BT OSIS – (Operator Services Information System) is the central BT/Oftel database of residential and business telephone numbers.
DES can append consumer or Business telephone numbers and even verify telephone numbers you hold on your database are correct.
The file contains in excess of 27 Million records and is updated on a daily basis with standard and ex-directory consumer details.
Upload your files for your FREE Data Audit
Upload your datafile now and we will analyse it for free and without any obligation. We will give you a report on what amendments and enhancements we can make to your data and how much it will cost (this varies depending on the quantity of records being processed) – If you don’t wish to proceed at that point, you don’t have to and it hasn’t cost you anything!
