Apparatus

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sensors Mode-S transponder

A24137

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2440D · operated by XING KONG AVIATION SERVICE LLC

Hex
A24137
Octal
50440467
Decimal
10,633,527
Country
US
Tail
N2440D
Type
PA44
No current signal · last broadcast 16d ago
Flights observed
58
Distinct callsigns
1
Country
US
Last broadcast
16d ago

Last known position

Most recent position reported by Mode-S A24137.

Country allocation

The ICAO 24-bit address A24137 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
N2440D - 58 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N2440D - Jul 21, 16:35 UTCJul 21, 17:55 UTC1h 20m
2026-07-15 N2440D - Jul 15, 16:05 UTCJul 15, 16:45 UTC40m
2026-07-14 N2440D - Jul 14, 15:55 UTCJul 14, 16:45 UTC50m
2026-07-09 N2440D - Jul 9, 17:45 UTCJul 9, 18:40 UTC55m
2026-07-09 N2440D - Jul 9, 04:55 UTCJul 9, 05:25 UTC30m
2026-07-09 N2440D - Jul 9, 03:55 UTCJul 9, 04:25 UTC30m
2026-07-03 N2440D - Jul 3, 05:50 UTCJul 3, 06:15 UTC25m
2026-07-03 N2440D - Jul 3, 04:35 UTCJul 3, 05:05 UTC30m
2026-07-02 N2440D - Jul 2, 16:40 UTCJul 2, 17:20 UTC40m
2026-06-26 N2440D - Jun 26, 21:39 UTCJun 26, 21:55 UTC15m
2026-06-26 N2440D MER → MAE Jun 26, 19:14 UTCJun 26, 19:35 UTC20m
2026-06-26 N2440D MER → MER Jun 26, 00:30 UTCJun 26, 02:09 UTC1h 40m
2026-06-25 N2440D - Jun 25, 03:20 UTCJun 25, 04:35 UTC1h 15m
2026-06-24 N2440D - Jun 24, 03:15 UTCJun 24, 04:55 UTC1h 40m
2026-06-23 N2440D MER → MER Jun 23, 23:24 UTCJun 24, 00:44 UTC1h 20m
2026-06-23 N2440D - Jun 23, 05:45 UTCJun 23, 05:59 UTC15m
2026-06-23 N2440D MER → MAE Jun 23, 04:05 UTCJun 23, 04:25 UTC20m
2026-06-19 N2440D - Jun 19, 19:04 UTCJun 19, 19:14 UTC10m
2026-06-18 N2440D - Jun 18, 21:35 UTCJun 18, 21:45 UTC10m
2026-06-17 N2440D - Jun 17, 21:20 UTCJun 17, 22:05 UTC45m
2026-06-17 N2440D - Jun 17, 17:40 UTCJun 17, 18:30 UTC50m
2026-06-17 N2440D - Jun 17, 05:00 UTCJun 17, 05:35 UTC35m
2026-06-17 N2440D - Jun 17, 03:55 UTCJun 17, 04:10 UTC15m
2026-06-17 N2440D - Jun 17, 01:30 UTCJun 17, 02:50 UTC1h 20m
2026-06-16 N2440D - Jun 16, 21:45 UTCJun 16, 22:20 UTC35m
2026-06-16 N2440D - Jun 16, 01:35 UTCJun 16, 02:45 UTC1h 10m
2026-06-15 N2440D MER → MER Jun 15, 23:30 UTCJun 16, 00:05 UTC35m
2026-06-14 N2440D - Jun 14, 17:45 UTCJun 14, 18:30 UTC45m
2026-06-11 N2440D - Jun 11, 23:00 UTCJun 12, 00:15 UTC1h 15m
2026-06-11 N2440D - Jun 11, 19:40 UTCJun 11, 20:40 UTC1h 0m
2026-06-11 N2440D - Jun 11, 16:45 UTCJun 11, 17:35 UTC50m
2026-06-10 N2440D - Jun 10, 16:35 UTCJun 10, 17:10 UTC35m
2026-06-10 N2440D - Jun 10, 04:55 UTCJun 10, 05:05 UTC10m
2026-06-10 N2440D - Jun 10, 03:15 UTCJun 10, 03:35 UTC20m
2026-06-10 N2440D - Jun 10, 00:00 UTCJun 10, 00:40 UTC40m
2026-06-09 N2440D - Jun 9, 21:55 UTCJun 9, 22:30 UTC35m
2026-06-09 N2440D - Jun 9, 19:45 UTCJun 9, 20:15 UTC30m
2026-06-08 N2440D - Jun 8, 22:10 UTCJun 8, 22:50 UTC40m
2026-06-05 N2440D - Jun 5, 19:55 UTCJun 5, 20:15 UTC20m
2026-06-05 N2440D - Jun 5, 15:35 UTCJun 5, 17:20 UTC1h 45m
2026-06-04 N2440D - Jun 4, 20:50 UTCJun 4, 22:30 UTC1h 40m
2026-06-04 N2440D MER → MER Jun 4, 15:35 UTCJun 4, 16:35 UTC1h 0m
2026-06-03 N2440D - Jun 3, 21:25 UTCJun 3, 22:10 UTC45m
2026-06-02 N2440D - Jun 2, 01:45 UTCJun 2, 02:00 UTC15m
2026-06-01 N2440D - Jun 1, 23:50 UTCJun 2, 00:15 UTC25m
2026-06-01 N2440D - Jun 1, 19:30 UTCJun 1, 19:45 UTC15m
2026-05-31 N2440D - May 31, 20:45 UTCMay 31, 20:55 UTC10m
2026-05-31 N2440D - May 31, 18:00 UTCMay 31, 18:20 UTC20m
2026-05-29 N2440D - May 29, 21:40 UTCMay 29, 22:15 UTC35m
2026-05-29 N2440D - May 29, 18:40 UTCMay 29, 19:15 UTC35m

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 N2440D page for operator, model, and routing details .

Mode-S A24137 frequently asked

What is Mode-S code A24137?
A24137 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2440D.
Where is Mode-S A24137 registered?
Mode-S code A24137 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 A24137 broadcasting right now?
No active broadcast right now. Last signal was 16d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A24137, octal 50440467, decimal 10,633,527.
What flights does A24137 operate?
Mode-S A24137 has broadcast 1 distinct callsign, including N2440D.