Well I did think of that, it technically is not a Class-A because it should have 2 parts. My conclusion was that maybe what happens is that "1", while incorrect, is flexibly parsed as "1.0" and thus it would become "1.0.0.0". But you're right that, given the uint32 representation does exist, the most correct thing to do seems to interpret it as "0.0.0.1"...
unless an exception to the rule exists somewhere, and 'ip' is actually doing it right!
unless an exception to the rule exists somewhere, and 'ip' is actually doing it right!