Until July 26, 17 prank calls were directed to the centre in Nakhon Ratchasima, 14 in Nakhon Pathom, 10 in Trang, 8 in Tak, 7 in Ratchaburi and 1 in Samut Songkhram.
Anucha Setsatient, secretary-general of the institute, said that such calls disrupted the rescue operations. He pleaded for no more prank calls.
The institute recently released a VDO showing a patient who died because of a prank call.