Quick PowerShell script to automate PTR Record creation for existing forward lookup zones.

Create-PtrRecords.ps1

# Creates PTR Records for all A Records in the specified -ZoneName.
# Uses a Class A Subnet for the reverse zone.
$computerName = 'dns-server01'; 

# Get all the DNS A Records.
$records = Get-DnsServerResourceRecord -ZoneName 'zone.example.com' -RRType A -ComputerName $computerName; 
foreach ($record in $records) 
{ 
    # The reverse lookup domain name.  This is the PTR Response.
    $ptrDomain = $record.HostName + '.zone.example.com'; 

    # Reverse the IP Address for the name record.
    $name = ($record.RecordData.IPv4Address.ToString() -replace '^(\d+)\.(\d+)\.(\d+).(\d+)$','$4.$3.$2');
    
    # Add the new PTR record.
    Add-DnsServerResourceRecordPtr -Name $name -ZoneName '10.in-addr.arpa' -ComputerName $computerName -PtrDomainName $ptrDomain; 
}