1. A method, comprising: receiving a non-unique identification code of a cell detected by a mobile device in a wireless telecommunications network; determining probability scores for respective candidate cells that are assigned the non-unique identification code, each respective probability score being based on a likelihood that the associated respective candidate cell is the source of the first non-unique identification code of the cell detected by the mobile device; and selecting a candidate cell with a highest probability score as an origination cell of the first non-unique identification code, wherein determining probability scores includes: determining a code overlap factor based on a number of cell identification codes that overlap between a first list of cell identification codes for a predetermined source cell and a second list of cell identification codes for an associated candidate cell; and incrementing a probability score for the associated candidate cell by the code overlap factor, wherein the first list of cell identification codes includes cell identification codes from detected set reports (DSRs) associated with the source cell and cell identification codes from a neighbor list of the source cell, and wherein the second list of cell identification codes includes cell identification codes from DSRs associated with the candidate cell and does not include cell identification codes from a neighbor list of the candidate cell.