New Frontier: Where in the Multiverse Is It?

I was just chatting with a friend in a flash group I belong to in Facebook and I suddenly started thinking.
Is the New Frontier Earth still out in the multiverse?
If so, what’s it’s designation?
Is it perpetually stuck in the late 50’s Early 60’s?

It’s hard to say if it’s still around given the current havoc Death Metal is wreaking on the multiverse, but putting that aside, its designation is supposed to be Earth-21


It has a multiversal designation, but to the best of my knowledge they haven’t done any contemporary stories in that universe.