MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
MAC address prefix F4:B8:21 is registered to Cisco Systems, Inc, located at 80 West Tasman DriveSan Jose CA 94568US.
This registration is classified as MA-L (Mac Address Block Large) containing 16,777,216 MAC addresses (2^24)
The prefix was registered on 24 March 2026, and no subsequent updates have been recorded.
OUI: F4:B8:21
Vendor name: Cisco Systems, Inc
Address:
Assignment Type MA-L 80 West Tasman Drive
San Jose CA 94568
US.
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Initial registration: 24 March 2026
