Address space
AS45688 UT-NSRG The University of Tokyo Interfaculty Initiative in Information Studies
Unclassified RIPE
IPv4 prefixes
5
3.59K addresses
IPv6 prefixes
0
Most common size
/24
IPv4
Flagged
1
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
This network announces no IPv6 we can see.
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 5 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 133.69.167.248/29 | IPv4 | 8 | JP | Too specific |
A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.