I'm going to guess that 0lx.net domain is still used in the backend in some way since going to that website goes to ifastnet.com these days.
Interesting. I seem to recall the 'subdomains' section of vPanel only let you make subdomains under either the domain you signed up under or the byethost ones like 22web.org/web1337.net/html-5.me and stuff.
Somewhat unrelatedly, it seems like there's quite a few MOFH resellers actually owned by iFN themselves that might have been used for demonstrative purposes or just simply exist for whatever reason: 4sql.net, cuccfree.com, kwikphp.com, hyperphp.com, sprinterweb.net, xlphp.net, free-hoster.net being among them... (registrant details state that they belong to iFN themselves, at least. also did the company at some point move from the US to the UK?)