Address space
AS32 STANFORD
IPv4 prefixes
17
330K addresses
IPv6 prefixes
2
Most common size
/16
IPv4
Flagged
5
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 | 19 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 171.67.232.0/25 | IPv4 | 128 | US | Too specific |
| 171.67.232.128/27 | IPv4 | 32 | US | Too specific |
| 171.67.232.160/28 | IPv4 | 16 | US | Too specific |
| 171.67.232.176/28 | IPv4 | 16 | US | Too specific |
| 171.67.232.192/26 | IPv4 | 64 | 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 |
|---|---|---|---|---|
| 128.12.0.0/16 | IPv4 | 65,536 | US | |
| 171.64.0.0/15 | IPv4 | 131,072 | US | |
| 171.66.0.0/16 | IPv4 | 65,536 | US | |
| 171.67.0.0/17 | IPv4 | 32,768 | US | |
| 171.67.128.0/18 | IPv4 | 16,384 | US | |
| 171.67.192.0/19 | IPv4 | 8,192 | US | |
| 171.67.224.0/21 | IPv4 | 2,048 | US | |
| 171.67.232.0/25 | IPv4 | 128 | US | Too specific |
| 171.67.232.128/27 | IPv4 | 32 | US | Too specific |
| 171.67.232.160/28 | IPv4 | 16 | US | Too specific |
| 171.67.232.176/28 | IPv4 | 16 | US | Too specific |
| 171.67.232.192/26 | IPv4 | 64 | US | Too specific |
| 171.67.233.0/24 | IPv4 | 256 | US | |
| 171.67.234.0/23 | IPv4 | 512 | US | |
| 171.67.236.0/22 | IPv4 | 1,024 | US | |
| 171.67.240.0/20 | IPv4 | 4,096 | US | |
| 204.63.224.0/21 | IPv4 | 2,048 | US | |
| 2607:f6d0::/32 | IPv6 | — | US | |
| 2620:6c:40c0::/48 | IPv6 | — | US |