Copies of the World Radio TV Handbook (including the 1991 edition) have identified 1584 kHz as a local frequency, akin to the Class C (former Class IV) radio stations in North America which are limited to 1kW.
The following radio stations broadcast on AM frequency 1584 kHz: Australia 4CC in Rockhampton, Queensland 5WM in Woomera, South Australia (ABC North/West) 7SH in St Helens, Tasmania (ABC National) 2WA in Wilcannia, New South Wales (ABC Broken Hill)
Italy Free Radio AM - Radio Diffusione Europea
Hong Kong RTHK Radio 3
Japan JOQG in Hukaura JOBG in Shimabara (both NHK-1)
Korea HLDK in Danyang HLQZ in Geumsan (both KBS-1)
Palau T8AA in Koror
The Philippines DWBR-AM in Talavera
References