sensors Mode-S transponder

A52AED

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N432DX · AIRBUS A-330-900 · operated by DELTA AIR LINES INC, DEPT. 595 AIRCRAFT REGISTRATION

Hex
A52AED
Octal
51225355
Decimal
10,824,429
Country
US
Tail
N432DX
Type
A339
No current signal · last broadcast 1d ago
Flights observed
7
Distinct callsigns
3
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A52AED.

Country allocation

The ICAO 24-bit address A52AED falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 3 distinct

Callsign Airline Flights Last seen
DAL960 - 3 2026-04-13
DAL771 - 2 2026-04-13
DAL2342 - 2 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 DAL2342 - Apr 13, 16:15 UTCApr 13, 18:05 UTC1h 50m
2026-04-13 DAL2342 - Apr 13, 16:00 UTCApr 13, 18:15 UTC2h 15m
2026-04-13 DAL960 - Apr 13, 08:20 UTCApr 13, 09:20 UTC1h 0m
2026-04-13 DAL960 - Apr 13, 07:55 UTCApr 13, 09:20 UTC1h 25m
2026-04-13 DAL960 - Apr 13, 04:50 UTCApr 13, 08:15 UTC3h 25m
2026-04-13 DAL771 - Apr 13, 00:20 UTCApr 13, 03:05 UTC2h 45m
2026-04-12 DAL771 - Apr 12, 23:55 UTCApr 13, 03:05 UTC3h 10m

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 N432DX page for operator, model, and routing details .

Mode-S A52AED frequently asked

What is Mode-S code A52AED?
A52AED is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N432DX.
Where is Mode-S A52AED registered?
Mode-S code A52AED is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A52AED broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A52AED, octal 51225355, decimal 10,824,429.
What flights does A52AED operate?
Mode-S A52AED has broadcast 3 distinct callsigns, including DAL960, DAL771, DAL2342.