Apparatus

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sensors Mode-S transponder

A05940

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N121UW · AIRBUS A-320 · operated by BANK OF UTAH TRUSTEE

Hex
A05940
Octal
50054500
Decimal
10,508,608
Country
US
Tail
N121UW
Type
A320
Broadcasting now · callsign AAL891 · 34,000 ft
Flights observed
569
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Current position

A05940 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A05940 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
AAL2555 American Airlines 11 2026-05-04
AAL2062 American Airlines 11 2026-07-26
AAL2900 American Airlines 10 2026-07-24
AAL2415 - 9 2026-07-14
AAL2336 - 8 2026-07-13
AAL1850 - 8 2026-07-24
AAL1738 - 8 2026-07-07
AAL2879 American Airlines 7 2026-07-23
AAL2682 American Airlines 7 2026-05-12
AAL2496 American Airlines 7 2026-05-05
AAL2330 American Airlines 7 2026-06-05
AAL2033 American Airlines 7 2026-07-23
AAL2018 American Airlines 7 2026-05-01
AAL1785 American Airlines 7 2026-06-02
AAL1311 American Airlines 7 2026-07-22
AAL2386 American Airlines 6 2026-07-22
AAL2348 - 6 2026-06-25
AAL1891 - 6 2026-07-13
AAL1775 - 6 2026-06-26
AAL2962 - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2062 SAT → DFW Jul 26, 18:55 UTCJul 26, 20:50 UTC1h 55m
2026-07-26 AAL2062 SAT → DFW Jul 26, 15:35 UTCJul 26, 17:20 UTC1h 45m
2026-07-26 AAL3305 PHX → CLT Jul 26, 12:05 UTCJul 26, 14:05 UTC2h 0m
2026-07-25 AAL544 DSM → ORD Jul 25, 23:25 UTCJul 26, 01:15 UTC1h 50m
2026-07-25 AAL544 DSM → ORD Jul 25, 23:20 UTCJul 26, 01:12 UTC1h 52m
2026-07-25 AAL2281 DFW → SAT Jul 25, 20:15 UTCJul 25, 22:10 UTC1h 55m
2026-07-25 AAL2281 DFW → SAT Jul 25, 16:20 UTCJul 25, 18:20 UTC2h 0m
2026-07-25 AAL2825 PHX → EWR Jul 25, 13:50 UTCJul 25, 14:50 UTC1h 0m
2026-07-25 AAL3139 AVP → CLT Jul 25, 10:15 UTCJul 25, 11:35 UTC1h 20m
2026-07-25 AAL3139 AVP → CLT Jul 25, 10:14 UTCJul 25, 11:31 UTC1h 17m
2026-07-24 AAL2900 DAB → CLT Jul 24, 22:00 UTCJul 25, 00:00 UTC2h 0m
2026-07-24 AAL2900 DAB → CLT Jul 24, 18:35 UTCJul 24, 20:40 UTC2h 5m
2026-07-24 AAL1850 - Jul 24, 15:00 UTCJul 24, 17:25 UTC2h 25m
2026-07-24 AAL1850 PHL → FLL Jul 24, 11:20 UTCJul 24, 13:55 UTC2h 35m
2026-07-23 AAL2879 DCA → LGA Jul 23, 22:40 UTCJul 23, 23:45 UTC1h 5m
2026-07-23 AAL2879 DCA → LGA Jul 23, 22:36 UTCJul 23, 23:43 UTC1h 7m
2026-07-23 AAL2033 DCA → LGA Jul 23, 19:20 UTCJul 23, 20:55 UTC1h 35m
2026-07-23 AAL2033 DCA → LGA Jul 23, 19:18 UTCJul 23, 20:43 UTC1h 25m
2026-07-23 AAL2033 DCA → LGA Jul 23, 16:25 UTCJul 23, 17:45 UTC1h 20m
2026-07-23 AAL1023 ORD → DCA Jul 23, 12:20 UTCJul 23, 14:10 UTC1h 50m
2026-07-23 AAL2068 LGA → CLT Jul 23, 01:50 UTCJul 23, 03:00 UTC1h 10m
2026-07-23 AAL2068 LGA → CLT Jul 23, 01:45 UTCJul 23, 03:04 UTC1h 19m
2026-07-22 AAL3115 ORD → SFO Jul 22, 22:40 UTCJul 23, 00:30 UTC1h 50m
2026-07-22 AAL3115 ORD → SFO Jul 22, 22:36 UTCJul 23, 00:24 UTC1h 48m
2026-07-22 AAL3115 ORD → SFO Jul 22, 19:40 UTCJul 22, 21:45 UTC2h 5m
2026-07-22 AAL1311 PHX → PHL Jul 22, 16:50 UTCJul 22, 18:20 UTC1h 30m
2026-07-22 AAL2291 PHX → SJC Jul 22, 13:45 UTCJul 22, 14:55 UTC1h 10m
2026-07-22 AAL1581 CLT → LGA Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 AAL2386 PHL → CLT Jul 22, 04:05 UTCJul 22, 05:00 UTC55m
2026-07-22 AAL2386 PHL → CLT Jul 22, 04:01 UTCJul 22, 05:00 UTC59m
2026-07-21 AAL1895 - Jul 21, 23:05 UTCJul 21, 23:25 UTC20m
2026-07-21 AAL1895 - Jul 21, 21:25 UTCJul 21, 21:45 UTC20m
2026-07-21 AAL1781 - Jul 21, 18:30 UTCJul 21, 20:15 UTC1h 45m
2026-07-21 AAL1781 - Jul 21, 15:25 UTCJul 21, 17:05 UTC1h 40m
2026-07-21 AAL1518 - Jul 21, 13:25 UTCJul 21, 14:20 UTC55m
2026-07-21 AAL2281 - Jul 21, 02:00 UTCJul 21, 04:15 UTC2h 15m
2026-07-21 AAL2281 - Jul 21, 01:56 UTCJul 21, 04:04 UTC2h 8m
2026-07-20 AAL2281 - Jul 20, 16:35 UTCJul 20, 18:35 UTC2h 0m
2026-07-20 AAL2825 PHX → EWR Jul 20, 13:40 UTCJul 20, 14:35 UTC55m
2026-07-20 AAL387 DTW → CLT Jul 20, 10:20 UTCJul 20, 11:30 UTC1h 10m
2026-07-20 AAL387 DTW → CLT Jul 20, 10:18 UTCJul 20, 11:27 UTC1h 9m
2026-07-20 AAL419 - Jul 20, 01:30 UTCJul 20, 02:40 UTC1h 10m
2026-07-20 AAL419 CLT → DTW Jul 20, 01:28 UTCJul 20, 02:40 UTC1h 12m
2026-07-19 AAL2182 DCA → CLT Jul 19, 22:15 UTCJul 19, 23:25 UTC1h 10m
2026-07-19 AAL2062 SAT → DFW Jul 19, 19:15 UTCJul 19, 21:00 UTC1h 45m
2026-07-19 AAL2062 SAT → DFW Jul 19, 15:35 UTCJul 19, 17:20 UTC1h 45m
2026-07-18 AAL2062 SAT → DFW Jul 18, 23:25 UTCJul 19, 00:25 UTC1h 0m
2026-07-18 AAL2062 SAT → DFW Jul 18, 23:04 UTCJul 19, 00:35 UTC1h 31m
2026-07-18 AAL2062 SAT → DFW Jul 18, 18:40 UTCJul 18, 21:05 UTC2h 25m
2026-07-18 AAL2062 SAT → DFW Jul 18, 15:35 UTCJul 18, 17:20 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 N121UW page for operator, model, and routing details .

Mode-S A05940 frequently asked

What is Mode-S code A05940?
A05940 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N121UW.
Where is Mode-S A05940 registered?
Mode-S code A05940 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 A05940 broadcasting right now?
Yes. Mode-S A05940 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05940, octal 50054500, decimal 10,508,608.
What flights does A05940 operate?
Mode-S A05940 has broadcast 20 distinct callsigns, including AAL2555, AAL2062, AAL2900, AAL2415, AAL2336.