Address space
AS38 UIUC
IPv4 prefixes
16
211K addresses
IPv6 prefixes
2
Most common size
/16
IPv4
Flagged
3
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 | 18 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 72.36.97.0/26 | IPv4 | 64 | US | Too specific |
| 72.36.97.64/26 | IPv4 | 64 | US | Too specific |
| 72.36.97.128/25 | 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 |
|---|---|---|---|---|
| 72.36.64.0/20 | IPv4 | 4,096 | US | |
| 72.36.80.0/23 | IPv4 | 512 | US | |
| 72.36.82.0/23 | IPv4 | 512 | US | |
| 72.36.84.0/22 | IPv4 | 1,024 | US | |
| 72.36.88.0/21 | IPv4 | 2,048 | US | |
| 72.36.96.0/24 | IPv4 | 256 | US | |
| 72.36.97.0/26 | IPv4 | 64 | US | Too specific |
| 72.36.97.64/26 | IPv4 | 64 | US | Too specific |
| 72.36.97.128/25 | IPv4 | 128 | US | Too specific |
| 72.36.98.0/23 | IPv4 | 512 | US | |
| 72.36.100.0/22 | IPv4 | 1,024 | US | |
| 72.36.104.0/21 | IPv4 | 2,048 | US | |
| 72.36.112.0/21 | IPv4 | 2,048 | US | |
| 128.174.0.0/16 | IPv4 | 65,536 | US | |
| 130.126.0.0/16 | IPv4 | 65,536 | US | |
| 192.17.0.0/16 | IPv4 | 65,536 | US | |
| 2600:3900::/28 | IPv6 | — | US | |
| 2620:0:e00::/47 | IPv6 | — | US |