Apparatus

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sensors Mode-S transponder

A172D3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1926R · operated by TEXTRON AVIATION INC

Hex
A172D3
Octal
50271323
Decimal
10,580,691
Country
US
Tail
N1926R
Type
C172
No current signal · last broadcast 29d ago
Flights observed
163
Distinct callsigns
1
Country
US
Last broadcast
29d ago

Last known position

Most recent position reported by Mode-S A172D3.

Country allocation

The ICAO 24-bit address A172D3 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
ERU1 - 163 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 ERU1 - Jul 16, 20:09 UTCJul 16, 22:10 UTC2h 0m
2026-07-15 ERU1 - Jul 15, 21:05 UTCJul 15, 22:55 UTC1h 50m
2026-07-15 ERU1 - Jul 15, 17:10 UTCJul 15, 19:55 UTC2h 45m
2026-07-15 ERU1 - Jul 15, 11:40 UTCJul 15, 14:45 UTC3h 5m
2026-07-04 ERU1 - Jul 4, 12:30 UTCJul 4, 14:00 UTC1h 30m
2026-07-04 ERU1 - Jul 4, 04:40 UTCJul 4, 06:15 UTC1h 35m
2026-07-04 ERU1 - Jul 4, 01:45 UTCJul 4, 02:20 UTC35m
2026-07-03 ERU1 - Jul 3, 12:25 UTCJul 3, 14:10 UTC1h 45m
2026-07-03 ERU1 - Jul 3, 00:50 UTCJul 3, 02:05 UTC1h 15m
2026-07-02 ERU1 - Jul 2, 15:55 UTCJul 2, 17:15 UTC1h 20m
2026-07-02 ERU1 - Jul 2, 10:45 UTCJul 2, 13:40 UTC2h 55m
2026-07-01 ERU1 - Jul 1, 13:10 UTCJul 1, 14:15 UTC1h 5m
2026-07-01 ERU1 - Jul 1, 10:20 UTCJul 1, 11:25 UTC1h 5m
2026-07-01 ERU1 - Jul 1, 01:00 UTCJul 1, 02:05 UTC1h 5m
2026-06-30 ERU1 - Jun 30, 18:05 UTCJun 30, 19:20 UTC1h 15m
2026-06-30 ERU1 - Jun 30, 13:40 UTCJun 30, 14:15 UTC35m
2026-06-30 ERU1 - Jun 30, 12:35 UTCJun 30, 13:10 UTC35m
2026-06-29 ERU1 - Jun 29, 15:14 UTCJun 29, 15:34 UTC20m
2026-06-29 ERU1 - Jun 29, 11:29 UTCJun 29, 13:04 UTC1h 35m
2026-06-28 ERU1 - Jun 28, 22:29 UTCJun 28, 23:34 UTC1h 5m
2026-06-28 ERU1 - Jun 28, 14:39 UTCJun 28, 15:14 UTC35m
2026-06-28 ERU1 - Jun 28, 11:50 UTCJun 28, 13:25 UTC1h 35m
2026-06-27 ERU1 - Jun 27, 15:45 UTCJun 27, 17:20 UTC1h 35m
2026-06-18 ERU1 - Jun 18, 18:55 UTCJun 18, 20:35 UTC1h 40m
2026-06-18 ERU1 - Jun 18, 15:05 UTCJun 18, 16:55 UTC1h 50m
2026-06-18 ERU1 - Jun 18, 11:00 UTCJun 18, 12:55 UTC1h 55m
2026-06-18 ERU1 - Jun 18, 02:10 UTCJun 18, 02:55 UTC45m
2026-06-18 ERU1 - Jun 18, 01:10 UTCJun 18, 01:25 UTC15m
2026-06-17 ERU1 - Jun 17, 21:35 UTCJun 17, 23:25 UTC1h 50m
2026-06-17 ERU1 - Jun 17, 16:30 UTCJun 17, 17:30 UTC1h 0m
2026-06-17 ERU1 - Jun 17, 13:20 UTCJun 17, 14:15 UTC55m
2026-06-15 ERU1 - Jun 15, 15:15 UTCJun 15, 16:04 UTC50m
2026-06-15 ERU1 - Jun 15, 10:24 UTCJun 15, 11:39 UTC1h 15m
2026-06-14 ERU1 - Jun 14, 16:25 UTCJun 14, 16:40 UTC15m
2026-06-14 ERU1 - Jun 14, 13:00 UTCJun 14, 13:20 UTC20m
2026-06-13 ERU1 - Jun 13, 20:30 UTCJun 13, 22:15 UTC1h 45m
2026-06-13 ERU1 - Jun 13, 13:05 UTCJun 13, 14:10 UTC1h 5m
2026-06-13 ERU1 - Jun 13, 10:25 UTCJun 13, 11:40 UTC1h 15m
2026-06-12 ERU1 - Jun 12, 13:40 UTCJun 12, 14:25 UTC45m
2026-06-12 ERU1 - Jun 12, 10:40 UTCJun 12, 11:55 UTC1h 15m
2026-06-12 ERU1 - Jun 12, 02:45 UTCJun 12, 04:15 UTC1h 30m
2026-06-11 ERU1 - Jun 11, 19:50 UTCJun 11, 20:35 UTC45m
2026-06-11 ERU1 - Jun 11, 17:00 UTCJun 11, 18:15 UTC1h 15m
2026-06-11 ERU1 - Jun 11, 14:15 UTCJun 11, 14:30 UTC15m
2026-06-11 ERU1 - Jun 11, 13:15 UTCJun 11, 13:35 UTC20m
2026-06-10 ERU1 - Jun 10, 22:25 UTCJun 10, 23:40 UTC1h 15m
2026-06-10 ERU1 - Jun 10, 20:00 UTCJun 10, 20:40 UTC40m
2026-06-10 ERU1 - Jun 10, 12:25 UTCJun 10, 13:30 UTC1h 5m
2026-06-09 ERU1 - Jun 9, 20:50 UTCJun 9, 22:05 UTC1h 15m
2026-06-09 ERU1 - Jun 9, 13:10 UTCJun 9, 14:30 UTC1h 20m

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 N1926R page for operator, model, and routing details .

Mode-S A172D3 frequently asked

What is Mode-S code A172D3?
A172D3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1926R.
Where is Mode-S A172D3 registered?
Mode-S code A172D3 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 A172D3 broadcasting right now?
No active broadcast right now. Last signal was 29d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A172D3, octal 50271323, decimal 10,580,691.
What flights does A172D3 operate?
Mode-S A172D3 has broadcast 1 distinct callsign, including ERU1.