[{"mac_prefix":"00:50:C2:3A:70","mask_bits":36,"block_type":"IAB","organization":"Elektrotechnik \u0026 Elektronik Oltmann GmbH","address":"Gartenfelder Str. 29 Berlin  DE D-13599","country":"DE"},{"mac_prefix":"8C:1F:64:AD:00","mask_bits":36,"block_type":"MA-S","organization":"Elektrotechnik \u0026 Elektronik Oltmann GmbH","address":"Gartenfelder Str. 29 Berlin  DE D-13599","country":"DE"},{"mac_prefix":"8C:1F:64:FC:A0","mask_bits":36,"block_type":"MA-S","organization":"Elektrotechnik \u0026 Elektronik Oltmann GmbH","address":"Gartenfelder Str. 29 Berlin  DE D-13599","country":"DE"}]