AS3661
The Chinese University of Hong Kong — cuhk.edu.hk
Summary
| Country |
 Hong Kong
|
| Organization | The Chinese University of Hong Kong |
| Domain | cuhk.edu.hk |
| Number of IPv4 | 81,408 |
| Number of IPv6 | 7.9229× 1028 |
| AS Type | Education |
| Registry | APNIC |
| Allocated | July 31, 2002 (about 23 years ago) |
| Updated | December 05, 2022 (about 2 years ago) |
IP Ranges
AS3661 announces 12 IPv4 ranges and 2 IPv6 ranges.
That's a total of 81,408 IPv4 addresses and 7.9229× 1028 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 43.230.116.0/22 |
The Chinese University of Hong Kong
|
1,024 | APNIC | ALLOCATED PORTABLE |
| 43.252.200.0/22 |
The Chinese University of Hong Kong
|
1,024 | APNIC | ASSIGNED PORTABLE |
| 103.29.12.0/22 |
The Chinese University of Hong Kong
|
1,024 | APNIC | ALLOCATED PORTABLE |
| 103.49.160.0/22 |
The Chinese University of Hong Kong
|
1,024 | APNIC | ALLOCATED PORTABLE |
| 123.255.64.0/21 |
The Chinese University of Hong Kong
|
2,048 | APNIC | ALLOCATED PORTABLE |
| 123.255.72.0/21 |
The Chinese University of Hong Kong
|
2,048 | APNIC | ALLOCATED PORTABLE |
| 123.255.80.0/21 |
The Chinese University of Hong Kong
|
2,048 | APNIC | ALLOCATED PORTABLE |
| 137.189.0.0/16 |
The Chinese University of Hong Kong
|
65,536 | APNIC | ALLOCATED PORTABLE |
| 137.189.196.0/24 |
The Chinese University of Hong Kong
|
256 | APNIC | ALLOCATED PORTABLE |
| 175.159.224.0/22 |
The Chinese University of Hong Kong
|
1,024 | APNIC | ASSIGNED NON-PORTABLE |
| 202.40.216.0/24 |
Cuhk Library
|
256 | APNIC | ASSIGNED NON-PORTABLE |
| 203.188.64.0/20 |
The Chinese University of Hong Kong
|
4,096 | APNIC | ASSIGNED NON-PORTABLE |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2001:ce0:3::/48 |
Joint Universities Computer Centre Limited
|
1.2089× 1024 | APNIC | ALLOCATED PORTABLE |
| 2405:3000::/32 |
The Chinese University of Hong Kong
|
7.9228× 1028 | APNIC | ALLOCATED PORTABLE |
Peers
AS3661 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.
Upstreams
AS3661 connects to the global Internet via at least 3 upstream providers. In this setup, AS3661 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS3661 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.