Malaria remains a public health concern in Indonesia, especially in the east. The intervention of the Long Lasting Insecticides Nets (LLINs) distribution program is one of the strategies used to reduce malaria cases in Indonesia. Therefore, treating LLINs according to the guidelines is critical to maintaining the effectiveness of the mosquito net. This research aimed to determine the ownership, usage and maintained LLINs behaviour after they were distributed in 2019-2020. This study was an observational study with a cross-sectional design. In six malaria-endemic districts, structured questionnaires were administered to 2,658 households in randomly selected villages that received bed nets in 2019-2020. Of the 2658 households, 2421 are known to have LLINs. The data collected included mosquito net ownership, utilization, socio-demographic characteristics such as gender, age, education, occupation, household size, and LLINs care behaviour. The collected data were analyzed descriptively. The study found that 91% of households had at least one LLIN, and 84.7% slept under LLINs the previous night. In addition, 82.6% of households followed the washing instructions for the bed net, and most households (64.8%) followed the care instructions for mosquito nets. However, 34.4% of households were still drying the mosquito nets in direct sunlight. The overall maintenance behaviour for LLINs, beginning with the first time they received the bed net and including how to wash and dry it, was inconsistent with the correct usage instructions (88.4%). Better community education and promotion by health workers on the appropriate use and upkeep of LLINs are essential to ensure the effectiveness of LLINs-based malaria interventions.