resolve ip list with powershell

I have a list of IP addresses in a text file (one per line). I'm trying to run powershell to resolve all the ip addresses and save the results to a file. Here what I used:  

Get-Content c:\temp\hosts.txt | ForEach-Object { ([Net.Dns]::GetHostByAddress($_)).HostName } >> c:\temp\results.txt

I am getting the following error.

Exception calling "GetHostByAddress" with "1" argument(s): "The requested name is valid, but no data of the requested t
ype was found"
At line:1 char:78
+ Get-Content c:\temp\hosts.txt | ForEach-Object { ([Net.Dns]::GetHostByAddress <<<< ($_)).HostName } >> c:\temp\result
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : DotNetMethodException

Please help. Thanks.
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Try the following.  When you use Get-Content, the objects it creates don't have properties (like they would if you used Import-CSV).
Get-Content c:\temp\hosts.txt | ForEach-Object { ([Net.Dns]::GetHostByAddress($_) } >> c:\temp\results.txt

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Error says DNS unable to resolve the IP to hostname... You can have some error control to log this error..

Get-Content c:\temp\hosts.txt | % {
$ip = $_
	Try {
	$HostName = ([Net.Dns]::GetHostByAddress($ip)).HostName
	"" | Select @{N="IP";E={$ip}},@{N="HostName";E={$HostName}}
	"" | Select @{N="IP";E={$ip}},@{N="HostName";E={"No HostNameFound"}}
} | Export-Csv c:\temp\hostname.csv -NTI

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Errmm...  I feel stupid.  Didn't look closely enough.
Thanks for the catch, Subsun.  :)
No problem, it happens with everyone... :)
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