Address space
AS4158 CITYUNI-AS-AP City University of Hong Kong
IPv4 prefixes
9
82.98K addresses
IPv6 prefixes
1
Most common size
/21
IPv4
Flagged
1
Shape
Prefix sizes
How this network carves its IPv4 space. A wall of /24s usually means many small customer assignments or fine-grained traffic engineering; a few short prefixes means large contiguous allocations announced whole.
Shape
Prefix sizes
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| HK | Hong Kong | 10 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 203.188.112.128/27 | IPv4 | 32 | HK | Too specific |
A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.
Inventory
All prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 144.214.0.0/16 | IPv4 | 65,536 | HK | |
| 175.159.64.0/19 | IPv4 | 8,192 | HK | |
| 175.159.200.0/21 | IPv4 | 2,048 | HK | |
| 175.159.208.0/22 | IPv4 | 1,024 | HK | |
| 202.125.216.0/21 | IPv4 | 2,048 | HK | |
| 202.125.252.0/22 | IPv4 | 1,024 | HK | |
| 203.188.80.0/21 | IPv4 | 2,048 | HK | |
| 203.188.88.0/22 | IPv4 | 1,024 | HK | |
| 203.188.112.128/27 | IPv4 | 32 | HK | Too specific |
| 2001:ce0:5::/48 | IPv6 | — | HK |