Address space
AS3488 JAXANET Information Systems Department, Japan Aerospace Exploration Agency
IPv4 prefixes
51
115K addresses
IPv6 prefixes
0
Most common size
/24
IPv4
Flagged
17
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 | 51 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 133.56.13.0/25 | IPv4 | 128 | JP | Too specific |
| 133.56.13.128/29 | IPv4 | 8 | JP | Too specific |
| 133.56.13.136/31 | IPv4 | 2 | JP | Too specific |
| 133.56.13.138/32 | IPv4 | 1 | JP | Too specific |
| 133.56.13.139/32 | IPv4 | 1 | JP | Too specific |
| 133.56.13.140/30 | IPv4 | 4 | JP | Too specific |
| 133.56.13.144/28 | IPv4 | 16 | JP | Too specific |
| 133.56.13.160/27 | IPv4 | 32 | JP | Too specific |
| 133.56.13.192/26 | IPv4 | 64 | JP | Too specific |
| 133.74.120.0/26 | IPv4 | 64 | JP | Too specific |
| 133.74.120.64/31 | IPv4 | 2 | JP | Too specific |
| 133.74.120.66/31 | IPv4 | 2 | JP | Too specific |
| 133.74.120.68/30 | IPv4 | 4 | JP | Too specific |
| 133.74.120.72/29 | IPv4 | 8 | JP | Too specific |
| 133.74.120.80/28 | IPv4 | 16 | JP | Too specific |
| 133.74.120.96/27 | IPv4 | 32 | JP | Too specific |
| 133.74.120.128/25 | IPv4 | 128 | JP | Too specific |
A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.
Inventory