There is a standard SSDP multicast address and port (239.255.255.250:1900) used for local area network communication. The Roku device responds to M-SEARCH queries on this IP address and port. To query for a Roku device IP address, send the following HTTP request to 239.255.255.250 port 1900:
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Nov 12, 2019 How to find your Roku device's IP address in 3 ways The System Info page has the IP address and other networking details. How to find a Roku IP address in a web browser. Another way to find the IP address is using a free extension for the Chrome