B0:1F:81:A Steffens Systems GmbH
Every MAC address from B0:1F:81:A0:00:00 to B0:1F:81:AF:FF:FF belongs to a block the IEEE assigned to Steffens Systems GmbH. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B0:1F:81:A belongs to
Written B0:1F:81:A, B0-1F-81-A or B01F81A, depending on the system. Look up a full address.
Prefix
B0:1F:81:A/28
Organization
Steffens Systems GmbH
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
B0:1F:81:A0:00:00
Last address
B0:1F:81:AF:FF:FF
Address type
Globally unique, unicast
Registered address
Mathias-Brüggenstr. 83 Cologne NRW DE 50829
Parent block
Inside B0:1F:81
This MA-M block is carved from the 24-bit block B0:1F:81, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.