Address space
AS4721 JCN JCOM Co., Ltd.
Residential ARIN
IPv4 prefixes
54
632K addresses
IPv6 prefixes
1
Most common size
/20
IPv4
Flagged
0
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
Geography
Where the space lands
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 55 |