NW has NRT/GUM, NRT/SPN daily.
CO Micronesia does NRT/GUM 3 daily.

NW flies NRT/HNL 2 daily,KIX/HNL daily.
CO no longer flies NRT/HNL, but has GUM/HNL route.

CO has frequent GUM/SPN jet service.
NW airlink flies GUM/ROP/SPN frequently.

None of above code-Shared.
But Why?