The District Code Update functionality can be used to acquire and add legislative district numbers and append 9-digit zip codes to contact records in the CRM database. How recent is the data that is used to determine these district codes?
Blackbaud Sphere works with a third party vendor who supplies this data. As of February 2012, the codes are still off the 2000 census data. Until the 113th congress is sworn in, the new district codes are not in effect.