At 1707:56 when the crew made their unsolicited report of their cruise level, the aircraft had 60nm to run to IGARI. See ACARS position report for speed at 34998 given as 278kts. I find this rather curious. This kind of call is made more commonly when the frequency has gone silent for a while and the crew politely remind the controller of the approach to their next reporting sector. In this instance, the report clearly shows that atc were in communication with other aircraft on the frequency. Perhaps they were expecting an earlier release to the next sector. The question is why the rush.