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? Are there any registration fees or monthly subscription charge for IDD 001 and IDD 019? Where can I refer to the rates for IDD services? 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.