00:21:81 Si2 Microsystems Limited
Every MAC address from 00:21:81:00:00:00 to 00:21:81:FF:FF:FF belongs to a block the IEEE assigned to Si2 Microsystems Limited. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:21:81 belongs to
Written 00:21:81, 00-21-81 or 002181, depending on the system. Look up a full address.
Prefix
00:21:81
Organization
Si2 Microsystems Limited
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:21:81:00:00:00
Last address
00:21:81:FF:FF:FF
Address type
Globally unique, unicast
Registered address
No 84, Sy No 150, EPIP, Whitefield Industrial Area Bangalore Karnataka IN 560066