Address space
AS37918 ECL-INET Nippon Telegraph and Telephone Corporation
IPv4 prefixes
10
69.38K addresses
IPv6 prefixes
1
Most common size
/24
IPv4
Flagged
5
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 | 11 |
Review
Flagged prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 192.68.248.0/28 | IPv4 | 16 | JP | Too specific |
| 192.68.248.16/28 | IPv4 | 16 | JP | Too specific |
| 192.68.248.32/27 | IPv4 | 32 | JP | Too specific |
| 192.68.248.64/26 | IPv4 | 64 | JP | Too specific |
| 192.68.248.128/25 | 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
All prefixes
| Prefix | Family | Addresses | Country | Flags |
|---|---|---|---|---|
| 129.60.0.0/16 | IPv4 | 65,536 | JP | |
| 192.68.235.0/24 | IPv4 | 256 | JP | |
| 192.68.236.0/22 | IPv4 | 1,024 | JP | |
| 192.68.240.0/21 | IPv4 | 2,048 | JP | |
| 192.68.248.0/28 | IPv4 | 16 | JP | Too specific |
| 192.68.248.16/28 | IPv4 | 16 | JP | Too specific |
| 192.68.248.32/27 | IPv4 | 32 | JP | Too specific |
| 192.68.248.64/26 | IPv4 | 64 | JP | Too specific |
| 192.68.248.128/25 | IPv4 | 128 | JP | Too specific |
| 192.68.249.0/24 | IPv4 | 256 | JP | |
| 2001:df0:45::/48 | IPv6 | — | JP |