- Prefix
- E4:12:89 E4-12-89 E412.89
- Block type
- MA-L (16,777,216 addresses)
- Address range
- E4:12:89:00:00:00 – E4:12:89:FF:FF:FF
- Organization
- topsystem GmbH
- Registered address
- Krefelder Straße 201, Aachen 52070, DE
- Country
- Germany (DE)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up E4:12:89:00:00:00
topsystem GmbH holds 1 block in total: see all. Source: IEEE Registration Authority public listing.