Apparatus

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sensors Mode-S transponder

A21793

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N234CE · PIPER PA-31-300/310/325/350/425 · operated by AIR ARCTIC INC

Hex
A21793
Octal
50413623
Decimal
10,622,867
Country
US
Tail
N234CE
Type
PA31
No current signal · last broadcast 3h ago
Flights observed
93
Distinct callsigns
1
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A21793.

Country allocation

The ICAO 24-bit address A21793 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
N234CE - 93 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N234CE - Jul 14, 08:05 UTCJul 14, 08:35 UTC30m
2026-07-14 N234CE - Jul 14, 07:25 UTCJul 14, 07:40 UTC15m
2026-07-14 N234CE - Jul 14, 03:00 UTCJul 14, 03:10 UTC10m
2026-07-14 N234CE - Jul 14, 01:30 UTCJul 14, 01:55 UTC25m
2026-07-12 N234CE - Jul 12, 01:00 UTCJul 12, 01:30 UTC30m
2026-07-11 N234CE - Jul 11, 19:35 UTCJul 11, 19:50 UTC15m
2026-07-11 N234CE - Jul 11, 14:55 UTCJul 11, 15:05 UTC10m
2026-07-09 N234CE - Jul 9, 20:30 UTCJul 9, 21:10 UTC40m
2026-07-08 N234CE - Jul 8, 22:40 UTCJul 8, 23:50 UTC1h 10m
2026-07-08 N234CE - Jul 8, 04:25 UTCJul 8, 05:40 UTC1h 15m
2026-07-08 N234CE - Jul 8, 02:10 UTCJul 8, 02:35 UTC25m
2026-07-07 N234CE - Jul 7, 20:55 UTCJul 7, 21:10 UTC15m
2026-07-05 N234CE - Jul 5, 01:45 UTCJul 5, 02:05 UTC20m
2026-07-04 N234CE - Jul 4, 21:00 UTCJul 4, 21:20 UTC20m
2026-07-02 N234CE FAI → FAI Jul 2, 17:10 UTCJul 2, 17:20 UTC10m
2026-06-30 N234CE - Jun 30, 03:10 UTCJun 30, 03:35 UTC25m
2026-06-28 N234CE - Jun 28, 07:14 UTCJun 28, 08:00 UTC45m
2026-06-28 N234CE - Jun 28, 02:14 UTCJun 28, 03:00 UTC45m
2026-06-26 N234CE - Jun 26, 22:49 UTCJun 27, 00:14 UTC1h 25m
2026-06-26 N234CE - Jun 26, 07:35 UTCJun 26, 08:10 UTC35m
2026-06-26 N234CE - Jun 26, 02:30 UTCJun 26, 03:05 UTC35m
2026-06-25 N234CE - Jun 25, 23:14 UTCJun 25, 23:49 UTC35m
2026-06-25 N234CE - Jun 25, 21:15 UTCJun 25, 21:44 UTC30m
2026-06-25 N234CE - Jun 25, 19:44 UTCJun 25, 20:09 UTC25m
2026-06-23 N234CE - Jun 23, 01:35 UTCJun 23, 02:09 UTC35m
2026-06-22 N234CE - Jun 22, 20:34 UTCJun 22, 21:10 UTC35m
2026-06-19 N234CE - Jun 19, 04:14 UTCJun 19, 05:40 UTC1h 25m
2026-06-18 N234CE - Jun 18, 04:15 UTCJun 18, 05:35 UTC1h 20m
2026-06-18 N234CE - Jun 18, 01:40 UTCJun 18, 02:20 UTC40m
2026-06-17 N234CE - Jun 17, 20:35 UTCJun 17, 21:10 UTC35m
2026-06-17 N234CE - Jun 17, 07:40 UTCJun 17, 08:10 UTC30m
2026-06-17 N234CE - Jun 17, 02:30 UTCJun 17, 03:05 UTC35m
2026-06-16 N234CE - Jun 16, 06:04 UTCJun 16, 06:50 UTC45m
2026-06-16 N234CE - Jun 16, 03:04 UTCJun 16, 03:20 UTC15m
2026-06-16 N234CE - Jun 16, 02:09 UTCJun 16, 02:34 UTC25m
2026-06-15 N234CE - Jun 15, 04:34 UTCJun 15, 05:55 UTC1h 20m
2026-06-15 N234CE - Jun 15, 02:24 UTCJun 15, 02:55 UTC30m
2026-06-14 N234CE - Jun 14, 06:05 UTCJun 14, 06:15 UTC10m
2026-06-14 N234CE - Jun 14, 03:05 UTCJun 14, 03:25 UTC20m
2026-06-14 N234CE - Jun 14, 01:40 UTCJun 14, 01:55 UTC15m
2026-06-13 N234CE - Jun 13, 21:00 UTCJun 13, 21:20 UTC20m
2026-06-13 N234CE - Jun 13, 19:30 UTCJun 13, 19:50 UTC20m
2026-06-13 N234CE - Jun 13, 14:50 UTCJun 13, 15:10 UTC20m
2026-06-12 N234CE - Jun 12, 19:20 UTCJun 12, 19:40 UTC20m
2026-06-12 N234CE - Jun 12, 14:55 UTCJun 12, 15:10 UTC15m
2026-06-12 N234CE - Jun 12, 07:45 UTCJun 12, 08:00 UTC15m
2026-06-12 N234CE - Jun 12, 05:45 UTCJun 12, 06:00 UTC15m
2026-06-12 N234CE - Jun 12, 05:05 UTCJun 12, 05:25 UTC20m
2026-06-12 N234CE - Jun 12, 03:00 UTCJun 12, 03:15 UTC15m
2026-06-12 N234CE - Jun 12, 01:55 UTCJun 12, 02:10 UTC15m

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 N234CE page for operator, model, and routing details .

Mode-S A21793 frequently asked

What is Mode-S code A21793?
A21793 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N234CE.
Where is Mode-S A21793 registered?
Mode-S code A21793 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 A21793 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A21793, octal 50413623, decimal 10,622,867.
What flights does A21793 operate?
Mode-S A21793 has broadcast 1 distinct callsign, including N234CE.