Apparatus

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sensors Mode-S transponder

A94D20

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N699LA · PILATUS PC-12 · operated by TVPX AIRCRAFT SOLUTIONS INC TRUSTEE

Hex
A94D20
Octal
52246440
Decimal
11,095,328
Country
US
Tail
N699LA
Type
PC12
No current signal · last broadcast 8h ago
Flights observed
94
Distinct callsigns
20
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A94D20.

Country allocation

The ICAO 24-bit address A94D20 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
STT72 - 9 2026-04-16
STT936 - 6 2026-07-11
STT74 Air St. Thomas 6 2026-06-10
STT937 - 5 2026-07-11
STT795 - 4 2026-06-17
STT694 - 4 2026-07-14
STT690 - 4 2026-07-12
STT692 - 3 2026-07-12
STT935 - 2 2026-07-13
STT934 - 2 2026-07-11
STT932 Air St. Thomas 2 2026-07-12
STT70 - 2 2026-07-10
STT4793 - 2 2026-06-30
STT208 - 2 2026-07-01
STT2002 Air St. Thomas 2 2026-07-02
STT938 - 1 2026-07-09
STT933 Air St. Thomas 1 2026-07-12
STT791 - 1 2026-07-01
STT765 - 1 2026-07-11
STT763 Air St. Thomas 1 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 STT640 - Jul 14, 02:10 UTCJul 14, 03:05 UTC55m
2026-07-14 STT694 - Jul 14, 00:10 UTCJul 14, 01:05 UTC55m
2026-07-13 STT935 - Jul 13, 01:35 UTCJul 13, 02:01 UTC25m
2026-07-12 STT694 - Jul 12, 23:50 UTCJul 13, 00:35 UTC45m
2026-07-12 STT5793 - Jul 12, 21:05 UTCJul 12, 21:25 UTC20m
2026-07-12 STT692 - Jul 12, 20:01 UTCJul 12, 20:20 UTC20m
2026-07-12 STT933 MKK → HNL Jul 12, 18:15 UTCJul 12, 18:40 UTC25m
2026-07-12 STT932 HNL → MKK Jul 12, 17:15 UTCJul 12, 17:40 UTC25m
2026-07-12 STT331 - Jul 12, 05:45 UTCJul 12, 06:10 UTC25m
2026-07-12 STT690 - Jul 12, 03:15 UTCJul 12, 03:35 UTC20m
2026-07-12 STT648 - Jul 12, 01:15 UTCJul 12, 02:20 UTC1h 5m
2026-07-11 STT642 - Jul 11, 23:25 UTCJul 12, 00:25 UTC1h 0m
2026-07-11 STT937 - Jul 11, 22:35 UTCJul 11, 22:50 UTC15m
2026-07-11 STT936 - Jul 11, 21:35 UTCJul 11, 21:55 UTC20m
2026-07-11 STT765 - Jul 11, 04:25 UTCJul 11, 04:45 UTC20m
2026-07-11 STT934 - Jul 11, 03:05 UTCJul 11, 03:50 UTC45m
2026-07-11 STT748 - Jul 11, 01:05 UTCJul 11, 02:05 UTC1h 0m
2026-07-10 STT763 LNY → HNL Jul 10, 21:50 UTCJul 10, 22:50 UTC1h 0m
2026-07-10 STT932 HNL → MKK Jul 10, 16:40 UTCJul 10, 20:40 UTC4h 0m
2026-07-10 STT70 - Jul 10, 01:05 UTCJul 10, 01:40 UTC35m
2026-07-09 STT4023 OGG → HNL Jul 9, 20:55 UTCJul 9, 21:20 UTC25m
2026-07-09 STT938 - Jul 9, 18:15 UTCJul 9, 19:05 UTC50m
2026-07-09 STT936 - Jul 9, 17:00 UTCJul 9, 17:20 UTC20m
2026-07-08 STT3003 LNY → HNL Jul 8, 20:10 UTCJul 8, 20:30 UTC20m
2026-07-08 STT690 - Jul 8, 19:05 UTCJul 8, 19:25 UTC20m
2026-07-08 STT937 - Jul 8, 18:10 UTCJul 8, 18:30 UTC20m
2026-07-08 STT936 - Jul 8, 16:50 UTCJul 8, 17:05 UTC15m
2026-07-05 STT1011 - Jul 5, 23:00 UTCJul 5, 23:30 UTC30m
2026-07-05 STT5795 - Jul 5, 21:55 UTCJul 5, 22:20 UTC25m
2026-07-05 STT5002 - Jul 5, 21:00 UTCJul 5, 21:25 UTC25m
2026-07-05 STT690 - Jul 5, 19:55 UTCJul 5, 20:10 UTC15m
2026-07-04 STT4795 - Jul 4, 23:00 UTCJul 4, 23:25 UTC25m
2026-07-04 STT1041 - Jul 4, 21:25 UTCJul 4, 22:30 UTC1h 5m
2026-07-04 STT1031 - Jul 4, 20:05 UTCJul 4, 20:25 UTC20m
2026-07-03 STT5033 - Jul 3, 22:30 UTCJul 3, 23:10 UTC40m
2026-07-03 STT5024 - Jul 3, 21:40 UTCJul 3, 22:05 UTC25m
2026-07-03 STT690 - Jul 3, 20:45 UTCJul 3, 21:05 UTC20m
2026-07-03 STT1765 - Jul 3, 00:50 UTCJul 3, 01:20 UTC30m
2026-07-02 STT2002 HNL → LNY Jul 2, 22:40 UTCJul 2, 23:00 UTC20m
2026-07-02 STT694 - Jul 2, 00:30 UTCJul 2, 01:20 UTC50m
2026-07-01 STT5032 - Jul 1, 21:00 UTCJul 1, 22:10 UTC1h 10m
2026-07-01 STT5690 - Jul 1, 19:50 UTCJul 1, 20:35 UTC45m
2026-07-01 STT309 - Jul 1, 18:55 UTCJul 1, 19:15 UTC20m
2026-07-01 STT208 - Jul 1, 18:05 UTCJul 1, 18:25 UTC20m
2026-07-01 STT791 - Jul 1, 02:00 UTCJul 1, 02:20 UTC20m
2026-07-01 STT1048 - Jul 1, 01:05 UTCJul 1, 01:30 UTC25m
2026-06-30 STT4793 - Jun 30, 22:05 UTCJun 30, 22:35 UTC30m
2026-06-30 STT692 HNL → LNY Jun 30, 20:30 UTCJun 30, 21:20 UTC50m
2026-06-30 STT937 LNY → HNL Jun 30, 18:25 UTCJun 30, 18:40 UTC15m
2026-06-30 STT936 HNL → LNY Jun 30, 17:20 UTCJun 30, 17:35 UTC15m

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 N699LA page for operator, model, and routing details .

Mode-S A94D20 frequently asked

What is Mode-S code A94D20?
A94D20 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N699LA.
Where is Mode-S A94D20 registered?
Mode-S code A94D20 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 A94D20 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A94D20, octal 52246440, decimal 11,095,328.
What flights does A94D20 operate?
Mode-S A94D20 has broadcast 20 distinct callsigns, including STT72, STT936, STT74, STT937, STT795.