Filtering pokitMeter device by BLE address using OUI (Organizationally Unique Identifier)

I am developing a windows app for pokitmeter and I want to distinguish the pokitmeter from other BLE devices. This can be done by parsing OUI in the BLE address, some literature says it's the first 3 bytes and some others it's the first 4 bytes.

If my pokitmeter's BLE address is 00:0D:6F:XX:XX:XX, the OUI is "00:0D:6F"? or "00:0D:6F:XX"?

Can someone please help me confirm that the OUI of pokitmeters is "00:0D:6F".

Thank you very much in advance!

-jdon