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 Jul 26, 21:30 UTC
Flights observed
341
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

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 Tampa Cargo 16 2026-07-26
TPA4093 Tampa Cargo 15 2026-07-26
TNO4269 - 13 2026-07-15
TPA4092 Tampa Cargo 12 2026-07-26
TPA4090 - 9 2026-06-29
TPA4087 Tampa Cargo 9 2026-06-05
TPA4059 Tampa Cargo 8 2026-07-24
TPA4015 - 8 2026-07-06
TNO4260 - 8 2026-07-07
TPA4089 Tampa Cargo 7 2026-07-17
TPA4045 Tampa Cargo 7 2026-07-19
TPA4009 - 7 2026-06-26
TPA4001 - 7 2026-07-03
TNO4276 - 7 2026-07-14
TNO4268 - 7 2026-07-15
TPA4099 Tampa Cargo 6 2026-07-21
TPA4080 Tampa Cargo 6 2026-06-09
TPA4057 - 6 2026-07-02
TPA4052 Tampa Cargo 6 2026-07-24
TPA4202 Tampa Cargo 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TPA4091 MVD → EZE Jul 26, 17:25 UTCJul 26, 21:30 UTC4h 5m
2026-07-26 TPA4092 SCL → MIA Jul 26, 10:40 UTCJul 26, 15:00 UTC4h 20m
2026-07-26 TPA4093 MIA → MVD Jul 26, 04:10 UTCJul 26, 04:20 UTC10m
2026-07-26 TPA4093 MIA → MVD Jul 26, 02:00 UTCJul 26, 03:00 UTC1h 0m
2026-07-26 TPA4093 MIA → MVD Jul 26, 00:15 UTCJul 26, 00:25 UTC10m
2026-07-25 TPA4093 MIA → MVD Jul 25, 17:50 UTCJul 25, 20:30 UTC2h 40m
2026-07-25 TPA4093 MIA → MVD Jul 25, 16:05 UTCJul 25, 16:25 UTC20m
2026-07-25 TPA4200 BOG → MIA Jul 25, 10:10 UTCJul 25, 13:15 UTC3h 5m
2026-07-25 TPA4201 MIA → BOG Jul 25, 04:50 UTCJul 25, 07:30 UTC2h 40m
2026-07-25 TPA4220 MDE → MIA Jul 25, 00:05 UTCJul 25, 03:00 UTC2h 55m
2026-07-24 TPA4052 VCP → BOG Jul 24, 14:55 UTCJul 24, 20:15 UTC5h 20m
2026-07-24 TPA4059 VCP → VIX Jul 24, 13:10 UTCJul 24, 13:30 UTC20m
2026-07-24 TPA4059 VCP → VIX Jul 24, 10:45 UTCJul 24, 11:15 UTC30m
2026-07-24 TPA4059 VCP → VIX Jul 24, 01:15 UTCJul 24, 09:15 UTC8h 0m
2026-07-23 TPA4278 - Jul 23, 12:15 UTCJul 23, 19:10 UTC6h 55m
2026-07-23 TPA4053 - Jul 23, 01:20 UTCJul 23, 03:40 UTC2h 20m
2026-07-22 TPA4053 - Jul 22, 20:45 UTCJul 22, 22:35 UTC1h 50m
2026-07-22 TPA4030 UIO → MIA Jul 22, 15:30 UTCJul 22, 18:35 UTC3h 5m
2026-07-22 TPA4031 MIA → UIO Jul 22, 11:55 UTCJul 22, 12:10 UTC15m
2026-07-21 TPA4092 SCL → MIA Jul 21, 11:05 UTCJul 21, 17:35 UTC6h 30m
2026-07-21 TPA4099 MIA → EZE Jul 21, 09:10 UTCJul 21, 09:35 UTC25m
2026-07-20 TPA4099 MIA → EZE Jul 20, 23:35 UTCJul 21, 06:10 UTC6h 34m
2026-07-20 TPA4099 MIA → EZE Jul 20, 21:50 UTCJul 20, 22:10 UTC20m
2026-07-20 TPA4216 BOG → MIA Jul 20, 12:05 UTCJul 20, 15:10 UTC3h 5m
2026-07-20 TPA4019 - Jul 20, 06:35 UTCJul 20, 09:40 UTC3h 5m
2026-07-19 TPA4092 SCL → MIA Jul 19, 22:50 UTCJul 20, 03:50 UTC5h 0m
2026-07-19 TPA4045 MIA → AGT Jul 19, 15:10 UTCJul 19, 16:50 UTC1h 40m
2026-07-19 TPA4045 MIA → AGT Jul 19, 05:25 UTCJul 19, 12:35 UTC7h 10m
2026-07-18 TPA4098 - Jul 18, 21:00 UTCJul 19, 02:05 UTC5h 5m
2026-07-18 TPA4043 MIA → LIM Jul 18, 15:45 UTCJul 18, 15:55 UTC10m
2026-07-18 TPA4043 MIA → LIM Jul 18, 01:30 UTCJul 18, 08:35 UTC7h 6m
2026-07-17 TPA4096 SCL → MIA Jul 17, 18:05 UTCJul 17, 23:10 UTC5h 5m
2026-07-17 TPA4089 ASU → VCP Jul 17, 12:35 UTCJul 17, 12:50 UTC15m
2026-07-17 TPA4089 ASU → VCP Jul 17, 10:30 UTCJul 17, 11:55 UTC1h 25m
2026-07-17 TPA4089 ASU → VCP Jul 17, 00:40 UTCJul 17, 07:30 UTC6h 50m
2026-07-16 TPA4092 - Jul 16, 15:19 UTCJul 16, 20:15 UTC4h 55m
2026-07-16 TPA4092 - Jul 16, 12:14 UTCJul 16, 12:25 UTC10m
2026-07-16 TPA4085 - Jul 16, 07:35 UTCJul 16, 08:55 UTC1h 20m
2026-07-15 TPA4085 - Jul 15, 22:45 UTCJul 16, 05:30 UTC6h 45m
2026-07-15 TNO4268 - Jul 15, 17:10 UTCJul 15, 19:30 UTC2h 20m
2026-07-15 TNO4269 GUA → SJO Jul 15, 13:50 UTCJul 15, 15:05 UTC1h 15m
2026-07-15 TNO4269 - Jul 15, 10:05 UTCJul 15, 12:15 UTC2h 10m
2026-07-15 TNO4274 SJO → MIA Jul 15, 02:50 UTCJul 15, 07:35 UTC4h 45m
2026-07-14 TNO4273 - Jul 14, 22:25 UTCJul 15, 01:00 UTC2h 34m
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

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 Jul 26, 21:30 UTC.
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, TPA4093, TNO4269, TPA4092, TPA4090.