Airspace Frequencies & Altitude Filtering

Summary: How to find the controlling frequency for any airspace block, and how to filter airspace by altitude.

Click any airspace polygon — civil or military — to open a popup showing the frequency table for the relevant ATC sector or controller responsible for that airspace.

Filtering by Altitude

Both Civil and Military Airspace are automatically organised by vertical extent — Surface, Low Level, and Upper — so you can filter out airspace that doesn’t apply to the altitude band you’re interested in, rather than seeing every overlapping polygon at once. This is particularly useful in busy areas where several airspace types stack on top of each other.