Apparatus

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sensors Mode-S transponder

A2D331

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N281RH · GULFSTREAM G280 · operated by WINNEPEG LLC

Hex
A2D331
Octal
50551461
Decimal
10,670,897
Country
US
Tail
N281RH
Type
G280
No current signal · last broadcast 3d ago
Flights observed
101
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A2D331.

Country allocation

The ICAO 24-bit address A2D331 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
N281RH - 101 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 N281RH - Jul 10, 21:35 UTCJul 11, 00:50 UTC3h 15m
2026-07-10 N281RH - Jul 10, 16:45 UTCJul 10, 20:35 UTC3h 50m
2026-07-10 N281RH - Jul 10, 13:25 UTCJul 10, 15:10 UTC1h 45m
2026-07-09 N281RH - Jul 9, 16:35 UTCJul 9, 18:45 UTC2h 10m
2026-07-06 N281RH - Jul 6, 23:00 UTCJul 7, 02:15 UTC3h 15m
2026-07-06 N281RH - Jul 6, 18:40 UTCJul 6, 22:10 UTC3h 30m
2026-07-06 N281RH IAD → UGN Jul 6, 02:35 UTCJul 6, 04:15 UTC1h 40m
2026-07-05 N281RH - Jul 5, 19:30 UTCJul 5, 21:20 UTC1h 50m
2026-07-05 N281RH - Jul 5, 17:05 UTCJul 5, 17:15 UTC10m
2026-07-03 N281RH IAD → UGN Jul 3, 17:35 UTCJul 3, 19:10 UTC1h 35m
2026-07-03 N281RH - Jul 3, 15:25 UTCJul 3, 16:40 UTC1h 15m
2026-07-03 N281RH - Jul 3, 11:25 UTCJul 3, 13:25 UTC2h 0m
2026-07-02 N281RH - Jul 2, 17:25 UTCJul 2, 19:15 UTC1h 50m
2026-07-02 N281RH - Jul 2, 14:00 UTCJul 2, 16:10 UTC2h 10m
2026-07-01 N281RH - Jul 1, 19:40 UTCJul 1, 21:20 UTC1h 40m
2026-07-01 N281RH - Jul 1, 14:05 UTCJul 1, 18:35 UTC4h 30m
2026-06-29 N281RH - Jun 29, 21:30 UTCJun 30, 01:19 UTC3h 50m
2026-06-27 N281RH - Jun 27, 22:49 UTCJun 28, 00:55 UTC2h 5m
2026-06-27 N281RH - Jun 27, 20:19 UTCJun 27, 21:15 UTC55m
2026-06-27 N281RH - Jun 27, 17:55 UTCJun 27, 19:19 UTC1h 25m
2026-06-27 N281RH - Jun 27, 14:29 UTCJun 27, 17:04 UTC2h 35m
2026-06-26 N281RH - Jun 26, 14:05 UTCJun 26, 16:20 UTC2h 15m
2026-06-25 N281RH - Jun 25, 17:14 UTCJun 25, 17:49 UTC35m
2026-06-25 N281RH - Jun 25, 16:29 UTCJun 25, 16:55 UTC25m
2026-06-24 N281RH CMI → MDW Jun 24, 15:54 UTCJun 24, 16:24 UTC30m
2026-06-24 N281RH - Jun 24, 14:20 UTCJun 24, 14:50 UTC30m
2026-06-24 N281RH - Jun 24, 01:34 UTCJun 24, 03:00 UTC1h 25m
2026-06-23 N281RH - Jun 23, 22:29 UTCJun 24, 00:55 UTC2h 25m
2026-06-23 N281RH TEB → MIA Jun 23, 14:44 UTCJun 23, 17:15 UTC2h 30m
2026-06-22 N281RH - Jun 22, 16:40 UTCJun 22, 17:44 UTC1h 5m
2026-06-22 N281RH - Jun 22, 13:59 UTCJun 22, 15:54 UTC1h 55m
2026-06-18 N281RH - Jun 18, 21:35 UTCJun 18, 22:15 UTC40m
2026-06-18 N281RH - Jun 18, 14:45 UTCJun 18, 15:20 UTC35m
2026-06-15 N281RH - Jun 15, 20:04 UTCJun 15, 22:49 UTC2h 45m
2026-06-15 N281RH - Jun 15, 15:19 UTCJun 15, 17:34 UTC2h 15m
2026-06-14 N281RH - Jun 14, 18:05 UTCJun 14, 20:10 UTC2h 5m
2026-06-12 N281RH - Jun 12, 14:05 UTCJun 12, 15:50 UTC1h 45m
2026-06-09 N281RH - Jun 9, 20:40 UTCJun 9, 23:20 UTC2h 40m
2026-06-09 N281RH - Jun 9, 18:10 UTCJun 9, 19:55 UTC1h 45m
2026-06-08 N281RH - Jun 8, 12:25 UTCJun 8, 14:00 UTC1h 35m
2026-06-07 N281RH - Jun 7, 20:15 UTCJun 7, 22:15 UTC2h 0m
2026-06-07 N281RH - Jun 7, 16:45 UTCJun 7, 18:55 UTC2h 10m
2026-06-05 N281RH - Jun 5, 19:35 UTCJun 5, 21:45 UTC2h 10m
2026-06-05 N281RH IAD → ACK Jun 5, 17:50 UTCJun 5, 18:55 UTC1h 5m
2026-06-05 N281RH - Jun 5, 14:20 UTCJun 5, 15:45 UTC1h 25m
2026-06-02 N281RH MSY → UGN Jun 2, 01:40 UTCJun 2, 03:40 UTC2h 0m
2026-06-01 N281RH - Jun 1, 16:20 UTCJun 1, 18:10 UTC1h 50m
2026-05-30 N281RH - May 30, 19:55 UTCMay 30, 22:00 UTC2h 5m
2026-05-30 N281RH - May 30, 16:05 UTCMay 30, 16:45 UTC40m
2026-05-28 N281RH - May 28, 13:45 UTCMay 28, 16:20 UTC2h 35m

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 N281RH page for operator, model, and routing details .

Mode-S A2D331 frequently asked

What is Mode-S code A2D331?
A2D331 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N281RH.
Where is Mode-S A2D331 registered?
Mode-S code A2D331 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 A2D331 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2D331, octal 50551461, decimal 10,670,897.
What flights does A2D331 operate?
Mode-S A2D331 has broadcast 1 distinct callsign, including N281RH.