Zacatecas, Zacatecas
Once Niñas y Niños is only available on Canal Once transmitters owned by the IPN and as the subchannel of one separately owned station, XHZHZ-TDT in Zacatecas, Zacatecas. A third subchannel, known as Mente Abierta, was authorized for the IPN transmitter network in August 2020.