According to the Quran, Allah tells us that He is the only creator and sustainer of all that exists and that nothing and no one exists alongside Him, nor does He have any partners. He tells us that He is not created, nor is He like His creation in anyway. He calls Himself by a number of names and three of them are:
A) The First – (Al-Awwal) B) The Last – (Al Akhir) C) The Eternal, who is sought after by His creation, while He has no need from them at all. (As-Samad)
He always has existed and He never was created, as He is not like His creation, nor similar to it, in any way.