Apparatus

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sensors Mode-S transponder

781F0B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-222T · BOEING 737-800

Hex
781F0B
Octal
36017413
Decimal
7,872,267
Country
CN
Tail
B-222T
Type
B738
No current signal · last broadcast 1d ago
Flights observed
48
Distinct callsigns
7
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781F0B.

Country allocation

The ICAO 24-bit address 781F0B 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 7 distinct

Callsign Airline Flights Last seen
CYZ291 - 20 2026-07-03
CYZ292 - 16 2026-07-03
CYZ9039 - 4 2026-06-18
CYZ279 - 3 2026-06-28
CYZ280 - 2 2026-06-28
CYZ202 China Postal Airlines 1 2026-05-14
CYZ201 China Postal Airlines 1 2026-05-14

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-07-03 CYZ292 - Jul 3, 09:45 UTCJul 3, 10:10 UTC25m
2026-07-03 CYZ291 - Jul 3, 08:10 UTCJul 3, 08:35 UTC25m
2026-07-01 CYZ292 - Jul 1, 09:30 UTCJul 1, 10:35 UTC1h 5m
2026-07-01 CYZ291 - Jul 1, 07:30 UTCJul 1, 07:55 UTC25m
2026-06-30 CYZ292 - Jun 30, 06:30 UTCJun 30, 06:55 UTC25m
2026-06-30 CYZ291 - Jun 30, 04:50 UTCJun 30, 05:20 UTC30m
2026-06-28 CYZ280 - Jun 28, 07:34 UTCJun 28, 09:39 UTC2h 5m
2026-06-28 CYZ279 - Jun 28, 03:59 UTCJun 28, 06:10 UTC2h 10m
2026-06-27 CYZ279 - Jun 27, 06:19 UTCJun 28, 04:35 UTC22h 15m
2026-06-27 CYZ291 - Jun 27, 03:49 UTCJun 27, 05:04 UTC1h 15m
2026-06-25 CYZ292 - Jun 25, 09:20 UTCJun 25, 09:45 UTC25m
2026-06-25 CYZ291 - Jun 25, 07:45 UTCJun 25, 08:20 UTC35m
2026-06-25 - - Jun 25, 06:20 UTCJun 25, 06:35 UTC15m
2026-06-24 CYZ292 - Jun 24, 06:59 UTCJun 24, 07:20 UTC20m
2026-06-24 CYZ291 - Jun 24, 05:20 UTCJun 24, 05:49 UTC30m
2026-06-23 CYZ292 - Jun 23, 06:44 UTCJun 23, 07:05 UTC20m
2026-06-23 CYZ291 - Jun 23, 04:39 UTCJun 23, 05:00 UTC20m
2026-06-19 CYZ280 - Jun 19, 10:24 UTCJun 20, 04:44 UTC18h 20m
2026-06-19 CYZ279 - Jun 19, 06:39 UTCJun 19, 08:40 UTC2h 0m
2026-06-18 CYZ9039 - Jun 18, 18:10 UTCJun 18, 18:20 UTC10m
2026-06-18 CYZ292 - Jun 18, 06:25 UTCJun 18, 07:15 UTC50m
2026-06-18 CYZ291 - Jun 18, 04:50 UTCJun 18, 05:10 UTC20m
2026-06-18 CYZ291 - Jun 18, 03:25 UTCJun 18, 04:05 UTC40m
2026-06-16 CYZ292 - Jun 16, 06:50 UTCJun 16, 07:15 UTC25m
2026-06-16 CYZ291 - Jun 16, 05:10 UTCJun 16, 05:40 UTC30m
2026-06-13 CYZ292 - Jun 13, 06:20 UTCJun 13, 06:45 UTC25m
2026-06-12 CYZ291 - Jun 12, 17:30 UTCJun 13, 05:00 UTC11h 30m
2026-06-11 CYZ292 - Jun 11, 08:15 UTCJun 11, 08:35 UTC20m
2026-06-11 CYZ291 - Jun 11, 05:15 UTCJun 11, 05:35 UTC20m
2026-06-10 CYZ292 - Jun 10, 08:50 UTCJun 10, 09:20 UTC30m
2026-06-10 CYZ291 - Jun 10, 06:05 UTCJun 10, 07:20 UTC1h 15m
2026-06-09 CYZ291 - Jun 9, 11:50 UTCJun 10, 07:20 UTC19h 30m
2026-06-09 CYZ291 - Jun 9, 08:50 UTCJun 9, 09:55 UTC1h 5m
2026-06-03 CYZ292 - Jun 3, 06:45 UTCJun 3, 07:45 UTC1h 0m
2026-06-03 CYZ291 - Jun 3, 04:50 UTCJun 3, 05:15 UTC25m
2026-06-02 CYZ292 - Jun 2, 06:25 UTCJun 2, 07:05 UTC40m
2026-06-02 CYZ291 - Jun 2, 04:10 UTCJun 2, 05:15 UTC1h 5m
2026-05-27 CYZ9039 - May 27, 17:20 UTCMay 27, 17:30 UTC10m
2026-05-24 CYZ9039 - May 24, 17:20 UTCMay 24, 17:45 UTC25m
2026-05-23 CYZ292 - May 23, 06:00 UTCMay 23, 07:00 UTC1h 0m
2026-05-23 CYZ291 - May 23, 04:00 UTCMay 23, 05:00 UTC1h 0m
2026-05-19 CYZ9039 - May 19, 17:45 UTCMay 19, 17:55 UTC10m
2026-05-19 CYZ292 - May 19, 06:40 UTCMay 19, 07:00 UTC20m
2026-05-19 CYZ291 - May 19, 04:45 UTCMay 19, 05:15 UTC30m
2026-05-17 CYZ292 - May 17, 07:05 UTCMay 17, 17:40 UTC10h 35m
2026-05-17 CYZ291 - May 17, 04:50 UTCMay 17, 05:15 UTC25m
2026-05-14 CYZ202 ICN → XIY May 14, 11:35 UTCMay 15, 00:35 UTC13h 0m
2026-05-14 CYZ201 XIY → ICN May 14, 09:50 UTCMay 14, 10:10 UTC20m

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-222T page for operator, model, and routing details .

Mode-S 781F0B frequently asked

What is Mode-S code 781F0B?
781F0B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-222T.
Where is Mode-S 781F0B registered?
Mode-S code 781F0B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F0B 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 781F0B, octal 36017413, decimal 7,872,267.
What flights does 781F0B operate?
Mode-S 781F0B has broadcast 7 distinct callsigns, including CYZ291, CYZ292, CYZ9039, CYZ279, CYZ280.