00:04:B1 Signal Technology, Inc.
Every MAC address from 00:04:B1:00:00:00 to 00:04:B1:FF:FF:FF belongs to a block the IEEE assigned to Signal Technology, Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:04:B1 belongs to
Written 00:04:B1, 00-04-B1 or 0004B1, depending on the system. Look up a full address.
Prefix
00:04:B1
Organization
Signal Technology, Inc.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:04:B1:00:00:00
Last address
00:04:B1:FF:FF:FF
Address type
Globally unique, unicast
Registered address
3rd. Fl. Dabo Bldg. Seoul KOREA KR 138-110