[{"mac_prefix":"28:69:26","mask_bits":24,"block_type":"MA-L","organization":"OPTOKON, a.s.","address":"Červený Kříž 250 Jihlava  CZ 586 01","country":"CZ"},{"mac_prefix":"8C:1F:64:BC:A0","mask_bits":36,"block_type":"MA-S","organization":"OPTOKON, a.s.","address":"Červený Kříž 250 Jihlava  CZ 586 01","country":"CZ"}]