In the strictest sense that makes me an agnostic atheist.
But define "know". Strictly speaking I cannot know if there's a teleportable pink unicorn in my closet either. However, I work on the assumption that I know there isn't one.
So that makes me an agnostic atheist in philosophy, and an atheist in practice. I never cared much for this kind of philosophy.
Yeah then we get to epistemology and ontology which ends up totally irrelevant to what beliefs people say they hold in regards to their religion.