Find the vendor name of a device by entering an OUI or a MAC address
IEEE 802.1 Working Group
IEEE 802.1 Working Group , manages 6 unique MAC address prefixes. These prefixes have a total block size of 100.7 million addresses.
The allocation includes the following types: CID(Company Identifier, not for globally unique applications) and MA-L(Mac Address Block Large, 16,777,216 addresses each).
The company registered its MAC address allocation on 22 April 1998, and the most recent update was made on 21 September 2026. These allocations support network identification and communication globally.
Unique prefixes: 6
Block Size: 100663290 (100.66 M)
First registration: 22 April 1998
Last updated: 21 September 2026
CID:Company Identifier. This prefix will not be used for globally unique applications. Number of address 2^24 (~16 Million)
MA-L:Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)