Be careful how you use this information as a quick scan shows a number of errors. For example I dont believe India overflights are valid for advanced departures of -12 hours. I certainly wouldnt want an aircraft overflying India if it was -12 hours before the granted permission. I can foresee a hefty diversion under those circumstances.
Seems weird that econflights would provide such information but display under services that they can obtain 'overflight and landing permissions' on behalf of the operator. Is'nt this information going against what you are trying to sell?