Apparatus

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sensors Mode-S transponder

A1C003

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2113J · CESSNA 172 Skyhawk · operated by ALTERNATE AIR INC

Hex
A1C003
Octal
50340003
Decimal
10,600,451
Country
US
Tail
N2113J
Type
C172
No current signal · last broadcast 15h ago
Flights observed
138
Distinct callsigns
1
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A1C003.

Country allocation

The ICAO 24-bit address A1C003 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
N2113J - 138 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N2113J - Jul 14, 00:50 UTCJul 14, 02:30 UTC1h 40m
2026-07-13 N2113J - Jul 13, 23:25 UTCJul 13, 23:35 UTC10m
2026-07-13 N2113J - Jul 13, 22:20 UTCJul 13, 23:10 UTC50m
2026-07-13 N2113J - Jul 13, 05:05 UTCJul 13, 05:20 UTC15m
2026-07-13 N2113J - Jul 13, 03:05 UTCJul 13, 04:55 UTC1h 50m
2026-07-13 N2113J - Jul 13, 02:20 UTCJul 13, 02:35 UTC15m
2026-07-12 N2113J - Jul 12, 23:30 UTCJul 13, 01:05 UTC1h 35m
2026-07-12 N2113J - Jul 12, 19:35 UTCJul 12, 21:25 UTC1h 50m
2026-07-12 N2113J - Jul 12, 02:40 UTCJul 12, 03:05 UTC25m
2026-07-11 N2113J - Jul 11, 21:10 UTCJul 11, 22:40 UTC1h 30m
2026-07-11 N2113J - Jul 11, 18:50 UTCJul 11, 20:00 UTC1h 10m
2026-07-11 N2113J - Jul 11, 16:50 UTCJul 11, 17:50 UTC1h 0m
2026-07-11 N2113J - Jul 11, 05:20 UTCJul 11, 05:45 UTC25m
2026-07-11 N2113J - Jul 11, 03:30 UTCJul 11, 04:20 UTC50m
2026-07-11 N2113J - Jul 11, 00:50 UTCJul 11, 02:45 UTC1h 55m
2026-07-09 N2113J - Jul 9, 17:10 UTCJul 9, 17:50 UTC40m
2026-07-08 N2113J - Jul 8, 22:25 UTCJul 8, 22:35 UTC10m
2026-07-07 N2113J - Jul 7, 22:45 UTCJul 8, 01:10 UTC2h 25m
2026-07-07 N2113J - Jul 7, 03:55 UTCJul 7, 05:35 UTC1h 40m
2026-07-07 N2113J - Jul 7, 01:20 UTCJul 7, 02:35 UTC1h 15m
2026-07-06 N2113J - Jul 6, 02:35 UTCJul 6, 03:10 UTC35m
2026-07-05 N2113J - Jul 5, 22:55 UTCJul 5, 23:25 UTC30m
2026-07-05 N2113J BFI → BFI Jul 5, 17:00 UTCJul 5, 17:55 UTC55m
2026-07-04 N2113J - Jul 4, 06:35 UTCJul 4, 06:50 UTC15m
2026-07-04 N2113J - Jul 4, 03:05 UTCJul 4, 03:45 UTC40m
2026-07-04 N2113J - Jul 4, 01:15 UTCJul 4, 01:25 UTC10m
2026-07-03 N2113J - Jul 3, 22:30 UTCJul 4, 00:40 UTC2h 10m
2026-07-02 N2113J RNT → BFI Jul 2, 22:30 UTCJul 2, 23:55 UTC1h 25m
2026-07-02 N2113J BFI → BFI Jul 2, 01:15 UTCJul 2, 02:05 UTC50m
2026-07-01 N2113J - Jul 1, 23:00 UTCJul 1, 23:50 UTC50m
2026-07-01 N2113J - Jul 1, 21:25 UTCJul 1, 21:50 UTC25m
2026-07-01 N2113J RNT → BFI Jul 1, 03:20 UTCJul 1, 04:20 UTC1h 0m
2026-06-30 N2113J - Jun 30, 23:35 UTCJun 30, 23:50 UTC15m
2026-06-30 N2113J - Jun 30, 22:00 UTCJun 30, 23:25 UTC1h 25m
2026-06-28 N2113J - Jun 28, 19:09 UTCJun 28, 20:34 UTC1h 25m
2026-06-27 N2113J - Jun 27, 21:55 UTCJun 27, 22:29 UTC35m
2026-06-27 N2113J - Jun 27, 16:59 UTCJun 27, 17:49 UTC50m
2026-06-26 N2113J - Jun 26, 21:35 UTCJun 26, 22:55 UTC1h 20m
2026-06-26 N2113J - Jun 26, 01:45 UTCJun 26, 02:09 UTC25m
2026-06-26 N2113J - Jun 26, 00:24 UTCJun 26, 01:24 UTC1h 0m
2026-06-25 N2113J - Jun 25, 01:04 UTCJun 25, 01:19 UTC15m
2026-06-24 N2113J - Jun 24, 23:40 UTCJun 25, 00:59 UTC1h 20m
2026-06-24 N2113J - Jun 24, 00:59 UTCJun 24, 01:30 UTC30m
2026-06-23 N2113J - Jun 23, 22:49 UTCJun 23, 23:34 UTC45m
2026-06-23 N2113J - Jun 23, 01:45 UTCJun 23, 03:20 UTC1h 35m
2026-06-22 N2113J - Jun 22, 22:59 UTCJun 23, 00:15 UTC1h 15m
2026-06-22 N2113J - Jun 22, 01:35 UTCJun 22, 01:49 UTC15m
2026-06-21 N2113J - Jun 21, 22:49 UTCJun 21, 23:05 UTC15m
2026-06-21 N2113J - Jun 21, 19:29 UTCJun 21, 21:44 UTC2h 15m
2026-06-21 N2113J - Jun 21, 05:20 UTCJun 21, 06:55 UTC1h 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 N2113J page for operator, model, and routing details .

Mode-S A1C003 frequently asked

What is Mode-S code A1C003?
A1C003 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2113J.
Where is Mode-S A1C003 registered?
Mode-S code A1C003 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 A1C003 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1C003, octal 50340003, decimal 10,600,451.
What flights does A1C003 operate?
Mode-S A1C003 has broadcast 1 distinct callsign, including N2113J.