The Iranun are a Moro ethnic group native to Mindanao, Philippines, and the west coast of Sabah, Malaysia (in which they are found in 25 villages around the Kota Belud and Lahad Datu districts; also in Kudat and Likas, Kota Kinabalu).
The earliest known postal order that is known was issued at Lahad Datu in 1909.
Occupying a large part of the peninsula forming the northern headland of Darvel Bay, it is located 48 kilometers east of Lahad Datu.