"What if the USA's FCC awarded another company several new area codes that duplicated
Neustar/Neulevel/NANPA area codes?"
No, actually, the situation of the "alternate
roots" is more like "What if some office PBX phone exchange configured itself to
pretend it was at some nonexistent area code, and then got a few friends to program
THEIR PBXes to recognize that unofficial area code too (while normal phone customers
worldwide couldn't call that area code because it really didn't exist), and then
the real official phone system decided to assign that area code to some location
on the other side of the country, causing the handful of people who had configured
the nonstandard area code to have a conflict. Should the official system be
constrained not to "conflict" with such unauthorized use of fake area codes?
The
same is true about domains. The fact that some bozo somewhere set up a server
that pretended to recognize a .biz or .info domain, or any other string of characters,
doesn't establish any claim to that string as part of the address space of the real
Internet.