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sensors Mode-S transponder

AD937C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N974LA · operated by TEXTRON AVIATION INC

Hex
AD937C
Octal
53311574
Decimal
11,375,484
Country
US
Tail
N974LA
Type
C408
No current signal · last broadcast 2h ago
Flights observed
116
Distinct callsigns
18
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S AD937C.

Country allocation

The ICAO 24-bit address AD937C 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 18 distinct

Callsign Airline Flights Last seen
STT823 Air St. Thomas 17 2026-05-29
STT422 Air St. Thomas 17 2026-05-29
STT412 Air St. Thomas 16 2026-05-28
STT416 Air St. Thomas 15 2026-05-28
STT817 Air St. Thomas 14 2026-05-27
STT813 Air St. Thomas 14 2026-05-28
STT807 Air St. Thomas 4 2026-05-29
STT414 Air St. Thomas 3 2026-05-29
STT811 Air St. Thomas 2 2026-05-16
STT430 Air St. Thomas 2 2026-05-17
STT426 Air St. Thomas 2 2026-05-17
STT410 Air St. Thomas 2 2026-05-29
STT406 Air St. Thomas 2 2026-05-29
N974LA - 2 2026-04-26
STT974 Air St. Thomas 1 2026-04-30
STT821 Air St. Thomas 1 2026-05-17
STT815 Air St. Thomas 1 2026-05-16
STT420 Air St. Thomas 1 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 STT414 HNL → LNY May 29, 20:05 UTCMay 29, 22:05 UTC2h 0m
2026-05-29 STT410 HNL → LNY May 29, 19:10 UTCMay 29, 19:30 UTC20m
2026-05-29 STT807 LNY → HNL May 29, 18:05 UTCMay 29, 18:30 UTC25m
2026-05-29 STT406 HNL → LNY May 29, 17:05 UTCMay 29, 17:25 UTC20m
2026-05-29 STT823 LNY → HNL May 29, 02:10 UTCMay 29, 02:20 UTC10m
2026-05-29 STT422 HNL → LNY May 29, 01:20 UTCMay 29, 01:35 UTC15m
2026-05-28 STT416 HNL → LNY May 28, 22:15 UTCMay 28, 23:20 UTC1h 5m
2026-05-28 STT813 LNY → HNL May 28, 21:10 UTCMay 28, 21:20 UTC10m
2026-05-28 STT412 HNL → LNY May 28, 20:20 UTCMay 28, 20:35 UTC15m
2026-05-28 STT422 HNL → LNY May 28, 01:40 UTCMay 28, 02:35 UTC55m
2026-05-27 STT817 LNY → HNL May 27, 22:50 UTCMay 27, 23:15 UTC25m
2026-05-27 STT416 HNL → LNY May 27, 21:55 UTCMay 27, 22:20 UTC25m
2026-05-27 STT412 HNL → LNY May 27, 20:10 UTCMay 27, 21:20 UTC1h 10m
2026-05-27 STT823 LNY → HNL May 27, 01:54 UTCMay 27, 02:19 UTC25m
2026-05-27 STT422 HNL → LNY May 27, 00:55 UTCMay 27, 01:14 UTC20m
2026-05-26 STT416 HNL → LNY May 26, 22:20 UTCMay 26, 22:44 UTC25m
2026-05-26 STT412 HNL → LNY May 26, 20:05 UTCMay 26, 21:20 UTC1h 15m
2026-05-26 STT823 LNY → HNL May 26, 01:00 UTCMay 26, 02:10 UTC1h 10m
2026-05-25 STT416 HNL → LNY May 25, 22:10 UTCMay 25, 23:24 UTC1h 15m
2026-05-25 STT813 LNY → HNL May 25, 21:09 UTCMay 25, 21:30 UTC20m
2026-05-25 STT412 HNL → LNY May 25, 19:59 UTCMay 25, 20:24 UTC25m
2026-05-25 STT823 LNY → HNL May 25, 02:00 UTCMay 25, 02:25 UTC25m
2026-05-24 STT817 LNY → HNL May 24, 23:10 UTCMay 24, 23:30 UTC20m
2026-05-24 STT813 LNY → HNL May 24, 21:05 UTCMay 24, 21:30 UTC25m
2026-05-24 STT412 HNL → LNY May 24, 20:05 UTCMay 24, 20:25 UTC20m
2026-05-24 STT823 LNY → HNL May 24, 01:55 UTCMay 24, 02:20 UTC25m
2026-05-24 STT422 HNL → LNY May 24, 01:00 UTCMay 24, 01:20 UTC20m
2026-05-23 STT416 HNL → LNY May 23, 22:30 UTCMay 23, 23:35 UTC1h 5m
2026-05-23 STT412 HNL → LNY May 23, 20:20 UTCMay 23, 21:25 UTC1h 5m
2026-05-23 STT823 LNY → HNL May 23, 01:55 UTCMay 23, 02:25 UTC30m
2026-05-23 STT422 HNL → LNY May 23, 01:00 UTCMay 23, 01:20 UTC20m
2026-05-22 STT817 LNY → HNL May 22, 22:40 UTCMay 22, 23:50 UTC1h 10m
2026-05-22 STT813 LNY → HNL May 22, 21:30 UTCMay 22, 21:50 UTC20m
2026-05-22 STT412 HNL → LNY May 22, 20:20 UTCMay 22, 20:45 UTC25m
2026-05-22 STT823 LNY → HNL May 22, 02:05 UTCMay 22, 02:30 UTC25m
2026-05-22 STT422 HNL → LNY May 22, 01:10 UTCMay 22, 01:30 UTC20m
2026-05-21 STT416 HNL → LNY May 21, 22:20 UTCMay 21, 23:30 UTC1h 10m
2026-05-21 STT813 LNY → HNL May 21, 20:20 UTCMay 21, 21:30 UTC1h 10m
2026-05-21 STT422 HNL → LNY May 21, 01:00 UTCMay 21, 02:10 UTC1h 10m
2026-05-20 STT817 LNY → HNL May 20, 22:10 UTCMay 20, 23:20 UTC1h 10m
2026-05-20 STT412 HNL → LNY May 20, 20:20 UTCMay 20, 21:20 UTC1h 0m
2026-05-17 STT430 HNL → LNY May 17, 05:00 UTCMay 17, 06:00 UTC1h 0m
2026-05-17 STT426 HNL → LNY May 17, 03:05 UTCMay 17, 04:15 UTC1h 10m
2026-05-17 STT821 LNY → HNL May 17, 00:05 UTCMay 17, 01:15 UTC1h 10m
2026-05-16 STT815 LNY → HNL May 16, 21:55 UTCMay 16, 22:20 UTC25m
2026-05-16 STT414 HNL → LNY May 16, 21:05 UTCMay 16, 21:25 UTC20m
2026-05-16 STT811 LNY → HNL May 16, 19:55 UTCMay 16, 20:20 UTC25m
2026-05-16 STT410 HNL → LNY May 16, 18:55 UTCMay 16, 19:20 UTC25m
2026-05-16 STT807 LNY → HNL May 16, 17:10 UTCMay 16, 18:20 UTC1h 10m
2026-05-16 STT823 LNY → HNL May 16, 02:10 UTCMay 16, 02:35 UTC25m

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 N974LA page for operator, model, and routing details .

Mode-S AD937C frequently asked

What is Mode-S code AD937C?
AD937C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N974LA.
Where is Mode-S AD937C registered?
Mode-S code AD937C 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 AD937C broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD937C, octal 53311574, decimal 11,375,484.
What flights does AD937C operate?
Mode-S AD937C has broadcast 18 distinct callsigns, including STT823, STT422, STT412, STT416, STT817.