MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
Chelsio Communications Inc
MAC address prefix 20:B3:7F:0 is registered to Chelsio Communications Inc, located at 735N Pastoria AvSUNNYVALE CA 94085US.
This registration is classified as MA-M (Mac Address Block Medium) containing approximately 16 million MAC addresses
The prefix was registered on 16 March 2026, and no subsequent updates have been recorded.
OUI: 20:B3:7F:0
Vendor name: Chelsio Communications Inc
Address:
Assignment Type MA-M 735
N Pastoria Av
SUNNYVALE CA 94085
US.
Mac Address Block Medium. Number of address 2^20 (~1 Million)
Initial registration: 16 March 2026
