8C:1F:64:5F:5 HongSeok Ltd.
Every MAC address from 8C:1F:64:5F:50:00 to 8C:1F:64:5F:5F:FF belongs to a block the IEEE assigned to HongSeok Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 8C:1F:64:5F:5 belongs to
Written 8C:1F:64:5F:5, 8C-1F-64-5F-5 or 8C1F645F5, depending on the system. Look up a full address.
Prefix
8C:1F:64:5F:5/36
Organization
HongSeok Ltd.
Registry
MA-S (36 bits)
Addresses
4,096
First address
8C:1F:64:5F:50:00
Last address
8C:1F:64:5F:5F:FF
Address type
Globally unique, unicast
Registered address
166, Osan-ro, Osan-myeon Iksan-si Jeollabuk-do KR 54670
Parent block
Inside 8C:1F:64
This MA-S block is carved from the 24-bit block 8C:1F:64, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.
Same organization
Other blocks assigned to HongSeok Ltd.
2 more blocks registered under the same name.