ICAO Block Allocations

ICOA Block Allocations by Country

The International Civil Aviation Organization (ICAO) allocates countries a specifc number of aircraft identification numbers (not to be confused with registration numbers) for their use. These allocations are often referred to as ICAO 24bit aircraft addresses.

This table shows the number of aircraft observed in each block and how full the block is.

When the block is close to being full a country can request a new block.

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