IANA gives expectations on this matter. For IPv4, Here's what they may have inside their "Unique purpose deal with registry". That means, for our purposes, anything at all in these handle blocks should not be assigned because they shouldn't be routable "publicly". Number945Number945 61711 gold badge55 silver badges99 bronze badges https://loans-like-credit-ninja08219.tribunablog.com/what-does-255-payday-loan-mean-51022470