Delivering crystal-clear international voice calls to over 300 destinations worldwide at some of the lowest rates, iDD 1521 gives its business customers the edge in the global marketplace. iDD 1521 service lets you save up to 90% on your IDD calls.

IDD1521 is available with all existing fixed, mobile or fax telephone number from any operator (Singtel/M1/StarHub). Upon registration you will be able to call any overseas number directly, by simply adding the prefix "1521".