Thats a great tool, tried in on my cellphone and my google voice numbers, and yep, did identify them correctly.
But you are right this is a creeping thing, and in many aspects the banks are right to tighten the screws on security.
I'm not sure if this is true in Europe, but in North America the scam calls you get which spoof the number to look like a local area code, even down to a local prefix for everything from car warranties, time shares, medical alert devices are insane.
Those are an irritation, although I do like to play with them sometimes, but move that on to financial institutions and I get the concerns with virtual numbers