How do I use IDD and what are the rates? January 29, 2019 01:47 Updated If you have opted for the IDD call feature, dial: 1550 + the country code of the destination you’re calling + the local number Please visit our Business Voice webpage for the prevailing IDD rates. Related articles List of MyRepublic Business Service One-Time Charges What are the Value Added Services (VAS) available for Business Voice? How do I use them? Is there a limit to the amount of IDD calls I can make?