N/search Module
Result.id
Property Description: The internal ID for the record returned in a search result row. This ID is a number, but it is stored in this property as a string (for example, '237').
Type: string (read-only)
Supported Script Types: All script types For more information, see SuiteScript 2.0 Script Types.
Module: N/search Module
Since: 2015.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=Result.id

// Code Example 1

// Add additional code

//...

var mySearch = search.create({

    type: search.Type.CUSTOMER

});



var resultSet = mySearch.run();



resultSet.each(function(result) {

    log.debug({

        title: 'Record Internal ID: ',

        details: result.id

    });



    return true;

});

//...

// Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_454656921386.html