Apparatus

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sensors Mode-S transponder

AB1839

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N814AA · BOEING 787-8 Dreamliner · operated by AMERICAN AIRLINES INC

Hex
AB1839
Octal
52614071
Decimal
11,212,857
Country
US
Tail
N814AA
Type
B788
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
271
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S AB1839.

Country allocation

The ICAO 24-bit address AB1839 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
AAL115 American Airlines 14 2026-06-10
AAL92 American Airlines 11 2026-07-19
AAL93 American Airlines 10 2026-07-20
AAL759 - 10 2026-07-22
AAL742 American Airlines 10 2026-07-20
AAL6 - 10 2026-06-29
AAL5 American Airlines 10 2026-06-28
AAL41 American Airlines 10 2026-07-21
AAL758 American Airlines 9 2026-07-24
AAL741 American Airlines 9 2026-07-26
AAL722 - 8 2026-07-10
AAL209 - 8 2026-07-11
AAL102 American Airlines 8 2026-06-10
AAL125 - 7 2026-07-17
AAL781 American Airlines 6 2026-07-19
AAL740 - 6 2026-07-17
AAL71 - 6 2026-06-30
AAL150 - 6 2026-07-15
AAL126 American Airlines 6 2026-07-26
AAL70 - 5 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL741 MAD → PHL Jul 26, 13:35 UTCJul 26, 14:40 UTC1h 5m
2026-07-26 AAL741 MAD → PHL Jul 26, 13:34 UTCJul 26, 20:47 UTC7h 13m
2026-07-26 AAL126 ORD → EWR Jul 26, 03:45 UTCJul 26, 11:35 UTC7h 51m
2026-07-25 AAL161 ATH → ORD Jul 25, 09:15 UTCJul 25, 19:55 UTC10h 40m
2026-07-25 AAL161 ATH → ORD Jul 25, 09:11 UTCJul 25, 19:51 UTC10h 40m
2026-07-24 AAL758 PHL → ATH Jul 24, 20:50 UTCJul 25, 05:20 UTC8h 30m
2026-07-24 AAL758 PHL → ATH Jul 24, 20:49 UTCJul 25, 05:19 UTC8h 30m
2026-07-24 AAL97 ORD → SJD Jul 24, 08:30 UTCJul 24, 17:15 UTC8h 45m
2026-07-23 AAL96 BZN → DFW Jul 23, 21:50 UTCJul 24, 05:15 UTC7h 25m
2026-07-23 AAL203 AMS → PHL Jul 23, 08:30 UTCJul 23, 16:05 UTC7h 35m
2026-07-22 AAL204 PHL → AMS Jul 22, 23:15 UTCJul 23, 05:55 UTC6h 40m
2026-07-22 AAL759 - Jul 22, 11:10 UTCJul 22, 20:30 UTC9h 20m
2026-07-21 AAL160 ORD → ATH Jul 21, 22:10 UTCJul 22, 05:25 UTC7h 15m
2026-07-21 AAL41 BCN → ORD Jul 21, 09:30 UTCJul 21, 18:30 UTC9h 0m
2026-07-20 AAL742 PHL → BCN Jul 20, 21:20 UTCJul 21, 04:25 UTC7h 4m
2026-07-20 AAL742 PHL → BCN Jul 20, 21:05 UTCJul 20, 21:10 UTC5m
2026-07-20 AAL93 ZRH → PHL Jul 20, 10:25 UTCJul 20, 18:40 UTC8h 15m
2026-07-20 AAL93 ZRH → PHL Jul 20, 10:25 UTCJul 20, 18:40 UTC8h 15m
2026-07-19 AAL92 PHL → ZRH Jul 19, 23:05 UTCJul 20, 06:10 UTC7h 5m
2026-07-19 AAL92 PHL → ZRH Jul 19, 23:00 UTCJul 20, 06:10 UTC7h 10m
2026-07-19 AAL781 STL → LGA Jul 19, 10:10 UTCJul 19, 19:10 UTC9h 0m
2026-07-19 AAL781 STL → LGA Jul 19, 10:04 UTCJul 19, 19:08 UTC9h 4m
2026-07-18 AAL180 - Jul 18, 23:20 UTCJul 19, 07:45 UTC8h 25m
2026-07-17 AAL125 - Jul 17, 11:55 UTCJul 17, 20:10 UTC8h 15m
2026-07-17 AAL125 MAD → ORD Jul 17, 11:52 UTCJul 17, 20:03 UTC8h 11m
2026-07-17 AAL740 PHL → MAD Jul 17, 02:34 UTCJul 17, 09:04 UTC6h 30m
2026-07-17 AAL740 PHL → PHL Jul 17, 02:20 UTCJul 17, 02:25 UTC5m
2026-07-16 AAL741 - Jul 16, 14:00 UTCJul 16, 21:40 UTC7h 40m
2026-07-16 AAL126 ORD → MAD Jul 16, 03:45 UTCJul 16, 11:45 UTC8h 0m
2026-07-15 AAL151 - Jul 15, 13:05 UTCJul 15, 21:05 UTC8h 0m
2026-07-15 AAL150 ORD → CDG Jul 15, 03:10 UTCJul 15, 10:35 UTC7h 25m
2026-07-14 AAL161 - Jul 14, 08:55 UTCJul 14, 19:30 UTC10h 35m
2026-07-13 AAL758 PHL → ATH Jul 13, 20:55 UTCJul 14, 05:50 UTC8h 55m
2026-07-13 AAL758 PHL → ATH Jul 13, 20:52 UTCJul 14, 05:48 UTC8h 56m
2026-07-13 AAL747 NCE → PHL Jul 13, 08:50 UTCJul 13, 16:50 UTC8h 0m
2026-07-13 AAL747 NCE → PHL Jul 13, 08:49 UTCJul 13, 16:51 UTC8h 2m
2026-07-12 AAL746 - Jul 12, 23:10 UTCJul 13, 06:25 UTC7h 15m
2026-07-12 AAL746 PHL → PHL Jul 12, 22:45 UTCJul 12, 22:50 UTC5m
2026-07-12 AAL723 DUB → PHL Jul 12, 13:55 UTCJul 12, 20:28 UTC6h 33m
2026-07-12 AAL723 - Jul 12, 13:55 UTCJul 12, 14:15 UTC20m
2026-07-12 AAL208 - Jul 12, 06:55 UTCJul 12, 11:40 UTC4h 45m
2026-07-12 AAL208 - Jul 12, 04:40 UTCJul 12, 06:50 UTC2h 10m
2026-07-12 AAL208 ORD → DUB Jul 12, 04:38 UTCJul 12, 11:33 UTC6h 55m
2026-07-11 AAL209 - Jul 11, 08:55 UTCJul 11, 09:40 UTC45m
2026-07-11 AAL209 DUB → ORD Jul 11, 08:54 UTCJul 11, 16:05 UTC7h 11m
2026-07-10 AAL722 PHL → DUB Jul 10, 23:00 UTCJul 11, 04:40 UTC5h 40m
2026-07-10 AAL722 PHL → DUB Jul 10, 23:00 UTCJul 11, 04:45 UTC5h 45m
2026-07-10 AAL9603 - Jul 10, 10:55 UTCJul 10, 19:40 UTC8h 45m
2026-07-10 AAL9603 FCO → PHL Jul 10, 10:51 UTCJul 10, 19:35 UTC8h 44m
2026-07-09 AAL718 - Jul 9, 22:45 UTCJul 10, 06:35 UTC7h 50m

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 N814AA page for operator, model, and routing details .

Mode-S AB1839 frequently asked

What is Mode-S code AB1839?
AB1839 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N814AA.
Where is Mode-S AB1839 registered?
Mode-S code AB1839 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 AB1839 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1839, octal 52614071, decimal 11,212,857.
What flights does AB1839 operate?
Mode-S AB1839 has broadcast 20 distinct callsigns, including AAL115, AAL92, AAL93, AAL759, AAL742.