I Europe you can tell if a number is a mobile phone or not just by the prefix, hence you can decide if you want to call this number and be charged extra. In US

I Europe you can tell if a number is a mobile phone or not just by the prefix, hence you can decide if you want to call this number and be charged extra. In US that is not the case, landlines and mobile phone share the same number pool, so it would be much more difficult to implement the European call charging system.