AS3661The Chinese University of Hong Kong
Hong Kong SAR ChinaRegistryAPNICAt a glance
IPv4 prefixes
7
IPv6 prefixes
2
IPv4 addresses
74.2k
IPv6 /64s
4.3B
Upstream graph
The networks AS3661 is seen behind, one and two hops out, drawn from real AS paths.
AS3661Toward the internet core
Networks observed one and two hops upstream of AS3661 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
29
adjacent networks
- Upstreams
- 1034%
- Peers
- 1966%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS3662Joint Universities Computer Centre Limited | HK | Peer | 480 | 82 |
| AS6939Hurricane Electric LLC |  US | Peer | 119 | 55 |
| AS137207Joint Universities Computer Centre Limited | HK | Peer | 18 | 3 |
| AS7713PT Telkom Indonesia Tbk |  ID | Peer | 14 | 4 |
| AS4641The Hong Kong Internet Exchange Limited | HK | Peer | 11 | 4 |
| AS18106Viewqwest Pte Ltd |  SG | Peer | 10 | 2 |
| AS49544i3D.net B.V |  NL | Peer | 7 | 2 |
| AS24482SG.GS | SG | Peer | 7 | 2 |
| AS4635HKIX Route Servers | HK | Peer | 5 | 1 |
| AS132337Axclusive | SG | Peer | 5 | 1 |
Prefixes
The largest blocks AS3661 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 137.189.0.0/16 | 65.5k | 79/80 |
| 203.188.64.0/20 | 4.1k | 79/80 |
| 123.255.64.0/21 | 2k | 79/80 |
| 103.49.160.0/22 | 1k | 79/80 |
| 175.159.224.0/22 | 1k | 79/80 |
| 137.189.196.0/24 | 256 | 80/80 |
| 202.40.216.0/24 | 256 | 79/80 |
| 2405:3000::/32 | 4.3B × /64 | 61/62 |
| 2001:ce0:3::/48 | 65.5k × /64 | 61/62 |
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.