PBN sites are down (bad hosting?)

I made around 25 pbn last year and I didn't touch or check on them the whole time. Now I'm getting renewal messages and I start checking to see which have/haven't been deindexed . For about half of them , when I type the address into google search bar, I don't get the site, I get a page from my nameserver saying "This domain is registered at ****** ".

Does this mean that my dollar hosting company just skipped town and my domain is still viable?

I think there are waiting for your renew part

I bought a year for both hosting and the domain, a year hasn't quite passed yet.

are you sure they have not be reindexed before already?

If you're at 1and1 just leave them because they're the worst hosting company I've ever known. Go with some reputable host eg: Hostgator or Justhost