Apparatus

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sensors Mode-S transponder

A1DC39

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N219PC · PILATUS PC-12 · operated by E2R LLC

Hex
A1DC39
Octal
50356071
Decimal
10,607,673
Country
US
Tail
N219PC
Type
PC12
No current signal · last broadcast 28d ago
Flights observed
103
Distinct callsigns
1
Country
US
Last broadcast
28d ago

Last known position

Most recent position reported by Mode-S A1DC39.

Country allocation

The ICAO 24-bit address A1DC39 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
RYA219 Ryan Air Services 103 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYA219 ANC → ANI Jul 26, 19:50 UTCJul 26, 20:45 UTC55m
2026-07-26 RYA219 ANC → ANI Jul 26, 17:50 UTCJul 26, 18:45 UTC55m
2026-07-25 RYA219 ANC → ANI Jul 25, 22:40 UTCJul 25, 23:55 UTC1h 15m
2026-07-25 RYA219 ANC → ANI Jul 25, 20:10 UTCJul 25, 21:30 UTC1h 20m
2026-07-25 RYA219 ANC → ANI Jul 25, 16:40 UTCJul 25, 19:25 UTC2h 45m
2026-07-24 RYA219 ANC → ANI Jul 24, 23:25 UTCJul 25, 00:20 UTC55m
2026-07-24 RYA219 ANC → ANI Jul 24, 21:35 UTCJul 24, 23:20 UTC1h 45m
2026-07-24 RYA219 ANC → ANI Jul 24, 17:50 UTCJul 24, 20:05 UTC2h 15m
2026-07-24 RYA219 ANC → ANI Jul 24, 16:20 UTCJul 24, 17:45 UTC1h 25m
2026-07-24 RYA219 ANC → ANI Jul 24, 00:30 UTCJul 24, 01:40 UTC1h 10m
2026-07-23 RYA219 ANC → ANI Jul 23, 21:35 UTCJul 23, 23:05 UTC1h 30m
2026-07-23 RYA219 ANC → ANI Jul 23, 19:50 UTCJul 23, 20:50 UTC1h 0m
2026-07-23 RYA219 ANC → ANI Jul 23, 17:20 UTCJul 23, 18:35 UTC1h 15m
2026-07-22 RYA219 ANC → ANI Jul 22, 19:50 UTCJul 22, 20:55 UTC1h 5m
2026-07-22 RYA219 ANC → ANI Jul 22, 17:20 UTCJul 22, 18:40 UTC1h 20m
2026-07-22 RYA219 ANC → ANI Jul 22, 01:05 UTCJul 22, 02:35 UTC1h 30m
2026-07-21 RYA219 ANC → ANI Jul 21, 22:15 UTCJul 21, 23:40 UTC1h 25m
2026-07-21 RYA219 ANC → ANI Jul 21, 20:55 UTCJul 21, 21:20 UTC25m
2026-07-21 RYA219 ANC → ANI Jul 21, 16:25 UTCJul 21, 16:45 UTC20m
2026-07-21 RYA219 ANC → ANI Jul 21, 05:25 UTCJul 21, 05:40 UTC15m
2026-07-19 RYA219 ANC → ANI Jul 19, 17:30 UTCJul 19, 18:55 UTC1h 25m
2026-07-11 RYA219 - Jul 11, 23:05 UTCJul 12, 00:05 UTC1h 0m
2026-07-11 RYA219 - Jul 11, 20:15 UTCJul 11, 21:30 UTC1h 15m
2026-07-10 RYA219 - Jul 10, 23:20 UTCJul 11, 00:20 UTC1h 0m
2026-07-10 RYA219 - Jul 10, 21:00 UTCJul 10, 22:00 UTC1h 0m
2026-07-10 RYA219 - Jul 10, 19:15 UTCJul 10, 20:20 UTC1h 5m
2026-07-10 RYA219 - Jul 10, 17:10 UTCJul 10, 18:10 UTC1h 0m
2026-07-10 RYA219 - Jul 10, 00:10 UTCJul 10, 01:15 UTC1h 5m
2026-07-09 RYA219 - Jul 9, 21:20 UTCJul 9, 22:35 UTC1h 15m
2026-07-09 RYA219 - Jul 9, 19:35 UTCJul 9, 20:35 UTC1h 0m
2026-07-09 RYA219 - Jul 9, 17:25 UTCJul 9, 18:20 UTC55m
2026-07-08 RYA219 - Jul 8, 22:10 UTCJul 8, 23:25 UTC1h 15m
2026-07-08 RYA219 - Jul 8, 17:00 UTCJul 8, 17:50 UTC50m
2026-07-07 RYA219 - Jul 7, 23:20 UTCJul 8, 00:45 UTC1h 25m
2026-07-07 RYA219 - Jul 7, 20:50 UTCJul 7, 21:55 UTC1h 5m
2026-07-07 RYA219 - Jul 7, 19:10 UTCJul 7, 20:35 UTC1h 25m
2026-07-07 RYA219 - Jul 7, 17:10 UTCJul 7, 18:05 UTC55m
2026-07-06 RYA219 - Jul 6, 23:05 UTCJul 7, 00:10 UTC1h 5m
2026-07-06 RYA219 - Jul 6, 21:05 UTCJul 6, 22:05 UTC1h 0m
2026-07-06 RYA219 - Jul 6, 19:15 UTCJul 6, 20:20 UTC1h 5m
2026-07-06 RYA219 - Jul 6, 17:15 UTCJul 6, 18:15 UTC1h 0m
2026-07-04 RYA219 - Jul 4, 01:25 UTCJul 4, 02:45 UTC1h 20m
2026-07-03 RYA219 - Jul 3, 21:50 UTCJul 3, 23:20 UTC1h 30m
2026-07-03 RYA219 ANC → FAI Jul 3, 20:15 UTCJul 3, 21:20 UTC1h 5m
2026-07-03 RYA219 - Jul 3, 17:45 UTCJul 3, 18:45 UTC1h 0m
2026-07-03 RYA219 ANC → AKN Jul 3, 15:45 UTCJul 3, 17:05 UTC1h 20m
2026-07-02 RYA219 - Jul 2, 23:50 UTCJul 3, 00:55 UTC1h 5m
2026-07-02 RYA219 - Jul 2, 21:05 UTCJul 2, 22:20 UTC1h 15m
2026-07-02 RYA219 - Jul 2, 19:20 UTCJul 2, 20:20 UTC1h 0m
2026-07-02 RYA219 - Jul 2, 17:15 UTCJul 2, 18:15 UTC1h 0m

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 N219PC page for operator, model, and routing details .

Mode-S A1DC39 frequently asked

What is Mode-S code A1DC39?
A1DC39 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N219PC.
Where is Mode-S A1DC39 registered?
Mode-S code A1DC39 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 A1DC39 broadcasting right now?
No active broadcast right now. Last signal was 28d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1DC39, octal 50356071, decimal 10,607,673.
What flights does A1DC39 operate?
Mode-S A1DC39 has broadcast 1 distinct callsign, including RYA219.