B4:1D:EF Internet Laboratories, Inc.
Every MAC address from B4:1D:EF:00:00:00 to B4:1D:EF:FF:FF:FF belongs to a block the IEEE assigned to Internet Laboratories, Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who B4:1D:EF belongs to
Written B4:1D:EF, B4-1D-EF or B41DEF, depending on the system. Look up a full address.
Prefix
B4:1D:EF
Organization
Internet Laboratories, Inc.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
B4:1D:EF:00:00:00
Last address
B4:1D:EF:FF:FF:FF
Address type
Globally unique, unicast
Registered address
P.O. Box 7697 Atlanta GA US 30357