3 ms·
Just history, I think: http://en.wikipedia.org/wiki/X-rated#United_States http://en.wikipedia.org/wiki/X-rated#United_States .xxx conforms nicely to most users
by chasingsparks 16y ago
Just history, I think: http://en.wikipedia.org/wiki/X-rated#United_States http://en.wikipedia.org/wiki/X-rated#United_States
.xxx conforms nicely to most users expectations of a three letter TLD.