[{"mac_prefix":"84:B3:86:60","mask_bits":28,"block_type":"MA-M","organization":"ALPHA Corporation","address":"Product Development Department, Housing Hardware Devision Yokohama Kanagawa JP 236-0004","country":"JP"},{"mac_prefix":"00:50:C2:D6:C0","mask_bits":36,"block_type":"IAB","organization":"ALPHA Corporation","address":"Product Development Department, Housing Hardware Devision Yokohama Kanagawa JP 236-0004","country":"JP"},{"mac_prefix":"70:B3:D5:D6:70","mask_bits":36,"block_type":"MA-S","organization":"ALPHA　Corporation","address":"1-6-8 Fukuura,  Yokohama City, Kanazawa-ku,  Kanagawa JP 236-0004","country":"JP"},{"mac_prefix":"8C:1F:64:8E:20","mask_bits":36,"block_type":"MA-S","organization":"ALPHA Corporation","address":"Product Development Department, Housing Hardware Devision Yokohama Kanagawa JP 236-0004","country":"JP"}]