TCP Ports Used by the gRPC Service - sparky8512/starlink-grpc-tools GitHub Wiki

The scripts in this project use TCP port 9200 to connect to the gRPC service running on the Starlink dish.

The Starlink Android app, and presumably the other flavors of the app, actually uses port 9201 instead of 9200. Both appear to expose the same gRPC service, but the one on port 9201 uses gRPC-Web, which can use HTTP/1.1, whereas the one on port 9200 uses HTTP/2, which is what most gRPC tools expect.

The Starlink router also exposes a gRPC service, on ports 9000 (HTTP/2.0) and 9001 (HTTP/1.1).