Apparatus

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sensors Mode-S transponder

A4CE11

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N409AA · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A4CE11
Octal
51147021
Decimal
10,800,657
Country
US
Tail
N409AA
Type
A21N
Transponder active on ground
Flights observed
477
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:10 UTC

Last known position

Most recent position reported by Mode-S A4CE11.

Country allocation

The ICAO 24-bit address A4CE11 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
AAL315 - 9 2026-07-20
AAL3260 - 8 2026-07-02
AAL2820 - 8 2026-07-17
AAL645 American Airlines 7 2026-07-19
AAL144 American Airlines 6 2026-07-20
AAL513 - 5 2026-07-08
AAL3252 American Airlines 5 2026-06-09
AAL31 - 5 2026-07-14
AAL1703 American Airlines 5 2026-06-13
AAL847 - 4 2026-07-13
AAL821 American Airlines 4 2026-05-08
AAL358 American Airlines 4 2026-04-18
AAL3268 - 4 2026-07-07
AAL3239 - 4 2026-07-03
AAL2889 American Airlines 4 2026-04-14
AAL2695 - 4 2026-07-16
AAL246 American Airlines 4 2026-05-15
AAL2177 American Airlines 4 2026-04-19
AAL1709 - 4 2026-06-13
AAL1654 American Airlines 4 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL697 LIH → PHX Jul 26, 18:00 UTCJul 26, 19:10 UTC1h 10m
2026-07-26 AAL1061 DFW → JAX Jul 26, 11:50 UTCJul 26, 15:40 UTC3h 50m
2026-07-26 AAL918 LIM → MIA Jul 26, 03:50 UTCJul 26, 04:00 UTC10m
2026-07-26 AAL918 LIM → MIA Jul 26, 03:19 UTCJul 26, 08:44 UTC5h 25m
2026-07-25 AAL1307 PHL → CHS Jul 25, 20:15 UTCJul 26, 01:00 UTC4h 45m
2026-07-25 AAL2405 ANU → MIA Jul 25, 15:40 UTCJul 25, 17:20 UTC1h 40m
2026-07-25 AAL2405 ANU → MIA Jul 25, 12:30 UTCJul 25, 14:10 UTC1h 40m
2026-07-25 AAL1545 PWM → DCA Jul 25, 06:10 UTCJul 25, 11:05 UTC4h 55m
2026-07-25 AAL1545 PWM → DCA Jul 25, 06:07 UTCJul 25, 11:13 UTC5h 6m
2026-07-24 AAL2663 PHL → SFO Jul 24, 23:05 UTCJul 25, 04:30 UTC5h 25m
2026-07-24 AAL1528 MIA → PHL Jul 24, 15:30 UTCJul 24, 20:05 UTC4h 35m
2026-07-24 AAL1528 MIA → PHL Jul 24, 15:25 UTCJul 24, 19:59 UTC4h 34m
2026-07-23 AAL2160 CUN → LAX Jul 23, 22:30 UTCJul 24, 02:45 UTC4h 15m
2026-07-23 AAL2801 LAX → CUN Jul 23, 16:30 UTCJul 23, 20:55 UTC4h 25m
2026-07-23 AAL607 MSY → CLT Jul 23, 11:10 UTCJul 23, 15:02 UTC3h 52m
2026-07-23 AAL607 MSY → CLT Jul 23, 11:15 UTCJul 23, 12:15 UTC1h 0m
2026-07-23 AAL1543 ORD → SAN Jul 23, 06:05 UTCJul 23, 09:35 UTC3h 30m
2026-07-22 AAL1333 SDF → MIA Jul 22, 23:20 UTCJul 23, 04:20 UTC5h 0m
2026-07-22 AAL779 VGT → PHL Jul 22, 17:30 UTCJul 22, 21:40 UTC4h 10m
2026-07-22 AAL1969 SRQ → ORD Jul 22, 14:00 UTCJul 22, 16:15 UTC2h 15m
2026-07-21 AAL596 LAX → PHL Jul 21, 22:50 UTCJul 22, 02:45 UTC3h 55m
2026-07-21 AAL596 LAX → PHL Jul 21, 22:48 UTCJul 22, 02:42 UTC3h 54m
2026-07-21 AAL1678 - Jul 21, 17:30 UTCJul 21, 20:55 UTC3h 25m
2026-07-21 AAL1362 LAX → PHX Jul 21, 05:10 UTCJul 21, 06:10 UTC1h 0m
2026-07-20 AAL315 - Jul 20, 21:05 UTCJul 21, 01:40 UTC4h 34m
2026-07-20 AAL315 LAX → MIA Jul 20, 21:03 UTCJul 21, 01:39 UTC4h 36m
2026-07-20 AAL315 LAX → MIA Jul 20, 13:50 UTCJul 20, 19:10 UTC5h 20m
2026-07-20 AAL144 HNL → LAX Jul 20, 10:30 UTCJul 20, 11:35 UTC1h 5m
2026-07-20 AAL144 HNL → LAX Jul 20, 06:45 UTCJul 20, 07:05 UTC20m
2026-07-19 AAL143 LAX → HNL Jul 19, 23:05 UTCJul 20, 04:20 UTC5h 15m
2026-07-19 AAL3334 - Jul 19, 18:35 UTCJul 19, 21:05 UTC2h 30m
2026-07-19 AAL1139 RDU → LGA Jul 19, 14:40 UTCJul 19, 16:40 UTC2h 0m
2026-07-19 AAL1139 RDU → LGA Jul 19, 14:39 UTCJul 19, 16:40 UTC2h 1m
2026-07-19 AAL432 OGG → PHX Jul 19, 07:43 UTCJul 19, 13:10 UTC5h 27m
2026-07-19 AAL645 DFW → EWR Jul 19, 00:00 UTCJul 19, 00:15 UTC15m
2026-07-18 AAL645 DFW → EWR Jul 18, 18:15 UTCJul 18, 19:25 UTC1h 10m
2026-07-18 AAL645 DFW → EWR Jul 18, 18:12 UTCJul 19, 00:17 UTC6h 5m
2026-07-18 AAL2315 - Jul 18, 11:25 UTCJul 18, 16:25 UTC5h 0m
2026-07-18 AAL2315 BNH → BNH Jul 18, 10:20 UTCJul 18, 10:25 UTC5m
2026-07-17 AAL366 RDU → LGA Jul 17, 20:29 UTCJul 18, 01:00 UTC4h 30m
2026-07-17 AAL2820 - Jul 17, 14:20 UTCJul 17, 18:29 UTC4h 10m
2026-07-17 AAL2820 PHL → PHL Jul 17, 13:29 UTCJul 17, 13:35 UTC5m
2026-07-17 AAL2764 BOS → PHL Jul 17, 12:11 UTCJul 17, 13:04 UTC53m
2026-07-17 AAL2764 BOS → PHL Jul 17, 12:15 UTCJul 17, 13:05 UTC50m
2026-07-16 AAL366 - Jul 16, 20:15 UTCJul 17, 00:45 UTC4h 30m
2026-07-16 AAL2820 PSQ → PHX Jul 16, 14:25 UTCJul 16, 18:40 UTC4h 15m
2026-07-16 AAL2820 PHL → PHL Jul 16, 13:54 UTCJul 16, 14:00 UTC5m
2026-07-16 AAL2820 PHL → PHL Jul 16, 13:25 UTCJul 16, 13:30 UTC5m
2026-07-16 AAL2820 PHL → PHL Jul 16, 13:05 UTCJul 16, 13:20 UTC15m
2026-07-16 AAL2695 - Jul 16, 08:00 UTCJul 16, 12:49 UTC4h 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 N409AA page for operator, model, and routing details .

Mode-S A4CE11 frequently asked

What is Mode-S code A4CE11?
A4CE11 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N409AA.
Where is Mode-S A4CE11 registered?
Mode-S code A4CE11 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 A4CE11 broadcasting right now?
Mode-S A4CE11 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CE11, octal 51147021, decimal 10,800,657.
What flights does A4CE11 operate?
Mode-S A4CE11 has broadcast 20 distinct callsigns, including AAL315, AAL3260, AAL2820, AAL645, AAL144.