Apparatus

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sensors Mode-S transponder

AD129D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N941TW · CESSNA 172 Skyhawk · operated by HODGE FLIGHT SERVICES LLC

Hex
AD129D
Octal
53211235
Decimal
11,342,493
Country
US
Tail
N941TW
Type
C172
No current signal · last broadcast Jul 25, 18:50 UTC
Flights observed
148
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 18:50 UTC

Last known position

Most recent position reported by Mode-S AD129D.

Country allocation

The ICAO 24-bit address AD129D 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 1 distinct

Callsign Airline Flights Last seen
N941TW - 148 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N941TW CCR → CCR Jul 25, 18:20 UTCJul 25, 18:50 UTC30m
2026-07-25 N941TW CCR → CCR Jul 25, 17:40 UTCJul 25, 18:10 UTC30m
2026-07-25 N941TW CCR → CCR Jul 25, 17:20 UTCJul 25, 17:35 UTC15m
2026-07-24 N941TW - Jul 24, 19:10 UTCJul 24, 20:15 UTC1h 5m
2026-07-23 N941TW CCR → CCR Jul 23, 16:40 UTCJul 23, 18:00 UTC1h 20m
2026-07-23 N941TW CCR → CCR Jul 23, 00:25 UTCJul 23, 01:45 UTC1h 20m
2026-07-22 N941TW - Jul 22, 22:35 UTCJul 22, 23:35 UTC1h 0m
2026-07-22 N941TW - Jul 22, 19:15 UTCJul 22, 20:20 UTC1h 5m
2026-07-22 N941TW CCR → CCR Jul 22, 16:40 UTCJul 22, 17:55 UTC1h 15m
2026-07-22 N941TW CCR → CCR Jul 22, 02:05 UTCJul 22, 03:20 UTC1h 15m
2026-07-22 N941TW - Jul 22, 00:25 UTCJul 22, 01:15 UTC50m
2026-07-21 N941TW CCR → CCR Jul 21, 20:50 UTCJul 21, 21:05 UTC15m
2026-07-21 N941TW CCR → CCR Jul 21, 20:35 UTCJul 21, 20:45 UTC10m
2026-07-21 N941TW - Jul 21, 20:20 UTCJul 21, 20:30 UTC10m
2026-07-21 N941TW CCR → CCR Jul 21, 19:55 UTCJul 21, 20:05 UTC10m
2026-07-21 N941TW CCR → CCR Jul 21, 18:00 UTCJul 21, 18:55 UTC55m
2026-07-21 N941TW CCR → CCR Jul 21, 16:40 UTCJul 21, 17:10 UTC30m
2026-07-21 N941TW - Jul 21, 16:25 UTCJul 21, 16:35 UTC10m
2026-07-21 N941TW CCR → CCR Jul 21, 16:10 UTCJul 21, 16:20 UTC10m
2026-07-21 N941TW CCR → CCR Jul 21, 15:25 UTCJul 21, 16:05 UTC40m
2026-07-20 N941TW CCR → CCR Jul 20, 21:55 UTCJul 20, 23:10 UTC1h 15m
2026-07-20 N941TW CCR → CCR Jul 20, 19:15 UTCJul 20, 20:25 UTC1h 10m
2026-07-18 N941TW CCR → CCR Jul 18, 17:55 UTCJul 18, 19:25 UTC1h 30m
2026-07-18 N941TW - Jul 18, 01:20 UTCJul 18, 01:45 UTC25m
2026-07-18 N941TW - Jul 18, 00:15 UTCJul 18, 01:15 UTC1h 0m
2026-07-17 N941TW CCR → AUN Jul 17, 22:45 UTCJul 17, 23:39 UTC55m
2026-07-17 N941TW - Jul 17, 16:55 UTCJul 17, 17:50 UTC55m
2026-07-16 N941TW CCR → CCR Jul 16, 18:55 UTCJul 16, 20:00 UTC1h 5m
2026-07-16 N941TW CCR → CCR Jul 16, 00:30 UTCJul 16, 00:45 UTC15m
2026-07-15 N941TW - Jul 15, 18:50 UTCJul 15, 20:00 UTC1h 10m
2026-07-15 N941TW CCR → CCR Jul 15, 15:45 UTCJul 15, 17:30 UTC1h 45m
2026-07-14 N941TW CCR → CCR Jul 14, 15:35 UTCJul 14, 17:25 UTC1h 50m
2026-07-13 N941TW CCR → CCR Jul 13, 15:30 UTCJul 13, 17:25 UTC1h 55m
2026-07-10 N941TW CCR → CCR Jul 10, 20:15 UTCJul 10, 21:15 UTC1h 0m
2026-07-10 N941TW CCR → CCR Jul 10, 18:25 UTCJul 10, 19:25 UTC1h 0m
2026-07-10 N941TW CCR → CCR Jul 10, 16:05 UTCJul 10, 17:30 UTC1h 25m
2026-07-09 N941TW CCR → CCR Jul 9, 23:30 UTCJul 10, 01:30 UTC2h 0m
2026-07-09 N941TW CCR → CCR Jul 9, 20:20 UTCJul 9, 21:30 UTC1h 10m
2026-07-09 N941TW CCR → CCR Jul 9, 16:50 UTCJul 9, 17:55 UTC1h 5m
2026-07-07 N941TW CCR → CCR Jul 7, 17:55 UTCJul 7, 19:25 UTC1h 30m
2026-07-07 N941TW CCR → CCR Jul 7, 15:40 UTCJul 7, 17:00 UTC1h 20m
2026-07-07 N941TW CCR → CCR Jul 7, 00:50 UTCJul 7, 01:05 UTC15m
2026-07-07 N941TW CCR → CCR Jul 7, 00:25 UTCJul 7, 00:45 UTC20m
2026-07-07 N941TW CCR → CCR Jul 7, 00:00 UTCJul 7, 00:05 UTC5m
2026-07-06 N941TW CCR → CCR Jul 6, 16:10 UTCJul 6, 17:30 UTC1h 20m
2026-07-05 N941TW CCR → CCR Jul 5, 18:25 UTCJul 5, 19:55 UTC1h 30m
2026-07-05 N941TW CCR → CCR Jul 5, 17:15 UTCJul 5, 17:30 UTC15m
2026-07-04 N941TW CCR → CCR Jul 4, 20:25 UTCJul 4, 22:05 UTC1h 40m
2026-07-04 N941TW CCR → CCR Jul 4, 15:40 UTCJul 4, 16:45 UTC1h 5m
2026-07-03 N941TW CCR → CCR Jul 3, 20:30 UTCJul 3, 22:00 UTC1h 30m

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 N941TW page for operator, model, and routing details .

Mode-S AD129D frequently asked

What is Mode-S code AD129D?
AD129D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N941TW.
Where is Mode-S AD129D registered?
Mode-S code AD129D 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 AD129D broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 18:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD129D, octal 53211235, decimal 11,342,493.
What flights does AD129D operate?
Mode-S AD129D has broadcast 1 distinct callsign, including N941TW.