Apparatus

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sensors Mode-S transponder

AA7439

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N773AN · BOEING 777-200 · operated by AMERICAN AIRLINES INC

Hex
AA7439
Octal
52472071
Decimal
11,170,873
Country
US
Tail
N773AN
Type
B772
No current signal · last broadcast 13h ago
Flights observed
235
Distinct callsigns
20
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S AA7439.

Country allocation

The ICAO 24-bit address AA7439 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
AAL784 American Airlines 12 2026-06-14
AAL705 - 12 2026-06-13
AAL785 - 11 2026-06-15
AAL787 - 10 2026-07-01
AAL704 American Airlines 9 2026-06-12
AAL69 American Airlines 8 2026-05-22
AAL52 - 8 2026-06-27
AAL174 American Airlines 8 2026-05-20
AAL905 American Airlines 6 2026-06-04
AAL60 American Airlines 6 2026-07-08
AAL42 - 6 2026-06-30
AAL173 American Airlines 6 2026-05-19
AAL904 American Airlines 5 2026-06-05
AAL786 - 5 2026-07-03
AAL748 American Airlines 5 2026-05-29
AAL61 - 5 2026-07-07
AAL56 American Airlines 5 2026-05-19
AAL53 American Airlines 5 2026-05-31
AAL112 American Airlines 5 2026-06-16
AAL931 American Airlines 4 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AAL333 ATH → JFK Jul 13, 15:05 UTCJul 14, 00:50 UTC9h 45m
2026-07-13 AAL333 ATH → JFK Jul 13, 15:01 UTCJul 14, 00:51 UTC9h 50m
2026-07-12 AAL326 - Jul 12, 23:15 UTCJul 13, 08:55 UTC9h 40m
2026-07-12 AAL326 CLT → ATH Jul 12, 23:12 UTCJul 13, 08:55 UTC9h 43m
2026-07-12 AAL725 - Jul 12, 11:35 UTCJul 12, 18:50 UTC7h 15m
2026-07-12 AAL724 - Jul 12, 01:55 UTCJul 12, 08:30 UTC6h 35m
2026-07-11 AAL725P - Jul 11, 19:30 UTCJul 11, 20:00 UTC30m
2026-07-10 AAL725 DUB → RDU Jul 10, 12:30 UTCJul 10, 20:55 UTC8h 25m
2026-07-10 AAL132 - Jul 10, 01:20 UTCJul 10, 09:25 UTC8h 5m
2026-07-09 AAL133 - Jul 9, 12:30 UTCJul 9, 21:25 UTC8h 55m
2026-07-09 AAL132 DFW → DUB Jul 9, 02:00 UTCJul 9, 10:08 UTC8h 8m
2026-07-09 AAL132 - Jul 9, 02:00 UTCJul 9, 05:45 UTC3h 45m
2026-07-08 AAL60 NRT → DFW Jul 8, 09:40 UTCJul 8, 20:45 UTC11h 5m
2026-07-07 AAL61 DFW → NRT Jul 7, 17:20 UTCJul 8, 06:25 UTC13h 5m
2026-07-03 AAL49 - Jul 3, 11:15 UTCJul 3, 21:15 UTC10h 0m
2026-07-03 AAL786 - Jul 3, 00:40 UTCJul 3, 08:20 UTC7h 40m
2026-07-01 AAL787 - Jul 1, 09:30 UTCJul 1, 10:15 UTC45m
2026-07-01 AAL787 CDG → CLT Jul 1, 09:28 UTCJul 1, 17:57 UTC8h 29m
2026-06-30 AAL42 - Jun 30, 22:10 UTCJul 1, 04:35 UTC6h 25m
2026-06-30 AAL42 JFK → CDG Jun 30, 22:06 UTCJul 1, 04:31 UTC6h 25m
2026-06-29 AAL333 - Jun 29, 14:09 UTCJun 29, 18:14 UTC4h 5m
2026-06-29 AAL333 ATH → JFK Jun 29, 14:08 UTCJun 30, 00:01 UTC9h 53m
2026-06-29 AAL326 - Jun 29, 02:05 UTCJun 29, 11:55 UTC9h 50m
2026-06-29 AAL326 CLT → ATH Jun 29, 02:01 UTCJun 29, 11:55 UTC9h 54m
2026-06-28 AAL721 - Jun 28, 11:59 UTCJun 28, 21:34 UTC9h 35m
2026-06-28 AAL721 FCO → CLT Jun 28, 11:55 UTCJun 28, 21:33 UTC9h 38m
2026-06-27 AAL52 - Jun 27, 23:29 UTCJun 28, 06:15 UTC6h 45m
2026-06-27 AAL52 MIA → FCO Jun 27, 23:25 UTCJun 28, 08:48 UTC9h 23m
2026-06-26 AAL488 - Jun 26, 22:05 UTCJun 26, 23:30 UTC1h 25m
2026-06-26 AAL787 - Jun 26, 11:09 UTCJun 26, 19:35 UTC8h 25m
2026-06-25 AAL48 DFW → CDG Jun 25, 23:30 UTCJun 26, 08:10 UTC8h 40m
2026-06-25 AAL60 NRT → DFW Jun 25, 10:00 UTCJun 25, 20:59 UTC10h 59m
2026-06-25 AAL60 NRT → DFW Jun 25, 10:04 UTCJun 25, 21:05 UTC11h 0m
2026-06-24 AAL61 DFW → NRT Jun 24, 17:14 UTCJun 25, 05:55 UTC12h 40m
2026-06-23 AAL60 NRT → DFW Jun 23, 09:40 UTCJun 23, 20:40 UTC11h 0m
2026-06-22 AAL61 DFW → NRT Jun 22, 17:18 UTCJun 23, 05:39 UTC12h 21m
2026-06-22 AAL61 DFW → NRT Jun 22, 17:20 UTCJun 23, 05:49 UTC12h 30m
2026-06-22 AAL116 - Jun 22, 07:45 UTCJun 22, 10:30 UTC2h 45m
2026-06-21 AAL123 - Jun 21, 18:00 UTCJun 21, 20:54 UTC2h 55m
2026-06-20 AAL133 DUB → DFW Jun 20, 13:43 UTCJun 20, 22:39 UTC8h 56m
2026-06-20 AAL133 DUB → DFW Jun 20, 13:44 UTCJun 20, 22:14 UTC8h 30m
2026-06-19 AAL724P CLT → DUB Jun 19, 23:04 UTCJun 20, 06:10 UTC7h 5m
2026-06-18 AAL787 - Jun 18, 09:30 UTCJun 18, 17:55 UTC8h 25m
2026-06-18 AAL787 CDG → CLT Jun 18, 09:27 UTCJun 18, 17:55 UTC8h 28m
2026-06-17 AAL42 JFK → CDG Jun 17, 22:43 UTCJun 18, 05:26 UTC6h 43m
2026-06-17 AAL42 JFK → CDG Jun 17, 22:45 UTCJun 18, 05:30 UTC6h 45m
2026-06-17 AAL67 BCN → JFK Jun 17, 11:50 UTCJun 17, 19:25 UTC7h 35m
2026-06-17 AAL67 BCN → JFK Jun 17, 11:47 UTCJun 17, 19:27 UTC7h 40m
2026-06-16 AAL112 MIA → BCN Jun 16, 23:35 UTCJun 17, 08:05 UTC8h 30m
2026-06-16 AAL112 MIA → BCN Jun 16, 23:30 UTCJun 17, 08:07 UTC8h 37m

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 N773AN page for operator, model, and routing details .

Mode-S AA7439 frequently asked

What is Mode-S code AA7439?
AA7439 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N773AN.
Where is Mode-S AA7439 registered?
Mode-S code AA7439 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 AA7439 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA7439, octal 52472071, decimal 11,170,873.
What flights does AA7439 operate?
Mode-S AA7439 has broadcast 20 distinct callsigns, including AAL784, AAL705, AAL785, AAL787, AAL704.