Apparatus

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sensors Mode-S transponder

A39AF6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N331QT · AIRBUS A-330-200 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A39AF6
Octal
50715366
Decimal
10,722,038
Country
US
Tail
N331QT
Type
A332
No current signal · last broadcast 3h ago
Flights observed
297
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A39AF6.

Country allocation

The ICAO 24-bit address A39AF6 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
TPA4091 - 15 2026-06-29
TNO4269 - 11 2026-07-12
TPA4093 Tampa Cargo 10 2026-06-08
TPA4090 - 9 2026-06-29
TPA4087 Tampa Cargo 9 2026-06-05
TPA4015 - 8 2026-07-06
TNO4260 - 8 2026-07-07
TPA4092 Tampa Cargo 7 2026-06-09
TPA4009 - 7 2026-06-26
TPA4001 - 7 2026-07-03
TNO4276 - 7 2026-07-14
TPA4080 Tampa Cargo 6 2026-06-09
TPA4057 - 6 2026-07-02
TNO4268 - 6 2026-07-12
TPA4202 Tampa Cargo 5 2026-06-27
TPA4069 - 5 2026-07-08
TPA4059 - 5 2026-07-13
TPA4054 Tampa Cargo 5 2026-06-07
TPA4052 - 5 2026-06-22
TPA4045 Tampa Cargo 5 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TNO4276 - Jul 14, 14:35 UTCJul 14, 17:10 UTC2h 35m
2026-07-14 TNO4276 - Jul 14, 00:30 UTCJul 14, 12:25 UTC11h 55m
2026-07-13 TPA4059 - Jul 13, 21:35 UTCJul 13, 22:45 UTC1h 10m
2026-07-13 TPA4095 - Jul 13, 17:20 UTCJul 13, 19:00 UTC1h 40m
2026-07-13 TPA4095 - Jul 13, 07:01 UTCJul 13, 15:25 UTC8h 25m
2026-07-13 TPA4226 - Jul 13, 03:40 UTCJul 13, 04:10 UTC30m
2026-07-12 TPA4088 - Jul 12, 18:20 UTCJul 12, 22:50 UTC4h 30m
2026-07-12 TPA4089 - Jul 12, 09:40 UTCJul 12, 16:30 UTC6h 50m
2026-07-12 TNO4268 - Jul 12, 03:40 UTCJul 12, 06:10 UTC2h 30m
2026-07-12 TNO4269 GUA → SJO Jul 12, 00:15 UTCJul 12, 01:35 UTC1h 20m
2026-07-11 TNO4269 - Jul 11, 19:50 UTCJul 11, 22:10 UTC2h 20m
2026-07-11 TPA4000 - Jul 11, 13:50 UTCJul 11, 17:00 UTC3h 10m
2026-07-10 TPA4277 - Jul 10, 15:40 UTCJul 10, 17:55 UTC2h 15m
2026-07-10 TPA4036 - Jul 10, 02:40 UTCJul 10, 12:25 UTC9h 45m
2026-07-10 TPA4037 - Jul 10, 00:15 UTCJul 10, 00:30 UTC15m
2026-07-09 TPA4220 - Jul 9, 21:50 UTCJul 9, 22:15 UTC25m
2026-07-08 TPA4069 - Jul 8, 12:50 UTCJul 8, 13:55 UTC1h 5m
2026-07-08 TPA4069 - Jul 8, 09:10 UTCJul 8, 11:25 UTC2h 15m
2026-07-08 TNO4274 - Jul 8, 05:45 UTCJul 8, 07:10 UTC1h 25m
2026-07-07 TNO4273 - Jul 7, 22:05 UTCJul 7, 22:35 UTC30m
2026-07-07 TNO7090 - Jul 7, 15:55 UTCJul 7, 18:35 UTC2h 40m
2026-07-07 TNO7091 - Jul 7, 08:25 UTCJul 7, 09:40 UTC1h 15m
2026-07-07 TNO4260 - Jul 7, 04:45 UTCJul 7, 06:05 UTC1h 20m
2026-07-07 TNO4260 - Jul 7, 02:50 UTCJul 7, 03:00 UTC10m
2026-07-06 TNO4260 - Jul 6, 19:55 UTCJul 7, 00:10 UTC4h 15m
2026-07-06 TPA4015 - Jul 6, 16:40 UTCJul 6, 17:05 UTC25m
2026-07-06 TPA4015 - Jul 6, 14:05 UTCJul 6, 14:25 UTC20m
2026-07-06 TPA4014 BOG → MIA Jul 6, 11:20 UTCJul 6, 11:40 UTC20m
2026-07-06 TPA4003 - Jul 6, 04:20 UTCJul 6, 04:35 UTC15m
2026-07-06 TPA4003 - Jul 6, 01:30 UTCJul 6, 01:55 UTC25m
2026-07-05 TPA4200 - Jul 5, 22:45 UTCJul 5, 23:05 UTC20m
2026-07-03 TPA4073 - Jul 3, 18:00 UTCJul 3, 20:10 UTC2h 10m
2026-07-03 TPA4208 - Jul 3, 13:55 UTCJul 3, 14:20 UTC25m
2026-07-03 TPA4001 - Jul 3, 05:40 UTCJul 3, 06:05 UTC25m
2026-07-02 TPA4057 - Jul 2, 10:45 UTCJul 3, 02:20 UTC15h 35m
2026-07-02 TPA4000 - Jul 2, 00:35 UTCJul 2, 01:00 UTC25m
2026-07-01 TPA4000 - Jul 1, 21:00 UTCJul 1, 22:05 UTC1h 5m
2026-07-01 TPA4001 - Jul 1, 12:40 UTCJul 1, 13:05 UTC25m
2026-06-30 TPA4036 MIA → MIA Jun 30, 16:30 UTCJul 1, 04:00 UTC11h 30m
2026-06-29 TPA4090 - Jun 29, 21:54 UTCJun 29, 22:24 UTC30m
2026-06-29 TPA4090 - Jun 29, 15:39 UTCJun 29, 16:04 UTC25m
2026-06-29 TPA4090 - Jun 29, 12:05 UTCJun 29, 12:14 UTC10m
2026-06-29 TPA4091 - Jun 29, 09:10 UTCJun 29, 09:20 UTC10m
2026-06-29 TPA4091 - Jun 29, 07:25 UTCJun 29, 08:04 UTC40m
2026-06-28 TPA4091 - Jun 28, 20:39 UTCJun 29, 05:00 UTC8h 20m
2026-06-28 TPA4082 - Jun 28, 01:44 UTCJun 28, 14:04 UTC12h 20m
2026-06-27 TPA4000 - Jun 27, 15:24 UTCJun 27, 23:39 UTC8h 15m
2026-06-27 TPA4202 BOG → MIA Jun 27, 12:50 UTCJun 27, 13:24 UTC35m
2026-06-26 TPA4009 - Jun 26, 23:15 UTCJun 26, 23:30 UTC15m
2026-06-26 TPA4071 - Jun 26, 09:59 UTCJun 26, 20:50 UTC10h 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 N331QT page for operator, model, and routing details .

Mode-S A39AF6 frequently asked

What is Mode-S code A39AF6?
A39AF6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N331QT.
Where is Mode-S A39AF6 registered?
Mode-S code A39AF6 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 A39AF6 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A39AF6, octal 50715366, decimal 10,722,038.
What flights does A39AF6 operate?
Mode-S A39AF6 has broadcast 20 distinct callsigns, including TPA4091, TNO4269, TPA4093, TPA4090, TPA4087.