You can use the Random.Netiden API from your website to generate a random number, or you can generate it yourself.

Calling the Random.Netiden API:

You can call this API from your website at:

http://soap.netiden.com/random.netiden

or, for SSL connections:

https://soap.netiden.com/random.netiden

The result of the Random.Netiden API is a field called <Number>:

Calling the Random.Netiden API in ASP:

<%
dim oHttp
dim xmldom   
dim txtRequestString
dim result
set oHttp = CreateObject("MSXML2.XMLHTTP")
set xmldom = CreateObject("msxml2.domdocument")

'DEFINES THE REQUEST STRING VARIABLE
txtRequestString = "http://soap.netiden.com/Random.netiden"

'CALLS THE NETIDEN API
oHttp.open "GET",txtRequestString , false
oHttp.send
xmldom.async =false
xmldom.loadXML (oHttp.responseText)

If (xmldom.parseError.errorCode <> 0) Then
      Dim myErr
      Set myErr = xmldom.parseError
Else
      For i=0 to xmldom.documentElement.childNodes.length-1
               Set currNode = xmldom.documentElement.childNodes.Item(i)
               Select Case currNode.nodeName
                              case "Number"
                                                            Number=currNode.nodeTypedValue
                End Select
        Next
End If

Response.write (Number)

%>

Generating a random number in ASP:

Randomize
randcode = Int(9000 * Rnd + 1000)

Generating a random number in PHP:

$random = (rand() % 9000) + 1000;