- Prefix
- 04:19:7F 04-19-7F 0419.7F
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 04:19:7F:00:00:00 – 04:19:7F:FF:FF:FF
- Organization
- Grasphere Japan
- Registered address
- 3-1-11 NNT build., Tokyo 1030013, JP
- Country
- Japan (JP)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 04:19:7F:00:00:00
Grasphere Japan holds 1 block in total: see all. Source: IEEE Registration Authority public listing.