Depends on the circuit that you are dialling out onto. I know where I work there are some rules about presenting whatever number you want on our trunk provider

Depends on the circuit that you are dialling out onto. I know where I work there are some rules about presenting whatever number you want on our trunk provider, but this is something they have put in place themselves with no "legal" reason for them to do it. We've been working with them for years so we are one of their trusted clients and have the ability to present any number we want as long as we have permission to do so from the number owner. The fact its up to the trunk provider to put these rules in place and not just standard everywhere is wild to me.