The fastest LAN searcher APP

The related area for this project: 1. NodeJS 2. Android Kotlin APp 3. LAN Knowledge Spec: The search must be done in 1~2 secs I dont want full search from ip address 1 to 254 This takes about 3 mins Searching function should be done with Kotlin And the NodeJS apps are running on the discoverable devices. (The discoverable devices are not android devices, Ubuntu system is installed on the devices)