1. A method, comprising: accessing an identification code associated with a cell in a wireless access network that is detected by a mobile device; determining a probability score for candidate cells that are assigned the identification code in the wireless access network, the probability score based on a likelihood that a candidate cell is a cell in the wireless access network associated with the identification code detected by the mobile device; and selecting one of the candidate cells as an origination cell of the identification code detected by the mobile device based on the determined probability scores.