ahaha I still remember when 3com forced icann to allow leading numbers and that was some shitstorm
<quote>
2.1 Host Names and Numbers
The syntax of a legal Internet host name was specified in RFC-952 [DNS:4]. One aspect of host name syntax is hereby changed: the restriction on the first character is relaxed to allow either a letter or a digit. Host software MUST support this more liberal syntax.It's from 1989. ICANN was founded in 1998.