# Overriding the machine name


The machine name is used by various components. For example:

- NServiceBus adds diagnostics headers to every message that is dispatched.
- The MSMQ transport uses the machine name for routing.

The host machine name of an endpoint instance may be overridden if the endpoint instance is uniquely identifiable:

<!-- snippet: MachineNameActionOverride -->

```cs
endpointConfiguration.UniquelyIdentifyRunningInstance()
    .UsingHostName(Dns.GetHostEntry(Environment.MachineName).HostName);
```

<!-- endsnippet -->

## Fully qualified domain names

A common override is to use the fully-qualified domain name (FQDN) of a machine for either routing or for identification.

## Resources

See [how to find the FQDN of local machine](https://stackoverflow.com/questions/804700/how-to-find-fqdn-of-local-machine-in-c-net) for a good starting point on how to get the FQDN of the local machine.