MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
OPTEC DAIICHI DENKO CO., LTD.
OUI prefix: 00:40:39
Vendor name: OPTEC DAIICHI DENKO CO., LTD.
FIBER OPTICS & TELECOM. DIV.
Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)
Last updated: 17 November 2015
Initial registration: 22 April 1998