Address space
AS131158 NAIST-AS Nara Institute of Science and Technology, National University Corporation
IPv4 prefixes
2
66.05K addresses
IPv6 prefixes
1
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.
Shape
Prefix sizes
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 3 |
Inventory
All prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 163.221.0.0/16 | IPv4 | 65,536 | JP | |
| 192.218.128.0/23 | IPv4 | 512 | JP | |
| 2001:df3:540::/48 | IPv6 | — | JP |