ERR_NGROK_512: The domain DOMAIN has a dangling A, AAAA, ALIAS or other record pointing to ngrok - ngrok documentation

What does ERR_NGROK_512 mean?

ngrok returns ERR_NGROK_512 with this message:

The domain <DOMAIN> has a dangling A, AAAA, ALIAS or other record pointing to ngrok. The record must be deleted before this domain can be reserved.

Troubleshoot ERR_NGROK_512 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Where can I get more help with ERR_NGROK_512?

Email support@ngrok.com and include the error code.