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Vendor details - OPTiM Corporation


OPTiM Corporation
1 Honjo-machi
Saga    840-8502
 JP

OUI block range
D4:7C:44:B MA-M D4:7C:44:B0:00:00 - D4:7C:44:BF:FF:FF

https://uic.io/en/mac/vendor/optim_corporation/