In Bluemix's VM Service, I've been creating instance using floating IPs from the Public-Network. Most of the time when I delete an instance, the IP is released. However, after a few weeks of testing, I see that 3 out of my 11 floating IPs are still allocated. Is there a way to unallocate them? To reiterate: I do not currently have any instances.
This looks like the old bug here: https://bugs.launchpad.net/nova/+bug/997763, which was supposedly fixed in Folsom.
To fix your issue, click on Access & Security tab --> Floating IPs in Horizon dashboard Select all. Release all.