With no immediate connotations or connections, this abstract domain name could work for a huge range of companies.
The name "x3e" has only three letters and only two syllables. Two-syllable names are highly rare and highly desirable. Two syllable names are used by established brands like Delta, Walmart and YouTube.
This domain was first registered in March 2004. Older domains have an advantage when ranking in search engines.
X3e.com is a dot-com domain. Dot com domains are the most sought after top-level-domain in the world, famously used by websites like facebook.com. Once secured, a dot-com all but guarantees no-one else can outrank you for your own name in the long run.