- Prefix
- D4:39:B8 D4-39-B8 D439.B8
- Block type
- MA-L (16,777,216 addresses)
- Address range
- D4:39:B8:00:00:00 – D4:39:B8:FF:FF:FF
- Organization
- Ciena Corporation
- Registered address
- 7035 Ridge Road, Hanover MD 21076, US
- Country
- United States (US)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up D4:39:B8:00:00:00
Ciena Corporation holds 24 blocks in total: see all. Source: IEEE Registration Authority public listing.