Apparatus

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sensors Mode-S transponder

7811AA

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1477 · BOEING 737-800

Hex
7811AA
Octal
36010652
Decimal
7,868,842
Country
CN
Tail
B-1477
Type
B738
No current signal · last broadcast 2d ago
Flights observed
177
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 7811AA.

Country allocation

The ICAO 24-bit address 7811AA 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 20 distinct

Callsign Airline Flights Last seen
CSZ9451 - 15 2026-07-09
CSZ9323 - 7 2026-07-09
CSZ8862 - 6 2026-06-26
CSZ9368 Shenzhen Airlines 5 2026-05-11
CSZ8861 Shenzhen Airlines 5 2026-06-25
CSZ9452 - 4 2026-07-07
CSZ8966 - 4 2026-07-01
CSZ8934 - 4 2026-07-05
CSZ8105 - 4 2026-06-24
CSZ634 - 4 2026-06-30
CSZ633 - 4 2026-06-30
CSZ9366 Shenzhen Airlines 3 2026-05-06
CSZ9130 - 3 2026-07-03
CSZ8985 - 3 2026-06-30
CSZ8965 - 3 2026-07-01
CSZ8933 - 3 2026-07-05
CSZ8918 - 3 2026-07-13
CSZ8663 Shenzhen Airlines 3 2026-04-27
CSZ8662 - 3 2026-07-10
CSZ8536 Shenzhen Airlines 3 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 CSZ9853 - Jul 15, 12:50 UTCJul 15, 13:00 UTC10m
2026-07-15 CSZ9301 - Jul 15, 01:10 UTCJul 15, 01:20 UTC10m
2026-07-14 - - Jul 14, 13:55 UTCJul 14, 14:05 UTC10m
2026-07-14 CSZ9457 - Jul 14, 08:05 UTCJul 14, 08:15 UTC10m
2026-07-13 CSZ8918 - Jul 13, 07:55 UTCJul 13, 13:25 UTC5h 30m
2026-07-13 CSZ8917 - Jul 13, 06:45 UTCJul 13, 06:55 UTC10m
2026-07-13 CSZ8932 - Jul 13, 04:25 UTCJul 13, 04:40 UTC15m
2026-07-13 CSZ8931 - Jul 13, 00:01 UTCJul 13, 00:10 UTC10m
2026-07-11 CSZ9126 - Jul 11, 14:40 UTCJul 11, 15:00 UTC20m
2026-07-11 CSZ9125 - Jul 11, 07:00 UTCJul 11, 07:10 UTC10m
2026-07-11 CSZ9310 - Jul 11, 05:20 UTCJul 11, 05:40 UTC20m
2026-07-10 CSZ9309 - Jul 10, 23:10 UTCJul 10, 23:20 UTC10m
2026-07-10 CSZ8662 - Jul 10, 17:30 UTCJul 10, 17:50 UTC20m
2026-07-09 CSZ8665 - Jul 9, 15:15 UTCJul 9, 15:25 UTC10m
2026-07-09 CSZ9323 - Jul 9, 08:25 UTCJul 9, 08:35 UTC10m
2026-07-09 CSZ9451 - Jul 9, 00:10 UTCJul 9, 00:25 UTC15m
2026-07-08 CSZ9407 - Jul 8, 09:45 UTCJul 8, 10:00 UTC15m
2026-07-08 CSZ9451 - Jul 8, 02:00 UTCJul 8, 02:10 UTC10m
2026-07-07 CSZ8918 - Jul 7, 21:20 UTCJul 7, 21:35 UTC15m
2026-07-07 CSZ8918 - Jul 7, 19:45 UTCJul 7, 20:30 UTC45m
2026-07-07 CSZ8917 - Jul 7, 14:25 UTCJul 7, 14:35 UTC10m
2026-07-07 CSZ9452 - Jul 7, 07:00 UTCJul 7, 07:10 UTC10m
2026-07-07 CSZ9451 - Jul 7, 00:55 UTCJul 7, 01:10 UTC15m
2026-07-06 CSZ9640 - Jul 6, 05:25 UTCJul 6, 13:30 UTC8h 5m
2026-07-06 CSZ9639 - Jul 6, 03:10 UTCJul 6, 03:20 UTC10m
2026-07-05 CSZ8934 - Jul 5, 18:15 UTCJul 5, 18:35 UTC20m
2026-07-05 CSZ8933 - Jul 5, 14:00 UTCJul 5, 14:10 UTC10m
2026-07-05 CSZ9323 - Jul 5, 07:15 UTCJul 5, 07:35 UTC20m
2026-07-05 CSZ9451 - Jul 5, 00:05 UTCJul 5, 00:25 UTC20m
2026-07-04 CSZ9324 - Jul 4, 14:45 UTCJul 4, 14:55 UTC10m
2026-07-04 CSZ9323 - Jul 4, 10:45 UTCJul 4, 11:00 UTC15m
2026-07-04 CSZ9451 - Jul 4, 02:30 UTCJul 4, 02:45 UTC15m
2026-07-03 CSZ9949 - Jul 3, 14:25 UTCJul 3, 14:35 UTC10m
2026-07-03 CSZ9130 - Jul 3, 12:20 UTCJul 3, 12:35 UTC15m
2026-07-03 CSZ9129 - Jul 3, 03:35 UTCJul 3, 03:45 UTC10m
2026-07-03 CSZ9952 - Jul 3, 01:20 UTCJul 3, 01:30 UTC10m
2026-07-02 CSZ9949 - Jul 2, 13:10 UTCJul 2, 13:20 UTC10m
2026-07-02 CSZ9130 - Jul 2, 11:35 UTCJul 2, 11:50 UTC15m
2026-07-02 CSZ9129 - Jul 2, 03:20 UTCJul 2, 03:30 UTC10m
2026-07-01 CSZ9128 - Jul 1, 15:40 UTCJul 1, 15:55 UTC15m
2026-07-01 CSZ9127 - Jul 1, 08:55 UTCJul 1, 09:05 UTC10m
2026-07-01 CSZ8966 - Jul 1, 06:35 UTCJul 1, 07:00 UTC25m
2026-07-01 CSZ8965 - Jul 1, 00:50 UTCJul 1, 01:00 UTC10m
2026-06-30 CSZ8986 - Jun 30, 16:35 UTCJun 30, 16:45 UTC10m
2026-06-30 CSZ8985 - Jun 30, 11:30 UTCJun 30, 11:40 UTC10m
2026-06-30 CSZ634 - Jun 30, 09:55 UTCJun 30, 10:05 UTC10m
2026-06-30 CSZ634 - Jun 30, 06:50 UTCJun 30, 07:35 UTC45m
2026-06-30 CSZ633 - Jun 30, 04:45 UTCJun 30, 05:30 UTC45m
2026-06-30 CSZ633 - Jun 30, 02:35 UTCJun 30, 02:45 UTC10m
2026-06-30 CSZ9896 - Jun 30, 00:00 UTCJun 30, 00:25 UTC25m

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-1477 page for operator, model, and routing details .

Mode-S 7811AA frequently asked

What is Mode-S code 7811AA?
7811AA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1477.
Where is Mode-S 7811AA registered?
Mode-S code 7811AA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7811AA broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7811AA, octal 36010652, decimal 7,868,842.
What flights does 7811AA operate?
Mode-S 7811AA has broadcast 20 distinct callsigns, including CSZ9451, CSZ9323, CSZ8862, CSZ9368, CSZ8861.