Public/Get-Whois.ps1
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function Get-WhoIs { <# .Synopsis Does a raw WHOIS query and returns the results .Example Get-Whois poshcode.org The simplest whois search .Example Get-Whois poshcode.com This example is one that forwards to a second whois server ... .Example Get-Whois poshcode.com -NoForward Returns the partial results you get when you don't follow forwarding to a new whois server #> [CmdletBinding()] param( # The query to send to WHOIS servers [Parameter(Position = 0, ValueFromRemainingArguments = $true)] [string]$query, # A specific whois server to search [string]$server, # Disable forwarding to new whois servers [switch]$NoForward ) end { $TLDs = DATA { @{ ".br.com" = "whois.centralnic.net" ".cn.com" = "whois.centralnic.net" ".eu.org" = "whois.eu.org" ".com" = "whois.crsnic.net" ".net" = "whois.crsnic.net" ".org" = "whois.publicinterestregistry.net" ".edu" = "whois.educause.net" ".gov" = "whois.nic.gov" } } $EAP, $ErrorActionPreference = $ErrorActionPreference, "Stop" $query = $query.Trim() if ($query -match "(?:\d{1,3}\.){3}\d{1,3}") { Write-Verbose "IP Lookup!" if ($query -notmatch " ") { $query = "n $query" } if (!$server) { $server = "whois.arin.net" } } elseif (!$server) { $server = $TLDs.GetEnumerator() | Where-Object { $query -like ("*" + $_.name) } | Select-Object -Expand Value -First 1 } if (!$server) { $server = "whois.arin.net" } $maxRequery = 3 do { Write-Verbose "Connecting to $server" $client = New-Object System.Net.Sockets.TcpClient $server, 43 try { $stream = $client.GetStream() Write-Verbose "Sending Query: $query" $data = [System.Text.Encoding]::Ascii.GetBytes( $query + "`r`n" ) $stream.Write($data, 0, $data.Length) Write-Verbose "Reading Response:" $reader = New-Object System.IO.StreamReader $stream, [System.Text.Encoding]::ASCII $result = $reader.ReadToEnd() if ($result -match "(?s)Whois Server:\s*(\S+)\s*") { Write-Warning "Recommended WHOIS server: ${server}" if (!$NoForward) { Write-Verbose "Non-Authoritative Results:`n${result}" # cache, in case we can't get an answer at the forwarder if (!$cachedResult) { $cachedResult = $result $cachedServer = $server } $server = $matches[1] $query = ($query -split " ")[-1] $maxRequery-- } else { $maxRequery = 0 } } else { $maxRequery = 0 } } finally { if ($stream) { $stream.Close() $stream.Dispose() } } } while ($maxRequery -gt 0) $result if ($cachedResult -and ($result -split "`n").count -lt 5) { Write-Warning "Original Result from ${cachedServer}:" $cachedResult } $ErrorActionPreference = $EAP } } |