Apparatus

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sensors Mode-S transponder

781109

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-7377 · BOEING 737-800

Hex
781109
Octal
36010411
Decimal
7,868,681
Country
CN
Tail
B-7377
Type
B738
No current signal · last broadcast Jul 22, 12:20 UTC
Flights observed
85
Distinct callsigns
19
Country
CN
Last broadcast
Jul 22, 12:20 UTC

Last known position

Most recent position reported by Mode-S 781109.

Country allocation

The ICAO 24-bit address 781109 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 19 distinct

Callsign Airline Flights Last seen
FZA6652 - 30 2026-07-17
FZA6651 - 9 2026-07-17
FZA6510 - 8 2026-07-12
FZA6635 - 6 2026-06-20
FZA6720 Fuzhou Airlines 3 2026-06-13
FZA6718 Fuzhou Airlines 3 2026-07-22
FZA6636 Fuzhou Airlines 3 2026-05-21
FZA6598 - 3 2026-06-26
FZA6597 - 3 2026-06-25
FZA6532 - 3 2026-06-21
FZA6531 - 3 2026-07-18
FZA6768 - 2 2026-05-15
FZA6767 - 2 2026-05-13
FZA6573 Fuzhou Airlines 2 2026-05-12
FZA6748 - 1 2026-06-30
FZA6648 - 1 2026-06-27
FZA6647 - 1 2026-06-24
FZA6512 Fuzhou Airlines 1 2026-06-17
FZA6509 - 1 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 FZA6718 HRB → HSN Jul 22, 11:35 UTCJul 22, 12:20 UTC45m
2026-07-18 FZA6531 - Jul 18, 01:05 UTCJul 18, 04:25 UTC3h 21m
2026-07-17 FZA6652 - Jul 17, 09:30 UTCJul 17, 09:40 UTC10m
2026-07-17 FZA6651 - Jul 17, 08:10 UTCJul 17, 08:20 UTC10m
2026-07-15 FZA6718 - Jul 15, 11:35 UTCJul 15, 12:20 UTC45m
2026-07-12 FZA6510 - Jul 12, 14:15 UTCJul 12, 15:10 UTC55m
2026-07-10 FZA6652 - Jul 10, 09:55 UTCJul 10, 10:05 UTC10m
2026-07-10 FZA6509 - Jul 10, 02:45 UTCJul 10, 02:55 UTC10m
2026-07-08 FZA6652 - Jul 8, 12:40 UTCJul 8, 17:20 UTC4h 40m
2026-07-08 FZA6651 - Jul 8, 10:45 UTCJul 8, 11:00 UTC15m
2026-07-06 FZA6718 - Jul 6, 11:40 UTCJul 6, 12:20 UTC40m
2026-06-30 FZA6748 - Jun 30, 15:45 UTCJun 30, 16:10 UTC25m
2026-06-29 FZA6510 KMG → FOC Jun 29, 10:15 UTCJun 29, 14:25 UTC4h 10m
2026-06-27 FZA6648 - Jun 27, 02:29 UTCJun 27, 02:50 UTC20m
2026-06-26 FZA6598 - Jun 26, 09:05 UTCJun 26, 14:09 UTC5h 5m
2026-06-25 FZA6597 - Jun 25, 12:25 UTCJun 26, 07:00 UTC18h 35m
2026-06-24 FZA6647 - Jun 24, 14:20 UTCJun 25, 12:44 UTC22h 25m
2026-06-24 FZA6652 - Jun 24, 09:49 UTCJun 24, 14:20 UTC4h 30m
2026-06-24 FZA6652 - Jun 24, 09:09 UTCJun 24, 09:19 UTC10m
2026-06-21 FZA6532 - Jun 21, 13:09 UTCJun 21, 13:24 UTC15m
2026-06-21 FZA6531 - Jun 21, 06:29 UTCJun 21, 07:20 UTC50m
2026-06-20 FZA6635 - Jun 20, 06:45 UTCJun 20, 13:39 UTC6h 55m
2026-06-20 FZA6635 - Jun 20, 02:19 UTCJun 20, 02:35 UTC15m
2026-06-19 FZA6598 CSX → HRB Jun 19, 13:44 UTCJun 19, 13:59 UTC15m
2026-06-19 FZA6597 - Jun 19, 06:39 UTCJun 19, 06:59 UTC20m
2026-06-17 FZA6512 KWE → FOC Jun 17, 15:46 UTCJun 17, 15:55 UTC10m
2026-06-14 FZA6652 SZX → KMG Jun 14, 10:50 UTCJun 14, 15:30 UTC4h 40m
2026-06-14 FZA6652 SZX → KMG Jun 14, 10:05 UTCJun 14, 10:15 UTC10m
2026-06-14 FZA6651 KMG → SZX Jun 14, 08:25 UTCJun 14, 08:35 UTC10m
2026-06-13 FZA6720 CGQ → FOC Jun 13, 11:20 UTCJun 14, 02:15 UTC14h 55m
2026-06-13 FZA6720 CGQ → FOC Jun 13, 01:10 UTCJun 13, 12:15 UTC11h 4m
2026-06-12 FZA6720 CGQ → FOC Jun 12, 14:05 UTCJun 13, 12:15 UTC22h 9m
2026-06-12 FZA6652 SZX → KMG Jun 12, 09:00 UTCJun 13, 01:10 UTC16h 10m
2026-06-10 FZA6510 KMG → FOC Jun 10, 14:05 UTCJun 11, 07:45 UTC17h 40m
2026-06-10 FZA6652 SZX → KMG Jun 10, 10:05 UTCJun 11, 07:45 UTC21h 40m
2026-06-10 FZA6652 SZX → KMG Jun 10, 09:20 UTCJun 10, 09:30 UTC10m
2026-06-08 FZA6510 KMG → FOC Jun 8, 17:50 UTCJun 9, 08:30 UTC14h 40m
2026-06-08 FZA6652 SZX → KMG Jun 8, 13:15 UTCJun 9, 08:30 UTC19h 15m
2026-06-08 FZA6651 KMG → SZX Jun 8, 10:55 UTCJun 8, 11:05 UTC10m
2026-06-07 FZA6652 SZX → KMG Jun 7, 12:55 UTCJun 7, 17:20 UTC4h 25m
2026-06-05 FZA6652 SZX → KMG Jun 5, 10:20 UTCJun 5, 15:10 UTC4h 50m
2026-06-05 FZA6651 KMG → SZX Jun 5, 08:30 UTCJun 5, 08:50 UTC20m
2026-06-03 FZA6652 SZX → KMG Jun 3, 11:25 UTCJun 3, 15:15 UTC3h 50m
2026-06-03 FZA6652 SZX → KMG Jun 3, 10:40 UTCJun 3, 10:50 UTC10m
2026-06-03 FZA6651 KMG → SZX Jun 3, 07:25 UTCJun 3, 07:35 UTC10m
2026-06-01 FZA6652 SZX → KMG Jun 1, 10:20 UTCJun 2, 07:50 UTC21h 30m
2026-06-01 FZA6652 SZX → KMG Jun 1, 10:10 UTCJun 2, 07:50 UTC21h 40m
2026-05-31 FZA6652 SZX → KMG May 31, 10:55 UTCMay 31, 16:00 UTC5h 5m
2026-05-29 FZA6652 SZX → KMG May 29, 10:55 UTCMay 29, 11:20 UTC25m
2026-05-27 FZA6652 SZX → KMG May 27, 10:15 UTCMay 27, 15:25 UTC5h 10m

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-7377 page for operator, model, and routing details .

Mode-S 781109 frequently asked

What is Mode-S code 781109?
781109 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-7377.
Where is Mode-S 781109 registered?
Mode-S code 781109 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781109 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 12:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781109, octal 36010411, decimal 7,868,681.
What flights does 781109 operate?
Mode-S 781109 has broadcast 19 distinct callsigns, including FZA6652, FZA6651, FZA6510, FZA6635, FZA6720.