30:C9:1B Zhen Shi Information Technology（Shanghai）Co.,Ltd.
Every MAC address from 30:C9:1B:00:00:00 to 30:C9:1B:FF:FF:FF belongs to a block the IEEE assigned to Zhen Shi Information Technology（Shanghai）Co.,Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 30:C9:1B belongs to
Written 30:C9:1B, 30-C9-1B or 30C91B, depending on the system. Look up a full address.
Prefix
30:C9:1B
Organization
Zhen Shi Information Technology（Shanghai）Co.,Ltd.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
30:C9:1B:00:00:00
Last address
30:C9:1B:FF:FF:FF
Address type
Globally unique, unicast
Registered address
5F, Building 3?No. 401 Caobao Road, Xuhui District, Shanghai, ChinaShanghai Shanghai CN 200233