00:40:39 OPTEC DAIICHI DENKO CO., LTD.
Every MAC address from 00:40:39:00:00:00 to 00:40:39:FF:FF:FF belongs to a block the IEEE assigned to OPTEC DAIICHI DENKO CO., LTD.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:40:39 belongs to
Written 00:40:39, 00-40-39 or 004039, depending on the system. Look up a full address.
Prefix
00:40:39
Organization
OPTEC DAIICHI DENKO CO., LTD.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:40:39:00:00:00
Last address
00:40:39:FF:FF:FF
Address type
Globally unique, unicast
Registered address
FIBER OPTICS & TELECOM. DIV. JAPAN