OK, but since it is *that* number and it is being used to make threatening phone calls as a part of an advance fee fraud scam WTF can't inActionFraud get off their arses and do something about it?
The number (and a zillion very like it) have been around for long enough to have a significant footprint as nuisance callers on the web.
It must work sometimes or they would not be doing it.
OP might like to forward his info to Radio 4's Money Box programme or that whinging consumer lunchtime one.
They are more likely to do something with it than inActionFraud even if all they do is hold the latter's feet to the fire.