Kastoo
Error 509 (sometimes 429 or “too many connections”) is not a fault in your app or your TV: it is your provider’s server telling you that you are using the subscription on more devices at the same time than it allows.
What simultaneous connections are
Each subscription lets you watch on a limited number of devices at the same time: many allow only one or two. If you go over that, the server rejects the new connection with a 509 or a 429.
How to fix it
- Close the app on the other device (another TV, your phone, a computer). Pausing is not always enough: close it or stop playback.
- Wait a minute. The server takes a little while to treat the previous connection as closed.
- Try again.
If it keeps appearing
- Is anyone else using your account? If you have shared your details, someone else may be taking up the connection.
- Changing channel very quickly: some servers take a few seconds to release the previous connection. Wait a moment between channels.
- If nothing works, ask your provider to check your account or to increase the number of connections.
Other similar errors
| Error | What it means |
|---|---|
| 401 / 403 | Access denied: expired subscription or incorrect details |
| 404 | That content no longer exists on the server |
| 429 / 509 | Too many connections at once |
| 500, 502, 503 | A problem or overload on the provider’s server |
All of them explained in what HTTP errors mean.
Frequently asked questions
Does Kastoo count as a connection?
Each device that is playing counts as a connection for your provider, whichever app you use.
Does the Kastoo licence for 3 devices increase my connections?
No. The licence is for the player; the number of simultaneous connections is set by your subscription with the provider.
Why does it only happen to me at night?
Someone else may be using your account at that time, or the server may be overloaded: in that case you usually get a 5xx error instead of 509.
Free for 15 days with all features, no card needed. One licence covers 3 devices.
Kastoo is just a player: it does not sell, host or include lists, channels, movies or subscriptions. The screenshots use a demo list with openly licensed content.