Druglord
When given a DEFO position to NA or Europe, you are given a domicile (ie LAX FRA LHR) you can then ask for an HK roster and all your flights begin and end there. All your pay and benefits are based on your domicile and you usually fly HKG ANC. You can end up flying to Europe, regional or beyond ANC in NA, but it seems like the majority is to ANC.