Replicant Registration database was a record database used to register all replicant data and information. The human supremacy movement utilized the database to locate and kill all replicants.
With the help of Ren Dus, replicants Iggy Cygnus and Trixie launched an attack on the Tyrell Corporation, where database servers were stored and ultimately destroyed them. Ren launched an electromagnetic pulse that exploded over Los Angeles, wiping all electronic information. This event was later known as the "Blackout."[1]