> ## Documentation Index
> Fetch the complete documentation index at: https://ngrok.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Error 309

## ERR\_NGROK\_309

This address is reserved for another account.
Failed to create an endpoint with the address `ADDR` for the account `ACCOUNT`.
Reserve an address on your dashboard: [https://dashboard.ngrok.com/tcp-addresses/new](https://dashboard.ngrok.com/tcp-addresses/new)

If you have reserved this address, make sure that you are using an
authtoken credential for the appropriate account.

## Further help

If you're having trouble resolving this error, please reach out to [support@ngrok.com](mailto:support@ngrok.com?subject=Help%20with%20ERR_NGROK_309)