Apparatus

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sensors Mode-S transponder

ADDB4A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N992NN · BOEING 737-800 · operated by AMERICAN AIRLINES INC

Hex
ADDB4A
Octal
53355512
Decimal
11,393,866
Country
US
Tail
N992NN
Type
B738
Broadcasting now · callsign AAL462 · 38,000 ft
Flights observed
550
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:40 UTC

Current position

ADDB4A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ADDB4A 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
AAL2348 American Airlines 6 2026-05-17
AAL2338 American Airlines 6 2026-06-07
AAL2089 American Airlines 6 2026-06-10
AAL1115 - 6 2026-07-08
AAL2892 - 5 2026-07-14
AAL2744 American Airlines 5 2026-05-16
AAL937 - 4 2026-06-22
AAL766 - 4 2026-06-21
AAL674 American Airlines 4 2026-07-01
AAL348 - 4 2026-04-13
AAL3091 American Airlines 4 2026-07-26
AAL2958 - 4 2026-07-10
AAL2673 American Airlines 4 2026-07-24
AAL2477 - 4 2026-07-14
AAL158 - 4 2026-06-30
AAL1478 - 4 2026-07-07
AAL1363 American Airlines 4 2026-04-29
AAL1160 - 4 2026-06-18
AAL979 American Airlines 3 2026-07-21
AAL928 American Airlines 3 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1049 LAX → PHL Jul 26, 18:20 UTCJul 26, 21:35 UTC3h 15m
2026-07-26 AAL2591 JFK → MBJ Jul 26, 13:55 UTCJul 26, 16:40 UTC2h 45m
2026-07-26 AAL3091 CLT → LGA Jul 26, 03:30 UTCJul 26, 06:10 UTC2h 40m
2026-07-26 AAL3091 CLT → LGA Jul 26, 03:28 UTCJul 26, 06:10 UTC2h 42m
2026-07-25 AAL2926 DFW → TUS Jul 25, 22:55 UTCJul 26, 00:45 UTC1h 50m
2026-07-25 AAL2926 DFW → TUS Jul 25, 20:00 UTCJul 25, 21:40 UTC1h 40m
2026-07-25 AAL1324 DFW → SFO Jul 25, 17:10 UTCJul 25, 18:20 UTC1h 10m
2026-07-25 AAL1324 DFW → SFO Jul 25, 12:17 UTCJul 25, 14:36 UTC2h 19m
2026-07-25 AAL1324 DFW → SFO Jul 25, 12:20 UTCJul 25, 13:20 UTC1h 0m
2026-07-25 AAL1669 MSY → DCA Jul 25, 01:55 UTCJul 25, 04:40 UTC2h 45m
2026-07-24 AAL966 DCA → CLT Jul 24, 22:00 UTCJul 25, 00:30 UTC2h 30m
2026-07-24 AAL966 DCA → CLT Jul 24, 21:56 UTCJul 25, 00:29 UTC2h 33m
2026-07-24 AAL2950 LGA → DCA Jul 24, 19:10 UTCJul 24, 20:40 UTC1h 30m
2026-07-24 AAL2950 LGA → DCA Jul 24, 15:00 UTCJul 24, 16:25 UTC1h 25m
2026-07-24 AAL1091 CLT → PHL Jul 24, 12:20 UTCJul 24, 13:35 UTC1h 15m
2026-07-24 AAL1607 PHX → PHL Jul 24, 05:10 UTCJul 24, 06:05 UTC55m
2026-07-24 AAL2673 DFW → VPS Jul 24, 00:35 UTCJul 24, 02:10 UTC1h 35m
2026-07-23 AAL2673 DFW → VPS Jul 23, 22:05 UTCJul 23, 23:30 UTC1h 25m
2026-07-23 AAL390 MEX → DFW Jul 23, 18:20 UTCJul 23, 20:30 UTC2h 10m
2026-07-23 AAL389 DFW → MEX Jul 23, 16:10 UTCJul 23, 16:15 UTC5m
2026-07-23 AAL389 DFW → MEX Jul 23, 14:10 UTCJul 23, 15:35 UTC1h 25m
2026-07-23 AAL2540 OMA → DFW Jul 23, 10:45 UTCJul 23, 12:10 UTC1h 25m
2026-07-23 AAL2628 DFW → OMA Jul 23, 03:32 UTCJul 23, 04:49 UTC1h 17m
2026-07-23 AAL2628 DFW → OMA Jul 23, 03:35 UTCJul 23, 04:50 UTC1h 15m
2026-07-22 AAL1438 BOS → DFW Jul 22, 23:00 UTCJul 23, 02:20 UTC3h 20m
2026-07-22 AAL1438 BOS → DFW Jul 22, 18:45 UTCJul 22, 21:40 UTC2h 55m
2026-07-22 AAL2851 EWR → CLT Jul 22, 16:00 UTCJul 22, 16:50 UTC50m
2026-07-22 AAL2851 EWR → CLT Jul 22, 14:00 UTCJul 22, 14:35 UTC35m
2026-07-22 AAL2770 ATL → DFW Jul 22, 11:10 UTCJul 22, 12:00 UTC50m
2026-07-22 AAL2749 DFW → ATL Jul 22, 02:25 UTCJul 22, 04:05 UTC1h 40m
2026-07-22 AAL2749 DFW → ATL Jul 22, 02:24 UTCJul 22, 04:07 UTC1h 43m
2026-07-21 AAL1496 PHL → SJU Jul 21, 23:45 UTCJul 22, 01:05 UTC1h 20m
2026-07-21 AAL1496 PHL → SJU Jul 21, 23:40 UTCJul 22, 01:10 UTC1h 30m
2026-07-21 AAL1484 SAT → ORD Jul 21, 18:05 UTCJul 21, 21:50 UTC3h 45m
2026-07-21 AAL1943 - Jul 21, 11:40 UTCJul 21, 16:00 UTC4h 20m
2026-07-21 AAL979 PHL → LAS Jul 21, 03:55 UTCJul 21, 04:30 UTC35m
2026-07-20 AAL979 PHL → LAS Jul 20, 23:05 UTCJul 21, 01:55 UTC2h 49m
2026-07-20 AAL2400 - Jul 20, 19:00 UTCJul 20, 21:25 UTC2h 25m
2026-07-20 AAL2400 DFW → RDU Jul 20, 14:55 UTCJul 20, 17:15 UTC2h 20m
2026-07-20 AAL1296 - Jul 20, 11:35 UTCJul 20, 13:20 UTC1h 45m
2026-07-20 AAL2518 - Jul 20, 01:40 UTCJul 20, 04:00 UTC2h 20m
2026-07-19 AAL409 DFW → MIA Jul 19, 16:35 UTCJul 19, 23:45 UTC7h 10m
2026-07-19 AAL2190 ORD → FLL Jul 19, 01:40 UTCJul 19, 14:50 UTC13h 10m
2026-07-18 AAL1441 CLT → BOS Jul 18, 20:40 UTCJul 18, 23:50 UTC3h 10m
2026-07-18 AAL1822 MIA → EWR Jul 18, 12:45 UTCJul 18, 15:20 UTC2h 35m
2026-07-18 AAL1822 MIA → EWR Jul 18, 12:45 UTCJul 18, 15:18 UTC2h 33m
2026-07-18 AAL1088 - Jul 18, 09:15 UTCJul 18, 10:55 UTC1h 40m
2026-07-18 AAL1286 - Jul 18, 02:55 UTCJul 18, 04:35 UTC1h 40m
2026-07-17 AAL2963 MBJ → MIA Jul 17, 23:10 UTCJul 18, 00:24 UTC1h 14m
2026-07-17 AAL2890 - Jul 17, 18:34 UTCJul 17, 20:44 UTC2h 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 N992NN page for operator, model, and routing details .

Mode-S ADDB4A frequently asked

What is Mode-S code ADDB4A?
ADDB4A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N992NN.
Where is Mode-S ADDB4A registered?
Mode-S code ADDB4A 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 ADDB4A broadcasting right now?
Yes. Mode-S ADDB4A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADDB4A, octal 53355512, decimal 11,393,866.
What flights does ADDB4A operate?
Mode-S ADDB4A has broadcast 20 distinct callsigns, including AAL2348, AAL2338, AAL2089, AAL1115, AAL2892.