sba55
En-Route
Once you have the caller ID, it shouldn't be too hard to find out who that number belongs to. If the free reverse lookup services don't turn up anything, I'm sure you could find it with a company like Intelius in a few minutes.If they wouldn't hang up the moment you start asking for their company name and address, then I would. They know they're violating the law, so the moment you bring anything like that up, they release the call.
And the caller ID referenced a residential phone number in New Hampshire that's always busy.
After that, I would guess you're good to go. If they're faking their caller ID (which they probably aren't), then I'm sure there's a way to sue to number and get their name during discovery. I doubt you'd have to do that, though.....
-Felix