AS4641 The Chinese University of Hong Kong
AS4641 is operated by The Chinese University of Hong Kong and registered with APNIC (HK) since 1995-11-24.
It announces 3 IPv4 and 1 IPv6 prefixes, 0% of them RPKI valid.
RIPE RIS sees 7 upstream and peer networks and 3 downstream networks next to it.
PeeringDB lists it as an Educational/Research network at 1 internet exchange. Its peering policy is selective.
| Name | The Chinese University of Hong Kong |
|---|---|
| Registry handle | HKIX-AS-AP |
| Registry (RIR) | APNIC |
| Country | Hong Kong SAR China (HK) |
| Delegated on | 1995-11-24 |
| Network type | Educational/Research, Asia Pacific |
| Peering policy | Selective |
| IRR as-set | APNIC::AS4641:AS-CUHK-TRANSIT |
| Prefixes (IPv4 / IPv6) | 3 / 1 |
| RPKI valid | 0% (0 / 4) |
| Upstreams and peers | 7 |
| Downstream networks | 3 |
| Website | cuhk.edu.hk |
Routing health
- AS4641 announces 3 IPv4 and 1 IPv6 prefixes.
- 4 announced prefixes are not covered by a ROA of AS4641 (they may have none, or another network’s).
- 7 upstreams and peers, 3 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 4
- 123.255.96.0/19
- 202.45.176.0/20
- 202.45.177.0/24
- 2405:3001::/32
Upstreams and peers 7
The networks RIPE RIS sees next to AS4641 in BGP paths, the most visible first.
Peering
Peering policy: Selective. Suggested max-prefix limits: 10 IPv4, 1 IPv6. PeeringDB record
| Exchange | Ports | Speed | Route server |
|---|---|---|---|
| HKIX: HKIX Peering LAN | 2 | 20G | Yes |
More about AS4641
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-15 22:14 UTC. The country is where the AS number was registered, not necessarily where the network operates.