Apparatus

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sensors Mode-S transponder

A2D370

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N281TW · PIPER PA-28-140/150/160/180 · operated by SKYWEST LEASING INC

Hex
A2D370
Octal
50551560
Decimal
10,670,960
Country
US
Tail
N281TW
Type
P28A
No current signal · last broadcast Jul 26, 18:45 UTC
Flights observed
215
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 18:45 UTC

Last known position

Most recent position reported by Mode-S A2D370.

Country allocation

The ICAO 24-bit address A2D370 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
ASI993 - 215 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ASI993 DVT → DVT Jul 26, 17:45 UTCJul 26, 18:45 UTC1h 0m
2026-07-25 ASI993 - Jul 25, 17:35 UTCJul 25, 18:45 UTC1h 10m
2026-07-25 ASI993 - Jul 25, 14:10 UTCJul 25, 15:25 UTC1h 15m
2026-07-23 ASI993 - Jul 23, 18:15 UTCJul 23, 18:55 UTC40m
2026-07-23 ASI993 - Jul 23, 16:30 UTCJul 23, 18:10 UTC1h 40m
2026-07-23 ASI993 - Jul 23, 14:05 UTCJul 23, 14:35 UTC30m
2026-07-23 ASI993 - Jul 23, 13:15 UTCJul 23, 14:00 UTC45m
2026-07-21 ASI993 - Jul 21, 19:10 UTCJul 21, 20:30 UTC1h 20m
2026-07-21 ASI993 - Jul 21, 16:15 UTCJul 21, 17:20 UTC1h 5m
2026-07-21 ASI993 - Jul 21, 14:05 UTCJul 21, 14:55 UTC50m
2026-07-20 ASI993 DVT → DVT Jul 20, 21:45 UTCJul 20, 22:40 UTC55m
2026-07-20 ASI993 - Jul 20, 13:55 UTCJul 20, 14:50 UTC55m
2026-07-19 ASI993 - Jul 19, 21:25 UTCJul 19, 22:45 UTC1h 20m
2026-07-19 ASI993 DVT → DVT Jul 19, 18:35 UTCJul 19, 19:40 UTC1h 5m
2026-07-18 ASI993 - Jul 18, 14:55 UTCJul 18, 16:15 UTC1h 20m
2026-07-15 ASI993 - Jul 15, 18:20 UTCJul 15, 18:50 UTC30m
2026-07-15 ASI993 DVT → DVT Jul 15, 13:40 UTCJul 15, 15:30 UTC1h 50m
2026-07-13 ASI993 DVT → DVT Jul 13, 21:25 UTCJul 13, 22:10 UTC45m
2026-07-13 ASI993 DVT → DVT Jul 13, 18:00 UTCJul 13, 19:10 UTC1h 10m
2026-07-13 ASI993 - Jul 13, 15:10 UTCJul 13, 16:45 UTC1h 35m
2026-07-12 ASI993 - Jul 12, 17:55 UTCJul 12, 18:10 UTC15m
2026-07-12 ASI993 DVT → DVT Jul 12, 16:40 UTCJul 12, 17:50 UTC1h 10m
2026-07-12 ASI993 - Jul 12, 13:40 UTCJul 12, 14:40 UTC1h 0m
2026-07-10 ASI993 - Jul 10, 13:10 UTCJul 10, 14:25 UTC1h 15m
2026-07-09 ASI993 - Jul 9, 16:05 UTCJul 9, 16:45 UTC40m
2026-07-08 ASI993 - Jul 8, 13:35 UTCJul 8, 14:15 UTC40m
2026-07-07 ASI993 - Jul 7, 19:25 UTCJul 7, 20:25 UTC1h 0m
2026-07-07 ASI993 - Jul 7, 13:45 UTCJul 7, 15:50 UTC2h 5m
2026-07-07 ASI993 - Jul 7, 03:45 UTCJul 7, 04:55 UTC1h 10m
2026-07-07 ASI993 - Jul 7, 01:50 UTCJul 7, 03:05 UTC1h 15m
2026-07-06 ASI993 DVT → DVT Jul 6, 23:40 UTCJul 7, 00:45 UTC1h 5m
2026-07-06 ASI993 - Jul 6, 20:05 UTCJul 6, 22:15 UTC2h 10m
2026-07-06 ASI993 - Jul 6, 17:35 UTCJul 6, 17:45 UTC10m
2026-07-06 ASI993 - Jul 6, 15:25 UTCJul 6, 16:05 UTC40m
2026-07-06 ASI993 - Jul 6, 13:25 UTCJul 6, 14:15 UTC50m
2026-07-06 ASI993 DVT → DVT Jul 6, 13:05 UTCJul 6, 13:20 UTC15m
2026-07-05 ASI993 - Jul 5, 15:00 UTCJul 5, 16:40 UTC1h 40m
2026-07-04 ASI993 - Jul 4, 18:15 UTCJul 4, 19:30 UTC1h 15m
2026-07-02 ASI993 - Jul 2, 16:35 UTCJul 2, 17:30 UTC55m
2026-07-02 ASI993 - Jul 2, 14:25 UTCJul 2, 15:10 UTC45m
2026-07-02 ASI993 - Jul 2, 04:20 UTCJul 2, 05:30 UTC1h 10m
2026-07-02 ASI993 - Jul 2, 00:00 UTCJul 2, 01:05 UTC1h 5m
2026-07-01 ASI993 - Jul 1, 16:05 UTCJul 1, 17:25 UTC1h 20m
2026-07-01 ASI993 DVT → DVT Jul 1, 13:10 UTCJul 1, 15:10 UTC2h 0m
2026-06-30 ASI993 - Jun 30, 18:20 UTCJun 30, 19:35 UTC1h 15m
2026-06-30 ASI993 - Jun 30, 16:30 UTCJun 30, 17:15 UTC45m
2026-06-30 ASI993 - Jun 30, 13:00 UTCJun 30, 14:35 UTC1h 35m
2026-06-25 ASI993 - Jun 25, 13:00 UTCJun 25, 14:14 UTC1h 15m
2026-06-24 ASI993 DVT → DVT Jun 24, 16:05 UTCJun 24, 17:20 UTC1h 15m
2026-06-24 ASI993 - Jun 24, 12:54 UTCJun 24, 14:04 UTC1h 10m

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 N281TW page for operator, model, and routing details .

Mode-S A2D370 frequently asked

What is Mode-S code A2D370?
A2D370 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N281TW.
Where is Mode-S A2D370 registered?
Mode-S code A2D370 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 A2D370 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2D370, octal 50551560, decimal 10,670,960.
What flights does A2D370 operate?
Mode-S A2D370 has broadcast 1 distinct callsign, including ASI993.