B4:37:D1:2 Fibersystem AB
Every MAC address from B4:37:D1:20:00:00 to B4:37:D1:2F:FF:FF belongs to a block the IEEE assigned to Fibersystem AB. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B4:37:D1:2 belongs to
Written B4:37:D1:2, B4-37-D1-2 or B437D12, depending on the system. Look up a full address.
Prefix
B4:37:D1:2/28
Organization
Fibersystem AB
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
B4:37:D1:20:00:00
Last address
B4:37:D1:2F:FF:FF
Address type
Globally unique, unicast
Registered address
Gårdsfogdevägen 18B Bormma Stockholm SE 16866
Parent block
Inside B4:37:D1
This MA-M block is carved from the 24-bit block B4:37:D1, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.