Dark angel is the name of a television show that I loved before it got cancelled.
Here is a kind of synopsis...
Max is a genetically-enhanced human prototype hunted by her former military handlers through the edgy, underground street life of 21st Century America. Max is aided in her quest - both to avoid capture and reunite with her "siblings" scattered in the aftermath of their escape - by Logan Cale, an idealistic cyber-journalist battling repression and corruption in post-apocalypse.
well the genetically enhanced people had barcodes on the back of their necks and were called by the last 3 numbers of it. They were also known as the X series. So that is where the x and reason for the numbers comes from and those particular numbers are my birthday.
If you want to read about the show here is a link...