Address space
AS5739 UCSC
IPv4 prefixes
4
131K addresses
IPv6 prefixes
3
Most common size
/16
IPv4
Flagged
4
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 | 7 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 137.164.3.48/31 | IPv4 | 2 | US | Too specific |
| 137.164.23.182/31 | IPv4 | 2 | US | Too specific |
| 2607:f380::118:9a40:3300/123 | IPv6 | — | US | Too specific |
| 2607:f380:1::118:9a41:7b60/123 | IPv6 | — | 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 |
|---|---|---|---|---|
| 128.114.0.0/16 | IPv4 | 65,536 | US | |
| 137.164.3.48/31 | IPv4 | 2 | US | Too specific |
| 137.164.23.182/31 | IPv4 | 2 | US | Too specific |
| 169.233.0.0/16 | IPv4 | 65,536 | US | |
| 2607:f380::118:9a40:3300/123 | IPv6 | — | US | Too specific |
| 2607:f380:1::118:9a41:7b60/123 | IPv6 | — | US | Too specific |
| 2607:f5f0::/32 | IPv6 | — | US |