B4:37:D1:B NSI Co., Ltd.
Every MAC address from B4:37:D1:B0:00:00 to B4:37:D1:BF:FF:FF belongs to a block the IEEE assigned to NSI Co., Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B4:37:D1:B belongs to
Written B4:37:D1:B, B4-37-D1-B or B437D1B, depending on the system. Look up a full address.
Prefix
B4:37:D1:B/28
Organization
NSI Co., Ltd.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
B4:37:D1:B0:00:00
Last address
B4:37:D1:BF:FF:FF
Address type
Globally unique, unicast
Registered address
3F, No.33-1, Lane235, Sung-Chiang Road Taipei TW 10483
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.