Address space
AS37917 UTINS University of Tsukuba
IPv4 prefixes
3
132K addresses
IPv6 prefixes
0
Most common size
/16
IPv4
Flagged
0
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.
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 3 |
Inventory
All prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 130.158.0.0/16 | IPv4 | 65,536 | JP | |
| 133.51.0.0/16 | IPv4 | 65,536 | JP | |
| 163.220.252.0/22 | IPv4 | 1,024 | JP |