List of IoT Information Gathering Tools
Shodan
https://www.shodan.io/
Shodan is a search engine that provides information about all the internet connected devices such as routers, traffic lights, CCTV cameras, servers, smart home devices, industrial devices, etc. Attackers can make use of this tool to gather information such as IP address, hostname, ISP, device’s location and the banner of the target IoT device.
Multiping
https://www.multiping.com/
(confirm)