I'm not sure where to send this information so I hope it's okay to share it with the mailing list, as well as the whois registrants:
I went to register for a new account at https://serweb.iptel.org/user/reg.
Firefox told me that the SSL certificate was bad. Specifically:
-- serweb.iptel.org uses an invalid security certificate. The certificate is not trusted because it was signed using a signature algorithm that was disabled because that algorithm is not secure. The certificate expired on 10/22/2014 12:39 AM. The current time is 08/01/2016 09:55 PM. --
Thank you.