In an emergency response system, a first set of information is used to determine (i) a first set of operator positions to whom an emergency call can be sent and (ii) an identify of a first operator identifier for each operator position in the first set of operator positions based on a set of rules. The first operator identifier for each operator position in the first set of operator positions is mapped with a second operator identifier known to a second system. A subset of the first set of operator positions is determined based on the set of rules using real-time operator information obtained from the second system associated with each of the second operator identifiers. The real-time operator information is different from the first set of information. The emergency call is routed to at least one operator position in the second set of operator positions.