You can specify the number you want to appear to be coming from when terminating a SIP connection, depending on where you're connecting to the network.
Edit: Ah, after reading more from that link you provided; the issue is stuck in your dysfunctional government.
I'm so confused right now.
Does the US not have a central agency that allocates phone numbers and operators? Does that agency not have the ability to shutdown operators who don't follow the rules?
You've broken the HN guidelines an extraordinary number of times in the past, and we cut you an extraordinary amount of slack. But the flamewars you've propagated over the last few days are serious vandalism on HN. I'm frankly shocked that you would continue to do that much damage here after we discussed this so many times.
Since giving you many benefits of the doubt has failed to persuade you to use this site as intended, I've banned your account.
Ah, well, Jingoism is an american word. I guess I just thougt the crowd here could agree that it's retarded to not have a political policy against fake VOIP numbers.