sensors Mode-S transponder

44EAAE

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-ZUN · CESSNA 525C Citation CJ4

Hex
44EAAE
Octal
21165256
Decimal
4,516,526
Country
BE
Tail
OO-ZUN
Type
C25C
Broadcasting now · callsign AAB45Z · 37,000 ft
Flights observed
2
Distinct callsigns
1
Country
BE
Last broadcast
18h ago

Current position

44EAAE is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 44EAAE falls within the block assigned to Belgium (BE) by ICAO Annex 10, Volume III. Every aircraft registered in Belgium receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
AAB45Z - 2 2026-04-14

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-14 AAB45Z - Apr 14, 10:55 UTCApr 14, 11:05 UTC10m
2026-04-13 AAB45Z MAD → KJK Apr 13, 05:15 UTCApr 13, 06:55 UTC1h 40m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the OO-ZUN page for operator, model, and routing details .

Mode-S 44EAAE frequently asked

What is Mode-S code 44EAAE?
44EAAE is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-ZUN.
Where is Mode-S 44EAAE registered?
Mode-S code 44EAAE is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44EAAE broadcasting right now?
Yes. Mode-S 44EAAE is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44EAAE, octal 21165256, decimal 4,516,526.
What flights does 44EAAE operate?
Mode-S 44EAAE has broadcast 1 distinct callsign, including AAB45Z.