Apparatus

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sensors Mode-S transponder

A0A440

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N140S · BEECH 58 Baron · operated by GTA AIR INC

Hex
A0A440
Octal
50122100
Decimal
10,527,808
Country
US
Tail
N140S
Type
BE58
No current signal · last broadcast Jul 25, 23:00 UTC
Flights observed
63
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 23:00 UTC

Last known position

Most recent position reported by Mode-S A0A440.

Country allocation

The ICAO 24-bit address A0A440 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 20 distinct

Callsign Airline Flights Last seen
GTX503 - 8 2026-06-17
GTX321 - 8 2026-05-22
GTX322 - 7 2026-05-15
GTX510 - 4 2026-07-17
GTX507 - 4 2026-04-25
GTX948 - 3 2026-06-18
GTX800 - 3 2026-07-03
GTX515 - 3 2026-07-25
GTX513 - 3 2026-07-24
GTX505 - 3 2026-06-29
GTX487 - 3 2026-06-23
GTX323 - 3 2026-05-15
GTX501 - 2 2026-06-10
GTX489 - 2 2026-06-23
GTX488 - 2 2026-06-23
GTX703 - 1 2026-06-24
GTX512 - 1 2026-07-18
GTX490 - 1 2026-06-23
GTX248 - 1 2026-04-26
GTX247 - 1 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 GTX515 - Jul 25, 21:05 UTCJul 25, 23:00 UTC1h 55m
2026-07-25 GTX515 - Jul 25, 18:55 UTCJul 25, 20:05 UTC1h 10m
2026-07-25 GTX515 - Jul 25, 14:30 UTCJul 25, 15:50 UTC1h 20m
2026-07-24 GTX513 - Jul 24, 01:55 UTCJul 24, 03:25 UTC1h 30m
2026-07-23 GTX513 - Jul 23, 23:05 UTCJul 24, 01:05 UTC2h 0m
2026-07-23 GTX513 - Jul 23, 19:35 UTCJul 23, 22:10 UTC2h 35m
2026-07-18 GTX512 - Jul 18, 00:39 UTCJul 18, 01:25 UTC45m
2026-07-17 GTX510 - Jul 17, 19:40 UTCJul 17, 21:10 UTC1h 30m
2026-07-17 GTX510 - Jul 17, 17:09 UTCJul 17, 18:34 UTC1h 25m
2026-07-16 GTX510 - Jul 16, 19:14 UTCJul 16, 20:05 UTC50m
2026-07-16 GTX510 - Jul 16, 11:40 UTCJul 16, 12:30 UTC50m
2026-07-03 GTX800 OLV → CMH Jul 3, 04:20 UTCJul 3, 06:45 UTC2h 25m
2026-07-03 GTX800 - Jul 3, 01:35 UTCJul 3, 02:25 UTC50m
2026-07-03 GTX800 - Jul 3, 00:15 UTCJul 3, 00:55 UTC40m
2026-06-29 GTX505 - Jun 29, 21:30 UTCJun 29, 21:39 UTC10m
2026-06-29 GTX505 - Jun 29, 19:35 UTCJun 29, 20:49 UTC1h 15m
2026-06-29 GTX505 - Jun 29, 17:19 UTCJun 29, 18:55 UTC1h 35m
2026-06-24 GTX703 - Jun 24, 17:55 UTCJun 24, 19:55 UTC2h 0m
2026-06-23 GTX490 - Jun 23, 06:24 UTCJun 23, 06:34 UTC10m
2026-06-23 GTX489 - Jun 23, 05:20 UTCJun 23, 05:49 UTC30m
2026-06-23 GTX489 - Jun 23, 04:25 UTCJun 23, 04:45 UTC20m
2026-06-23 GTX488 - Jun 23, 03:04 UTCJun 23, 03:49 UTC45m
2026-06-23 GTX488 - Jun 23, 02:20 UTCJun 23, 02:29 UTC10m
2026-06-23 GTX487 - Jun 23, 00:00 UTCJun 23, 00:09 UTC10m
2026-06-22 GTX487 - Jun 22, 22:34 UTCJun 22, 23:20 UTC45m
2026-06-22 GTX487 - Jun 22, 21:25 UTCJun 22, 21:59 UTC35m
2026-06-18 GTX948 - Jun 18, 05:15 UTCJun 18, 05:45 UTC30m
2026-06-18 GTX948 - Jun 18, 01:35 UTCJun 18, 04:05 UTC2h 30m
2026-06-17 GTX948 - Jun 17, 21:20 UTCJun 17, 22:25 UTC1h 5m
2026-06-17 GTX503 - Jun 17, 15:05 UTCJun 17, 16:45 UTC1h 40m
2026-06-17 GTX503 - Jun 17, 11:55 UTCJun 17, 13:25 UTC1h 30m
2026-06-10 GTX501 - Jun 10, 15:55 UTCJun 10, 17:45 UTC1h 50m
2026-06-10 GTX501 - Jun 10, 12:40 UTCJun 10, 13:40 UTC1h 0m
2026-05-29 GTX503 - May 29, 03:35 UTCMay 29, 04:55 UTC1h 20m
2026-05-28 GTX503 - May 28, 23:50 UTCMay 29, 02:50 UTC3h 0m
2026-05-28 GTX503 - May 28, 21:30 UTCMay 28, 23:10 UTC1h 40m
2026-05-22 GTX321 IAD → CMH May 22, 02:15 UTCMay 22, 03:55 UTC1h 40m
2026-05-18 GTX503 - May 18, 16:05 UTCMay 18, 17:25 UTC1h 20m
2026-05-18 GTX503 - May 18, 13:05 UTCMay 18, 14:55 UTC1h 50m
2026-05-18 GTX503 IAD → TTN May 18, 11:15 UTCMay 18, 12:10 UTC55m
2026-05-15 GTX323 FRG → IAD May 15, 08:40 UTCMay 15, 10:00 UTC1h 20m
2026-05-15 GTX322 - May 15, 05:30 UTCMay 15, 07:55 UTC2h 25m
2026-05-15 GTX321 IAD → CMH May 15, 01:40 UTCMay 15, 03:15 UTC1h 35m
2026-05-09 GTX322 - May 9, 05:15 UTCMay 9, 09:25 UTC4h 10m
2026-05-09 GTX321 IAD → CMH May 9, 01:25 UTCMay 9, 03:05 UTC1h 40m
2026-05-08 GTX322 - May 8, 05:29 UTCMay 8, 09:19 UTC3h 50m
2026-05-08 GTX321 IAD → CMH May 8, 01:04 UTCMay 8, 02:39 UTC1h 35m
2026-05-07 GTX322 - May 7, 05:30 UTCMay 7, 09:40 UTC4h 10m
2026-05-07 GTX321 IAD → CMH May 7, 01:15 UTCMay 7, 03:00 UTC1h 45m
2026-05-03 GTX322 CMH → IAD May 3, 02:20 UTCMay 3, 06:25 UTC4h 4m

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 N140S page for operator, model, and routing details .

Mode-S A0A440 frequently asked

What is Mode-S code A0A440?
A0A440 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N140S.
Where is Mode-S A0A440 registered?
Mode-S code A0A440 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 A0A440 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0A440, octal 50122100, decimal 10,527,808.
What flights does A0A440 operate?
Mode-S A0A440 has broadcast 20 distinct callsigns, including GTX503, GTX321, GTX322, GTX510, GTX507.