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Aeronautical information management requires robust systems capable of handling complex spatiotemporal data with precision and reliability. Currently, operators rely on fragmented solutions—including public database webservices and manually annotated maps—creating significant challenges in data currency, information sharing, and operational accuracy. This fragmentation increases error risks and reduces operational efficiency. NESTOR addresses these challenges as a comprehensive web-based aeronautical mapping application developed by DSNA that centralizes critical visualization needs through an intuitive JavaScript and D3.js interface. By integrating data from French AIS, Eurocontrol's CACD database, and IGN elevation data, NESTOR enables real-time trajectory analysis, FIS boundary visualization, and interactive aeronautical mapping. This paper presents implementation results from the French ATS Reporting Office (ARO) and NOTAM Office (NOF), demonstrating significant improvements in flight plan processing efficiency and reduced error rates. We further showcase NESTOR's adaptability through a case study of the Paris Air Show airspace management. Beyond current implementation, NESTOR represents a significant step toward standardized aeronautical data visualization with potential applications across air navigation services.