Address space
AS59 WISC-MADISON-AS
IPv4 prefixes
33
331K addresses
IPv6 prefixes
1
Most common size
/24
IPv4
Flagged
6
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 |
|---|---|---|
| US | United States of America | 34 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 144.92.233.0/26 | IPv4 | 64 | US | Too specific |
| 144.92.233.64/27 | IPv4 | 32 | US | Too specific |
| 144.92.233.96/28 | IPv4 | 16 | US | Too specific |
| 144.92.233.112/30 | IPv4 | 4 | US | Too specific |
| 144.92.233.120/29 | IPv4 | 8 | US | Too specific |
| 144.92.233.128/25 | IPv4 | 128 | US | 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 |
|---|---|---|---|---|
| 72.33.0.0/16 | IPv4 | 65,536 | US | |
| 128.104.0.0/16 | IPv4 | 65,536 | US | |
| 128.105.0.0/18 | IPv4 | 16,384 | US | |
| 128.105.64.0/22 | IPv4 | 1,024 | US | |
| 128.105.68.0/23 | IPv4 | 512 | US | |
| 128.105.70.0/23 | IPv4 | 512 | US | |
| 128.105.72.0/21 | IPv4 | 2,048 | US | |
| 128.105.80.0/20 | IPv4 | 4,096 | US | |
| 128.105.96.0/19 | IPv4 | 8,192 | US | |
| 128.105.128.0/17 | IPv4 | 32,768 | US | |
| 144.92.0.0/17 | IPv4 | 32,768 | US | |
| 144.92.128.0/18 | IPv4 | 16,384 | US | |
| 144.92.192.0/19 | IPv4 | 8,192 | US | |
| 144.92.224.0/21 | IPv4 | 2,048 | US | |
| 144.92.232.0/24 | IPv4 | 256 | US | |
| 144.92.233.0/26 | IPv4 | 64 | US | Too specific |
| 144.92.233.64/27 | IPv4 | 32 | US | Too specific |
| 144.92.233.96/28 | IPv4 | 16 | US | Too specific |
| 144.92.233.112/30 | IPv4 | 4 | US | Too specific |
| 144.92.233.120/29 | IPv4 | 8 | US | Too specific |
| 144.92.233.128/25 | IPv4 | 128 | US | Too specific |
| 144.92.234.0/23 | IPv4 | 512 | US | |
| 144.92.236.0/22 | IPv4 | 1,024 | US | |
| 144.92.240.0/20 | IPv4 | 4,096 | US | |
| 146.151.0.0/16 | IPv4 | 65,536 | US | |
| 192.12.220.0/24 | IPv4 | 256 | US | |
| 192.12.223.0/24 | IPv4 | 256 | US | |
| 192.12.224.0/24 | IPv4 | 256 | US | |
| 192.86.79.0/24 | IPv4 | 256 | US | |
| 198.51.246.0/23 | IPv4 | 512 | US | |
| 198.51.254.0/24 | IPv4 | 256 | US | |
| 198.133.224.0/23 | IPv4 | 512 | US | |
| 205.213.248.0/22 | IPv4 | 1,024 | US | |
| 2607:f388::/32 | IPv6 | — | US |