Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A649C9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N504LC · PILATUS PC-12

Hex
A649C9
Octal
51444711
Decimal
10,897,865
Country
US
Tail
N504LC
Type
PC12
No current signal · last broadcast 1d ago
Flights observed
51
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A649C9.

Country allocation

The ICAO 24-bit address A649C9 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
JCY504 - 51 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JCY504 - Jul 26, 19:15 UTCJul 26, 19:40 UTC25m
2026-07-26 JCY504 - Jul 26, 16:00 UTCJul 26, 18:45 UTC2h 45m
2026-07-26 JCY504 - Jul 26, 14:05 UTCJul 26, 14:35 UTC30m
2026-07-25 JCY504 - Jul 25, 17:50 UTCJul 25, 19:40 UTC1h 50m
2026-07-25 JCY504 - Jul 25, 17:10 UTCJul 25, 17:20 UTC10m
2026-07-25 JCY504 - Jul 25, 16:05 UTCJul 25, 16:40 UTC35m
2026-07-25 JCY504 - Jul 25, 13:55 UTCJul 25, 15:05 UTC1h 10m
2026-07-21 JCY504 - Jul 21, 01:00 UTCJul 21, 01:45 UTC45m
2026-07-20 JCY504 - Jul 20, 22:30 UTCJul 20, 22:45 UTC15m
2026-07-20 JCY504 - Jul 20, 19:30 UTCJul 20, 20:40 UTC1h 10m
2026-07-20 JCY504 - Jul 20, 14:00 UTCJul 20, 15:10 UTC1h 10m
2026-07-19 JCY504 - Jul 19, 21:20 UTCJul 19, 22:00 UTC40m
2026-07-17 JCY504 RNT → RNT Jul 17, 23:30 UTCJul 18, 00:39 UTC1h 10m
2026-07-17 JCY504 SJC → RNT Jul 17, 18:15 UTCJul 17, 20:35 UTC2h 20m
2026-07-15 JCY504 - Jul 15, 20:10 UTCJul 15, 22:55 UTC2h 45m
2026-07-15 JCY504 - Jul 15, 17:30 UTCJul 15, 17:50 UTC20m
2026-06-24 JCY504 - Jun 24, 18:39 UTCJun 24, 20:09 UTC1h 30m
2026-06-23 JCY504 - Jun 23, 18:14 UTCJun 23, 19:19 UTC1h 5m
2026-06-18 JCY504 BFI → RNT Jun 18, 18:15 UTCJun 18, 18:20 UTC5m
2026-06-17 JCY504 - Jun 17, 23:55 UTCJun 18, 01:10 UTC1h 15m
2026-06-17 JCY504 - Jun 17, 22:05 UTCJun 17, 23:30 UTC1h 25m
2026-06-16 JCY504 - Jun 16, 15:24 UTCJun 16, 16:35 UTC1h 10m
2026-06-16 JCY504 - Jun 16, 13:50 UTCJun 16, 14:15 UTC25m
2026-06-16 JCY504 - Jun 16, 12:45 UTCJun 16, 13:04 UTC20m
2026-06-09 JCY504 - Jun 9, 04:10 UTCJun 9, 04:35 UTC25m
2026-06-09 JCY504 - Jun 9, 01:05 UTCJun 9, 03:10 UTC2h 5m
2026-06-07 JCY504 - Jun 7, 21:20 UTCJun 7, 23:50 UTC2h 30m
2026-06-07 JCY504 - Jun 7, 20:00 UTCJun 7, 20:20 UTC20m
2026-06-06 JCY504 - Jun 6, 01:15 UTCJun 6, 01:35 UTC20m
2026-06-05 JCY504 - Jun 5, 22:20 UTCJun 6, 00:20 UTC2h 0m
2026-06-05 JCY504 - Jun 5, 18:25 UTCJun 5, 21:15 UTC2h 50m
2026-06-04 JCY504 - Jun 4, 20:35 UTCJun 4, 20:55 UTC20m
2026-06-04 JCY504 - Jun 4, 18:45 UTCJun 4, 19:00 UTC15m
2026-06-02 JCY504 - Jun 2, 17:40 UTCJun 2, 18:05 UTC25m
2026-06-02 JCY504 - Jun 2, 16:40 UTCJun 2, 17:00 UTC20m
2026-06-02 JCY504 - Jun 2, 13:50 UTCJun 2, 15:10 UTC1h 20m
2026-06-01 JCY504 - Jun 1, 15:40 UTCJun 1, 16:55 UTC1h 15m
2026-06-01 JCY504 - Jun 1, 13:55 UTCJun 1, 14:15 UTC20m
2026-06-01 JCY504 - Jun 1, 13:00 UTCJun 1, 13:20 UTC20m
2026-05-26 JCY504 BFI → RNT May 26, 03:45 UTCMay 26, 03:50 UTC5m
2026-05-26 JCY504 - May 26, 01:49 UTCMay 26, 02:55 UTC1h 5m
2026-05-22 JCY504 - May 22, 23:10 UTCMay 23, 00:05 UTC55m
2026-05-21 JCY504 - May 21, 20:05 UTCMay 21, 23:35 UTC3h 30m
2026-05-21 JCY504 - May 21, 14:50 UTCMay 21, 17:35 UTC2h 45m
2026-05-10 JCY504 COE → RNT May 10, 01:14 UTCMay 10, 02:14 UTC1h 0m
2026-05-08 JCY504 - May 8, 22:45 UTCMay 8, 23:40 UTC55m
2026-04-23 JCY504 - Apr 23, 02:45 UTCApr 23, 03:05 UTC20m
2026-04-23 JCY504 - Apr 23, 01:45 UTCApr 23, 02:05 UTC20m
2026-04-22 JCY504 HIO → RNT Apr 22, 04:45 UTCApr 22, 05:25 UTC40m
2026-04-21 JCY504 - Apr 21, 20:50 UTCApr 21, 21:40 UTC50m

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 N504LC page for operator, model, and routing details .

Mode-S A649C9 frequently asked

What is Mode-S code A649C9?
A649C9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N504LC.
Where is Mode-S A649C9 registered?
Mode-S code A649C9 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 A649C9 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A649C9, octal 51444711, decimal 10,897,865.
What flights does A649C9 operate?
Mode-S A649C9 has broadcast 1 distinct callsign, including JCY504.