- Prefix
- 00:1B:91 00-1B-91 001B.91
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 00:1B:91:00:00:00 – 00:1B:91:FF:FF:FF
- Organization
- EFKON AG
- Registered address
- Dietrich-Keller-Strasse 20, 8074 Raaba, AT
- Country
- Austria (AT)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 00:1B:91:00:00:00
EFKON AG holds 1 block in total: see all. Source: IEEE Registration Authority public listing.