Address space
AS131 UCSB-NET-AS
Unclassified ARIN
IPv4 prefixes
7
132K addresses
IPv6 prefixes
3
Most common size
/16
IPv4
Flagged
4
Shape
IPv4 prefix sizes
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
IPv6 prefix sizes
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 10 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 137.164.23.8/31 | IPv4 | 2 | US | Too specific |
| 137.164.23.90/31 | IPv4 | 2 | US | Too specific |
| 2607:f380:1::118:9a41:7080/123 | IPv6 | /123 | US | Too specific |
| 2607:f380:1::118:9a41:75a0/123 | IPv6 | /123 | US | Too specific |
A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.