How are IDD calls charged? Admin June 26, 2019 10:08 Follow IDD calls are charged in per min block. Related articles Will my IDD usages be reflected on my bills? Where can I refer to the rates for IDD services? Are there any registration fees or monthly subscription charge for IDD 001 and IDD 019? How do I make an IDD 019 call? How do I make an IDD 001 call? Comments 0 comments Please sign in to leave a comment.