Groovy code to return different numbers

SmartBear Support wrote:
Hi, You can add a test case level property and add set uuid and then perform a get data(point and click) to add the value on a different test step, You can generate a unique ID using in a groovy script TestStep, def uuid = UUID.randomUUID() testRunner.testCase.setPropertyValue( "uuid", uuid )

Hi Jeshtha,

Thanks for your quick response. However, I am not looking forward to generating any uuid, but is concerned with generating 12 digit numbers (MSISDN) for ex : 966500000001.

I have this range of numbers in the database from 966500000001 to 966520000001. (20 Million records to be exact). I need to load test by passing one msisdn to my test request. Only thing I cannot use a MSISDN (number) twice.