Data Source: We manually looked up prepaid rates on providers’ websites for both prisons and jails in October and November of 2018. We calculated the ratio for each state by dividing the average cost of a 15-minute in-state call from jail by the cost of a 15-minute in-state call from state prison. For more, see our methodology. (Map: Peter Wagner, 2019)

This map originally appeared in State of Phone Justice: Local jails, state prisons and private phone providers.