Air Force Blacklist

Hello all,

We have a customer that appears to have a portion of their ARIN-assigned IP space blocked from accessing specific US Air Force resources. We've tried opening tickets with various groups and are not getting anywhere after several months of "dancing".

I was wondering if:
1) Anyone has experience getting themselves OFF an Air Force blocked list and is willing to share tips.
2) If there are any Air Force contacts that can confirm or deny that a specific IP is indeed blocked or if we're chasing the wrong problem.

Off-list replies (obviously) welcome.