Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD3FD9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N953AN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
AD3FD9
Octal
53237731
Decimal
11,354,073
Country
US
Tail
N953AN
Type
B738
No current signal · last broadcast Jul 26, 19:35 UTC
Flights observed
495
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:35 UTC

Last known position

Most recent position reported by Mode-S AD3FD9.

Country allocation

The ICAO 24-bit address AD3FD9 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 20 distinct

Callsign Airline Flights Last seen
AAL2757 - 9 2026-07-06
AAL1114 - 7 2026-07-02
AAL1492 American Airlines 5 2026-05-27
AAL1356 American Airlines 5 2026-07-23
AAL3244 American Airlines 4 2026-07-19
AAL3166 American Airlines 4 2026-04-19
AAL2813 American Airlines 4 2026-04-15
AAL2617 - 4 2026-06-16
AAL1902 American Airlines 4 2026-05-20
AAL1821 - 4 2026-07-21
AAL1723 - 4 2026-07-13
AAL1624 - 4 2026-06-16
AAL1603 - 4 2026-07-20
AAL158 - 4 2026-07-13
AAL1446 American Airlines 4 2026-05-15
AAL1215 - 4 2026-06-15
AAL1148 American Airlines 4 2026-05-05
AAL831 American Airlines 3 2026-06-14
AAL815 American Airlines 3 2026-06-13
AAL650 American Airlines 3 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL819 DFW → CVG Jul 26, 16:55 UTCJul 26, 19:35 UTC2h 40m
2026-07-26 AAL1978 CLT → BOS Jul 26, 12:20 UTCJul 26, 14:50 UTC2h 30m
2026-07-25 AAL472 DFW → DCA Jul 25, 22:30 UTCJul 26, 01:00 UTC2h 30m
2026-07-25 AAL472 DFW → DCA Jul 25, 22:29 UTCJul 26, 01:04 UTC2h 35m
2026-07-25 AAL3307 JFK → LIR Jul 25, 18:10 UTCJul 25, 19:55 UTC1h 45m
2026-07-25 AAL1710 MCO → PHL Jul 25, 14:55 UTCJul 25, 16:40 UTC1h 45m
2026-07-25 AAL1254 CLT → PVD Jul 25, 11:35 UTCJul 25, 13:30 UTC1h 55m
2026-07-25 AAL2992 DFW → AUS Jul 25, 01:05 UTCJul 25, 02:50 UTC1h 45m
2026-07-24 AAL355 GCM → DFW Jul 24, 15:30 UTCJul 24, 22:25 UTC6h 55m
2026-07-24 AAL1066 - Jul 24, 11:25 UTCJul 24, 13:35 UTC2h 10m
2026-07-24 AAL2417 DFW → MEX Jul 24, 00:55 UTCJul 24, 03:05 UTC2h 10m
2026-07-23 AAL1356 EWR → CLT Jul 23, 20:27 UTCJul 23, 22:09 UTC1h 42m
2026-07-23 AAL1356 EWR → CLT Jul 23, 20:30 UTCJul 23, 22:10 UTC1h 40m
2026-07-23 AAL1356 EWR → CLT Jul 23, 17:30 UTCJul 23, 19:20 UTC1h 50m
2026-07-23 AAL3193 - Jul 23, 15:15 UTCJul 23, 16:00 UTC45m
2026-07-23 AAL3193 IAH → DFW Jul 23, 15:12 UTCJul 23, 15:59 UTC47m
2026-07-23 AAL3193 - Jul 23, 12:50 UTCJul 23, 13:35 UTC45m
2026-07-23 AAL2551 CLT → BOS Jul 23, 10:10 UTCJul 23, 10:55 UTC45m
2026-07-23 AAL2230 MIA → IAH Jul 23, 02:40 UTCJul 23, 04:55 UTC2h 15m
2026-07-22 AAL3300 DFW → LIT Jul 22, 22:20 UTCJul 23, 00:45 UTC2h 25m
2026-07-22 AAL3300 DFW → LIT Jul 22, 18:25 UTCJul 22, 20:50 UTC2h 25m
2026-07-22 AAL1026 SDQ → MIA Jul 22, 14:46 UTCJul 22, 16:39 UTC1h 53m
2026-07-22 AAL1026 - Jul 22, 01:00 UTCJul 22, 16:40 UTC15h 40m
2026-07-21 AAL368 MIA → SDQ Jul 21, 23:40 UTCJul 21, 23:55 UTC15m
2026-07-21 AAL1600 SJO → MIA Jul 21, 19:15 UTCJul 21, 21:40 UTC2h 25m
2026-07-21 AAL1593 BOS → CLT Jul 21, 15:10 UTCJul 21, 17:35 UTC2h 25m
2026-07-21 AAL2696 HAV → MIA Jul 21, 12:45 UTCJul 21, 13:20 UTC35m
2026-07-21 AAL2699 MIA → HAV Jul 21, 10:25 UTCJul 21, 11:00 UTC35m
2026-07-21 AAL2699 MIA → HAV Jul 21, 10:24 UTCJul 21, 11:16 UTC52m
2026-07-21 AAL1821 - Jul 21, 00:10 UTCJul 21, 01:55 UTC1h 45m
2026-07-20 AAL1821 - Jul 20, 20:45 UTCJul 20, 22:05 UTC1h 20m
2026-07-20 AAL1006 - Jul 20, 16:20 UTCJul 20, 18:30 UTC2h 10m
2026-07-20 AAL1603 - Jul 20, 14:45 UTCJul 20, 15:00 UTC15m
2026-07-20 AAL1603 - Jul 20, 12:40 UTCJul 20, 14:10 UTC1h 30m
2026-07-20 AAL1603 MIA → GUA Jul 20, 12:39 UTCJul 20, 14:56 UTC2h 17m
2026-07-19 AAL1821 - Jul 19, 20:30 UTCJul 20, 01:55 UTC5h 25m
2026-07-19 AAL1006 - Jul 19, 16:20 UTCJul 19, 18:25 UTC2h 5m
2026-07-19 AAL1603 HWO → GUA Jul 19, 12:45 UTCJul 19, 15:00 UTC2h 15m
2026-07-19 AAL3244 MIA → LAS Jul 19, 04:05 UTCJul 19, 06:10 UTC2h 5m
2026-07-19 AAL3244 MIA → LAS Jul 19, 04:05 UTCJul 19, 06:09 UTC2h 4m
2026-07-18 AAL2769 - Jul 18, 23:55 UTCJul 19, 01:35 UTC1h 40m
2026-07-18 AAL2433 RSW → ORD Jul 18, 16:20 UTCJul 18, 19:10 UTC2h 50m
2026-07-18 AAL2433 ORD → RSW Jul 18, 12:20 UTCJul 18, 14:50 UTC2h 30m
2026-07-18 AAL2780 SLC → ORD Jul 18, 05:05 UTCJul 18, 08:05 UTC3h 0m
2026-07-18 AAL2780 SLC → ORD Jul 18, 05:05 UTCJul 18, 08:00 UTC2h 55m
2026-07-18 AAL3133 ORD → SLC Jul 18, 01:05 UTCJul 18, 03:55 UTC2h 51m
2026-07-17 AAL2389 - Jul 17, 20:29 UTCJul 17, 23:20 UTC2h 50m
2026-07-17 AAL2389 - Jul 17, 15:40 UTCJul 17, 19:05 UTC3h 25m
2026-07-17 AAL1509 - Jul 17, 11:15 UTCJul 17, 13:25 UTC2h 10m
2026-07-17 AAL2682 - Jul 17, 02:45 UTCJul 17, 04:29 UTC1h 45m

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 N953AN page for operator, model, and routing details .

Mode-S AD3FD9 frequently asked

What is Mode-S code AD3FD9?
AD3FD9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N953AN.
Where is Mode-S AD3FD9 registered?
Mode-S code AD3FD9 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 AD3FD9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD3FD9, octal 53237731, decimal 11,354,073.
What flights does AD3FD9 operate?
Mode-S AD3FD9 has broadcast 20 distinct callsigns, including AAL2757, AAL1114, AAL1492, AAL1356, AAL3244.