Briefing by BASARNAS (Indonesian National SAR).
Some info from Reuters:
AirAsia flight carrying 162 people goes missing in Southeast Asia: officials | Reuters
Flight QZ8501 was between the Indonesian port of Tanjung Pandan and the town of Pontianak, in West Kalimantan province on Borneo island, when it went missing, Atmodjo told a news conference in Jakarta.
The aircraft had been flying at 32,000 feet and had asked to fly at 38,000 feet to avoid clouds, he added.