Telephone Number Appending

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 file(s) now for your FREE audit to check the current health of your database and
start saving money today.

Alternatively, call us now on 0208 481 9466 and one of our operators will be pleased to help.