00:21:4D Guangzhou Skytone Transmission Technology Com. Ltd.
Every MAC address from 00:21:4D:00:00:00 to 00:21:4D:FF:FF:FF belongs to a block the IEEE assigned to Guangzhou Skytone Transmission Technology Com. Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:21:4D belongs to
Written 00:21:4D, 00-21-4D or 00214D, depending on the system. Look up a full address.
Prefix
00:21:4D
Organization
Guangzhou Skytone Transmission Technology Com. Ltd.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:21:4D:00:00:00
Last address
00:21:4D:FF:FF:FF
Address type
Globally unique, unicast
Registered address
3/F West, Block 4, Huangzhou Guangzhou Guangdong CN 510660