MAC Address Lookup

Find the vendor name of a device by entering an OUI or a MAC address


EmFirst Co., Ltd.

MAC prefix: 8C:33:30

Vendor name: EmFirst Co., Ltd.

MAC range: 8C:33:30:00:00:00 - 8C:33:30:FF:FF:FF

Block Size: 16777215 (16.77 M)


701 Suwon Venture Center
Suwon Gyeonggi-do 442-833

Type MA-L

Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million)

Initial registration: 05 October 2012

Last updated: 17 November 2015

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