Apparatus

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sensors Mode-S transponder

781FC9

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32F9 · AIRBUS A-321neo

Hex
781FC9
Octal
36017711
Decimal
7,872,457
Country
CN
Tail
B-32F9
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
39
Distinct callsigns
6
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781FC9.

Country allocation

The ICAO 24-bit address 781FC9 falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China 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 6 distinct

Callsign Airline Flights Last seen
UEA2264 United Eagle Airlines 14 2026-05-15
UEA2220 United Eagle Airlines 12 2026-05-16
UEA2219 United Eagle Airlines 6 2026-05-11
UEA2218 United Eagle Airlines 5 2026-05-29
UEA2217 United Eagle Airlines 1 2026-04-13
UEA1969 - 1 2026-04-15

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-05-29 UEA2218 SZX → CTU May 29, 03:45 UTCMay 29, 04:00 UTC15m
2026-05-16 UEA2220 SZX → CTU May 16, 13:25 UTCMay 16, 13:35 UTC10m
2026-05-15 UEA2264 HGH → HAK May 15, 07:40 UTCMay 15, 11:05 UTC3h 25m
2026-05-14 UEA2220 SZX → CTU May 14, 15:01 UTCMay 14, 15:15 UTC15m
2026-05-13 UEA2264 HGH → HAK May 13, 06:25 UTCMay 13, 06:50 UTC25m
2026-05-12 UEA2264 HGH → HAK May 12, 09:45 UTCMay 13, 06:50 UTC21h 5m
2026-05-12 UEA2264 HGH → HAK May 12, 06:15 UTCMay 12, 06:35 UTC20m
2026-05-11 UEA2220 SZX → CTU May 11, 12:10 UTCMay 11, 12:25 UTC15m
2026-05-11 UEA2219 CTU → SZX May 11, 10:30 UTCMay 11, 10:40 UTC10m
2026-05-10 UEA2218 SZX → CTU May 10, 03:40 UTCMay 10, 03:55 UTC15m
2026-05-08 UEA2220 SZX → CTU May 8, 12:25 UTCMay 8, 12:34 UTC10m
2026-05-08 UEA2219 CTU → SZX May 8, 10:49 UTCMay 8, 10:59 UTC10m
2026-05-07 UEA2218 SZX → CTU May 7, 03:50 UTCMay 7, 04:00 UTC10m
2026-05-06 UEA2218 SZX → CTU May 6, 03:45 UTCMay 6, 04:00 UTC15m
2026-05-05 UEA2264 HGH → HAK May 5, 06:30 UTCMay 5, 06:50 UTC20m
2026-05-03 UEA2220 SZX → CTU May 3, 14:00 UTCMay 3, 14:10 UTC10m
2026-05-03 UEA2219 CTU → SZX May 3, 11:50 UTCMay 3, 12:05 UTC15m
2026-05-02 UEA2220 SZX → CTU May 2, 12:25 UTCMay 2, 12:40 UTC15m
2026-05-02 UEA2219 CTU → SZX May 2, 10:30 UTCMay 2, 10:40 UTC10m
2026-05-01 UEA2220 SZX → CTU May 1, 12:15 UTCMay 1, 12:25 UTC10m
2026-04-30 UEA2220 SZX → CTU Apr 30, 12:20 UTCApr 30, 12:30 UTC10m
2026-04-29 UEA2264 HGH → HAK Apr 29, 07:45 UTCApr 29, 08:05 UTC20m
2026-04-28 UEA2220 SZX → CTU Apr 28, 13:20 UTCApr 28, 13:35 UTC15m
2026-04-27 UEA2264 HGH → HAK Apr 27, 06:35 UTCApr 27, 11:45 UTC5h 10m
2026-04-26 UEA2264 HGH → HAK Apr 26, 10:00 UTCApr 27, 07:00 UTC21h 0m
2026-04-26 UEA2264 HGH → HAK Apr 26, 06:35 UTCApr 26, 10:10 UTC3h 35m
2026-04-25 UEA2264 HGH → HAK Apr 25, 12:20 UTCApr 26, 10:10 UTC21h 50m
2026-04-25 UEA2264 HGH → HAK Apr 25, 12:10 UTCApr 26, 10:10 UTC22h 0m
2026-04-20 UEA2220 SZX → CTU Apr 20, 13:35 UTCApr 20, 13:50 UTC15m
2026-04-20 UEA2219 CTU → SZX Apr 20, 11:05 UTCApr 20, 11:15 UTC10m
2026-04-19 UEA2264 HGH → HAK Apr 19, 07:10 UTCApr 19, 10:15 UTC3h 5m
2026-04-18 UEA2264 HGH → HAK Apr 18, 09:55 UTCApr 19, 07:30 UTC21h 35m
2026-04-18 UEA2264 HGH → HAK Apr 18, 06:35 UTCApr 18, 06:55 UTC20m
2026-04-17 UEA2220 SZX → CTU Apr 17, 15:50 UTCApr 17, 16:05 UTC15m
2026-04-17 UEA2219 CTU → SZX Apr 17, 14:20 UTCApr 17, 14:30 UTC10m
2026-04-16 UEA2220 SZX → CTU Apr 16, 12:14 UTCApr 16, 12:34 UTC20m
2026-04-15 UEA1969 - Apr 15, 03:05 UTCApr 15, 03:15 UTC10m
2026-04-13 UEA2218 - Apr 13, 03:45 UTCApr 13, 03:55 UTC10m
2026-04-13 UEA2217 CTU → SZX Apr 13, 02:15 UTCApr 13, 02:25 UTC10m

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 B-32F9 page for operator, model, and routing details .

Mode-S 781FC9 frequently asked

What is Mode-S code 781FC9?
781FC9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32F9.
Where is Mode-S 781FC9 registered?
Mode-S code 781FC9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FC9 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 781FC9, octal 36017711, decimal 7,872,457.
What flights does 781FC9 operate?
Mode-S 781FC9 has broadcast 6 distinct callsigns, including UEA2264, UEA2220, UEA2219, UEA2218, UEA2217.