkdnr.hk (5-2-int-rev.hkdnr.hk and similar), so the space is used by the registry itself rather than sublet to customers. The single neighbour and the tiny footprint tell you this AS exists so that HKIRC/HKDNR can originate its own address space for name-server and registration-system reachability, with routing independence from any one carrier. The 203.119.0.0/16 range is well known as APNIC-region infrastructure space, which is where regional registry and DNS services are commonly numbered.

Notable

• HKDNR handles the day-to-day registration service; HKIRC is the registry proper. The AS sits with the registrar entity, but the infrastructure serves the .hk namespace as a whole.
• Four IPv6 /36s against two IPv4 /24s is an unusually IPv6-heavy allocation, consistent with an organisation that runs authoritative DNS and wants generous, well-separated anycast-capable space.
• A single BGP neighbour is a genuinely small routing posture for critical national infrastructure; the resilience for .hk comes from DNS-layer distribution rather than from this AS's own peering breadth.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 203.119.2.0/24
• 203.119.87.0/24
• 2001:dca:1000::/36
• 2001:dca:2000::/35
• 2001:dca:4000::/36

Upstream networks

• AS19551 Incapsula Inc

Adjacent networks

• AS19551 Incapsula Inc

Routing security

• RPKI: 0 valid, 0 invalid and 6 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 13 route objects.
• Listed in as-sets: AS-133777-TRANSIT, AS-ANC-CUSTOMER-PROXY-REGISTER, AS-CTI-TELECOM, AS-HGC-INTL, AS-HKBN-TRANSIT, AS-HKNET, AS-HKT-AS4515, AS-HURRICANE, AS-HURRICANEV6, AS-HUTCHCITY, AS-INCAPSULA, AS-INCAPSULA, AS-KDD, AS-KDDI6, AS-KORNETBGP, AS-LINKAGE, AS-PACNET-CUSTOMER-PROXY-REGISTER, AS-TELSTRA-INTL-CUSTOMERS, AS-TELSTRA-INTL-CUSTOMERS-4637, AS-XO-B, AS198949:AS-SD, AS3491:AS-CUSTOMERS-AP, AS4826:AS-CUSTOMERS, AS58453:AS-ASIAASCUST, AS58453:AS-ASIAASCUST.