Powershell DNS forward lookup zone list then check - powershell

Question

Ok so we are migrating to a new NS for all of our external domains. The current one has plenty of domains that are no longer valid but have not been removed. I am attempting to export a list of all forward lookup zones in DNS, ping them to see if they are alive and sort too two different files so i can recheck the bad names manually.
First need to export to a file so it can be moved to a different location for testing.
Export
dnscmd /enumzones /Forward | out-file C:\temp\zones.txt
Test
$names = Get-Content "C:\temp\zones.txt"
foreach ($name in $names){
if (Test-Connection -ComputerName $name -Count 1 -ErrorAction SilentlyContinue){
Add-Content c:\temp\resolved.csv "$name,up"
}
else{
Add-Content C:\temp\unresolved.csv "$name,down"
}
}
Problem
The export command writes a value with extra information.
I.E.
Enumerated zone list:
Zone count = 673
Zone name Type Storage Properties
. Cache File
domain1.com.au Primary File
domain2.co.nz Primary File
domain3.com.au Primary File
No problem with just clearing out the top of the file etc, but how can I format the zone list output so the powershell can read it?
Answer
Answer for Server 2012 marked below by #sodawillow, I had to teak a little for 2008R2, but couldn't of done it with out his answer.
I also messed with it a little as i was having issues with none of the names resolving due to white space from export.
#store forward lookup zones names in an array
$zoneNames = Get-WmiObject -Namespace Root\MicrosoftDNS -Class "MicrosoftDNS_Zone" | ? { $_.ContainerName -Notlike '..RootHints' -And $_.ContainerName -NotLike '..Cache' -And !$_.Reverse } | Select Name
#declare results arrays and files paths
$resolvedZones = #()
$unresolvedZones = #()
$resolvedFile = "C:\Temp\resolved.csv"
$unresolvedFile = "C:\Temp\unresolved.csv"
#for each zone name
foreach ($zoneName in $zoneNames){
$string = $zoneName.Substring(0)
$string = $string.Trim()
#if it responds to ping
if (Test-Connection -ComputerName "$string" -Count 2 -ErrorAction SilentlyContinue) {
#build result object and add it to resolved zones array
$resolvedZones += [PSCustomObject]#{ ZoneName = $zoneName; Status = "UP" }
} else {
#build result object and add it to unresolved zones array
$unresolvedZones += [PSCustomObject]#{ ZoneName = $zoneName; Status = "DOWN" }
}
}
#export results arrays as CSV in results files (if not empty)
if($unresolvedZones.Length -gt 0) { $unresolvedZones | Export-Csv $unresolvedFile -NoTypeInformation }
if($resolvedZones.Length -gt 0) { $resolvedZones | Export-Csv $resolvedFile -NoTypeInformation }

Answer 1

Note : I have mixed forward and reverse in my answer, but it
demonstrates how you can retrieve and re-use DNS zone names.
There is an appropriate PowerShell cmdlet to list DNS zones, Get-DNSServerZone.
Here is an adapted script :
#store reverse lookup zones names in an array
$zoneNames = (Get-DnsServerZone | Where-Object { $_.IsReverseLookupZone -eq $true }).ZoneName
#declare results arrays and files paths
$resolvedZones = #()
$unresolvedZones = #()
$resolvedFile = "C:\Temp\resolved.csv"
$unresolvedFile = "C:\Temp\unresolved.csv"
#for each zone name
foreach ($zoneName in $zoneNames){
#if it responds to ping
if (Test-Connection -ComputerName $zoneName -Count 2 -ErrorAction SilentlyContinue) {
#build result object and add it to resolved zones array
$resolvedZones += [PSCustomObject]#{ ZoneName = $zoneName; Status = "UP" }
} else {
#build result object and add it to unresolved zones array
$unresolvedZones += [PSCustomObject]#{ ZoneName = $zoneName; Status = "DOWN" }
}
}
#export results arrays as CSV in results files (if not empty)
if($unresolvedZones.Length -gt 0) { $unresolvedZones | Export-Csv $unresolvedFile -NoTypeInformation }
if($resolvedZones.Length -gt 0) { $resolvedZones | Export-Csv $resolvedFile -NoTypeInformation }