How to get Billing Address Info

Hello all,
Upon creating a customer record we need to make an API call to get some other information about the customer.  We need the address information to do this.  We are having issues getting the address information to make this call in our script.  We've tried to get the info in the beforeSubmit and the afterSubmit functions without success.

Here's some code we've tried

       if (scriptContext.type == 'create')
        {
            var curRec = scriptContext.newRecord;

            var company = curRec.getValue({fieldId: 'companyname'});
            log.debug({title: 'company', details: company});
            var a1 = curRec.getValue({fieldId: 'billaddr1'});
            log.debug({title: 'adr', details: a1});

            a1 = curRec.getSublistValue({