I'm trying to get the name of a DNS server `4.2.2.1`. 

Using `host 4.2.2.1` I get this output:

```
1.2.2.4.in-addr.arpa domain name pointer a.resolvers.level3.net

```

in my script, I do this as:

```
name="$($host $server)"

```

How can I use sed/awk on `$name` to only get the `a.resolvers.level3.net`, keeping in mind that I'll use this on completely different servers so I can't just `grep a.resolvers` out of the variable?