A first communication device generates a first ranging frame for transmission to a set of second communication devices, and transmitting the first ranging frame during an multi-user (MU) ranging measurement procedure for estimating respective distances between respective second communication devices, among the set of second communication devices, and the first communication device based on measuring times of flight of transmissions between the first communication device and the respective second communication devices. The first communication device then generates a second ranging frame to include timing information corresponding to transmission of the first ranging frame, the timing information indicative of a time of transmission of the first ranging frame by the first communication device. The first communication device transmits the second ranging frame during the MU ranging measurement procedure to second communication devices to permit the second communication devices to synchronize ranging measurement timing with the first communication device.