It looks like it doesn't expire for several months. As I mentioned yesterday, a couple of my sites got hit with what the ISPs decribed as an ICANN mistake. They thought the sites were orphans and zapped their DNS entries to see if anyone complained. I complained and it was fixed. Curiouser and curiouser.
Right now, FR works on my iPhone on Verizon but not WiFi, on my iPad on ATT LTE but not WiFi, and not on 3 Macs, all on the same home network.
Looks like my ISP but not VZW or ATT has it blocked.