Did infinite space had a beginning?

One of the absorption is of Infinite Space. Did the dimension of Infinite Space had a beginning and therefore it is impermanent and non-self? If yes then how much time did it took for this 'plane of existence' of infinite space to begin from 0 to infinity? Was it instantaneous? (I will explain my second question in greater detail : suppose you leave planet Earth completely and all forms vanish then you enter dimension of infinite space ....my question is :this dimension of infinite space was always there and you just entered it or does it have a beginning and you entered it?)