Apparatus

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sensors Mode-S transponder

AC7C56

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N903WS · operated by GC AVIATION SERVICES-1 LLC

Hex
AC7C56
Octal
53076126
Decimal
11,304,022
Country
US
Tail
N903WS
Type
DV20
No current signal · last broadcast Jul 24, 14:45 UTC
Flights observed
75
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 14:45 UTC

Last known position

Most recent position reported by Mode-S AC7C56.

Country allocation

The ICAO 24-bit address AC7C56 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
N903WS - 75 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N903WS - Jul 24, 13:20 UTCJul 24, 14:45 UTC1h 25m
2026-07-23 N903WS - Jul 23, 15:55 UTCJul 23, 16:45 UTC50m
2026-07-23 N903WS - Jul 23, 13:50 UTCJul 23, 14:50 UTC1h 0m
2026-07-16 N903WS MGY → MGY Jul 16, 14:55 UTCJul 16, 16:05 UTC1h 10m
2026-07-15 N903WS - Jul 15, 17:05 UTCJul 15, 18:30 UTC1h 25m
2026-07-14 N903WS - Jul 14, 22:55 UTCJul 14, 23:55 UTC1h 0m
2026-07-14 N903WS - Jul 14, 17:15 UTCJul 14, 18:05 UTC50m
2026-07-13 N903WS - Jul 13, 20:50 UTCJul 13, 22:45 UTC1h 55m
2026-07-13 N903WS MGY → MGY Jul 13, 15:50 UTCJul 13, 17:25 UTC1h 35m
2026-07-09 N903WS - Jul 9, 17:05 UTCJul 9, 18:30 UTC1h 25m
2026-07-08 N903WS - Jul 8, 17:30 UTCJul 8, 18:40 UTC1h 10m
2026-07-08 N903WS - Jul 8, 15:05 UTCJul 8, 15:40 UTC35m
2026-07-03 N903WS MGY → MGY Jul 3, 16:20 UTCJul 3, 17:40 UTC1h 20m
2026-07-02 N903WS - Jul 2, 19:35 UTCJul 2, 20:35 UTC1h 0m
2026-07-02 N903WS - Jul 2, 12:55 UTCJul 2, 13:55 UTC1h 0m
2026-07-01 N903WS - Jul 1, 11:35 UTCJul 1, 12:35 UTC1h 0m
2026-06-30 N903WS MGY → MGY Jun 30, 11:55 UTCJun 30, 13:40 UTC1h 45m
2026-06-29 N903WS MGY → MGY Jun 29, 20:40 UTCJun 29, 22:35 UTC1h 55m
2026-06-29 N903WS - Jun 29, 17:40 UTCJun 29, 18:39 UTC1h 0m
2026-06-25 N903WS - Jun 25, 18:39 UTCJun 25, 19:39 UTC1h 0m
2026-06-25 N903WS - Jun 25, 11:44 UTCJun 25, 12:35 UTC50m
2026-06-24 N903WS - Jun 24, 22:49 UTCJun 24, 23:40 UTC50m
2026-06-24 N903WS MGY → MGY Jun 24, 20:44 UTCJun 24, 21:44 UTC1h 0m
2026-06-24 N903WS - Jun 24, 18:20 UTCJun 24, 19:04 UTC45m
2026-06-24 N903WS - Jun 24, 14:15 UTCJun 24, 15:29 UTC1h 15m
2026-06-23 N903WS MGY → MGY Jun 23, 20:34 UTCJun 23, 21:45 UTC1h 10m
2026-06-23 N903WS - Jun 23, 15:50 UTCJun 23, 16:50 UTC1h 0m
2026-06-16 N903WS - Jun 16, 17:24 UTCJun 16, 18:15 UTC50m
2026-06-15 N903WS - Jun 15, 16:09 UTCJun 15, 16:59 UTC50m
2026-06-12 N903WS - Jun 12, 22:30 UTCJun 13, 00:00 UTC1h 30m
2026-06-11 N903WS - Jun 11, 19:55 UTCJun 11, 20:35 UTC40m
2026-06-11 N903WS MGY → MGY Jun 11, 02:25 UTCJun 11, 03:45 UTC1h 20m
2026-06-10 N903WS MGY → MGY Jun 10, 22:10 UTCJun 10, 23:20 UTC1h 10m
2026-06-10 N903WS - Jun 10, 19:45 UTCJun 10, 20:35 UTC50m
2026-06-08 N903WS MGY → MGY Jun 8, 16:35 UTCJun 8, 17:50 UTC1h 15m
2026-06-08 N903WS MGY → MGY Jun 8, 13:20 UTCJun 8, 14:45 UTC1h 25m
2026-06-05 N903WS - Jun 5, 20:40 UTCJun 5, 21:10 UTC30m
2026-06-05 N903WS - Jun 5, 19:35 UTCJun 5, 20:05 UTC30m
2026-06-05 N903WS - Jun 5, 14:35 UTCJun 5, 15:00 UTC25m
2026-06-05 N903WS MGY → RID Jun 5, 13:25 UTCJun 5, 13:55 UTC30m
2026-06-04 N903WS MGY → MGY Jun 4, 23:00 UTCJun 5, 00:10 UTC1h 10m
2026-06-04 N903WS - Jun 4, 19:10 UTCJun 4, 20:35 UTC1h 25m
2026-06-04 N903WS - Jun 4, 15:25 UTCJun 4, 17:15 UTC1h 50m
2026-06-04 N903WS MGY → MGY Jun 4, 13:20 UTCJun 4, 14:45 UTC1h 25m
2026-06-03 N903WS - Jun 3, 20:25 UTCJun 3, 21:35 UTC1h 10m
2026-06-03 N903WS - Jun 3, 16:30 UTCJun 3, 17:15 UTC45m
2026-05-30 N903WS - May 30, 12:55 UTCMay 30, 14:15 UTC1h 20m
2026-05-15 N903WS MGY → MGY May 15, 18:40 UTCMay 15, 19:55 UTC1h 15m
2026-05-12 N903WS MGY → MGY May 12, 14:35 UTCMay 12, 15:05 UTC30m
2026-05-11 N903WS MGY → MGY May 11, 21:30 UTCMay 11, 22:35 UTC1h 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 N903WS page for operator, model, and routing details .

Mode-S AC7C56 frequently asked

What is Mode-S code AC7C56?
AC7C56 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N903WS.
Where is Mode-S AC7C56 registered?
Mode-S code AC7C56 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 AC7C56 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 14:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC7C56, octal 53076126, decimal 11,304,022.
What flights does AC7C56 operate?
Mode-S AC7C56 has broadcast 1 distinct callsign, including N903WS.