Apparatus

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sensors Mode-S transponder

7812FF

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1381 · BOEING 737 MAX 8

Hex
7812FF
Octal
36011377
Decimal
7,869,183
Country
CN
Tail
B-1381
Type
B38M
No current signal · last broadcast Jul 26, 17:35 UTC
Flights observed
176
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 17:35 UTC

Last known position

Most recent position reported by Mode-S 7812FF.

Country allocation

The ICAO 24-bit address 7812FF 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
CSH858 Shanghai Airlines 13 2026-05-30
CSH853 - 13 2026-07-06
CSH833 - 11 2026-07-09
CSH861 - 10 2026-07-09
CSH855 - 10 2026-07-15
CSH862 - 9 2026-07-05
CSH841 - 9 2026-07-16
CSH834 - 9 2026-07-10
CSH857 Shanghai Airlines 8 2026-05-29
CSH811 - 8 2026-07-09
CSH877 - 7 2026-06-15
CSH856 - 7 2026-07-13
CSH878 Shanghai Airlines 6 2026-06-08
CSH863 Shanghai Airlines 6 2026-07-24
CSH854 - 6 2026-07-03
CSH842 - 6 2026-07-17
CSH866 Shanghai Airlines 5 2026-07-26
CSH865 Shanghai Airlines 5 2026-07-25
CSH847 Shanghai Airlines 5 2026-05-26
CSH9255 - 4 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSH866 KUL → PVG Jul 26, 13:15 UTCJul 26, 17:35 UTC4h 20m
2026-07-25 CSH865 PVG → KUL Jul 25, 16:10 UTCJul 26, 11:45 UTC19h 36m
2026-07-25 CSH866 - Jul 25, 13:50 UTCJul 25, 14:00 UTC10m
2026-07-25 CSH865 PVG → KUL Jul 25, 12:00 UTCJul 25, 12:20 UTC20m
2026-07-24 CSH864 KUL → PVG Jul 24, 23:40 UTCJul 25, 09:55 UTC10h 15m
2026-07-24 CSH863 PVG → KUL Jul 24, 17:40 UTCJul 24, 22:15 UTC4h 35m
2026-07-23 CSH863 - Jul 23, 20:10 UTCJul 24, 19:00 UTC22h 50m
2026-07-23 CSH832 - Jul 23, 17:50 UTCJul 24, 17:45 UTC23h 55m
2026-07-23 CSH831 - Jul 23, 04:15 UTCJul 23, 20:20 UTC16h 5m
2026-07-17 CSH9068 - Jul 17, 05:10 UTCJul 17, 13:50 UTC8h 40m
2026-07-17 CSH842 - Jul 17, 02:54 UTCJul 17, 03:10 UTC15m
2026-07-16 CSH841 - Jul 16, 18:15 UTCJul 16, 18:34 UTC20m
2026-07-16 CSH841 - Jul 16, 10:15 UTCJul 16, 16:19 UTC6h 5m
2026-07-15 CSH841 - Jul 15, 14:50 UTCJul 16, 10:59 UTC20h 10m
2026-07-15 CSH841 - Jul 15, 12:40 UTCJul 16, 10:59 UTC22h 20m
2026-07-15 CSH855 - Jul 15, 10:55 UTCJul 15, 11:10 UTC15m
2026-07-14 CSH832 - Jul 14, 17:40 UTCJul 15, 09:40 UTC15h 59m
2026-07-14 CSH831 - Jul 14, 13:10 UTCJul 14, 15:05 UTC1h 55m
2026-07-13 CSH831 - Jul 13, 14:35 UTCJul 14, 13:25 UTC22h 50m
2026-07-13 CSH856 - Jul 13, 12:20 UTCJul 13, 14:45 UTC2h 25m
2026-07-13 CSH855 - Jul 13, 10:15 UTCJul 13, 10:35 UTC20m
2026-07-12 CSH9088 - Jul 12, 16:55 UTCJul 13, 09:00 UTC16h 5m
2026-07-12 CSH856 - Jul 12, 14:45 UTCJul 12, 15:01 UTC15m
2026-07-12 CSH855 - Jul 12, 13:05 UTCJul 12, 13:30 UTC25m
2026-07-12 CSH855 - Jul 12, 11:10 UTCJul 12, 11:20 UTC10m
2026-07-11 CSH7222 - Jul 11, 06:50 UTCJul 11, 09:40 UTC2h 50m
2026-07-10 CSH834 - Jul 10, 10:10 UTCJul 11, 05:31 UTC19h 21m
2026-07-09 CSH833 - Jul 9, 18:00 UTCJul 10, 08:30 UTC14h 30m
2026-07-09 CSH861 - Jul 9, 07:20 UTCJul 9, 16:40 UTC9h 20m
2026-07-09 CSH811 - Jul 9, 04:00 UTCJul 9, 05:20 UTC1h 20m
2026-07-08 CSH9255 - Jul 8, 03:40 UTCJul 8, 08:20 UTC4h 40m
2026-07-07 CSH842 - Jul 7, 03:00 UTCJul 7, 03:25 UTC25m
2026-07-06 CSH853 - Jul 6, 06:20 UTCJul 6, 14:35 UTC8h 15m
2026-07-06 CSH811 - Jul 6, 04:10 UTCJul 6, 04:25 UTC15m
2026-07-05 CSH862 - Jul 5, 18:55 UTCJul 6, 03:35 UTC8h 40m
2026-07-05 CSH861 - Jul 5, 13:05 UTCJul 5, 17:10 UTC4h 5m
2026-07-04 CSH9068 CGQ → PVG Jul 4, 14:40 UTCJul 4, 15:15 UTC35m
2026-07-03 CSH854 - Jul 3, 05:15 UTCJul 3, 07:40 UTC2h 25m
2026-07-02 CSH853 - Jul 2, 13:05 UTCJul 2, 15:20 UTC2h 15m
2026-07-01 CSH862 - Jul 1, 18:40 UTCJul 1, 22:45 UTC4h 5m
2026-07-01 CSH861 - Jul 1, 03:05 UTCJul 1, 16:20 UTC13h 15m
2026-06-30 CSH9255 - Jun 30, 15:55 UTCJul 1, 12:35 UTC20h 40m
2026-06-30 CSH866 KUL → PVG Jun 30, 12:45 UTCJul 1, 07:10 UTC18h 25m
2026-06-29 CSH865 - Jun 29, 23:14 UTCJun 30, 11:25 UTC12h 11m
2026-06-29 CSH863 - Jun 29, 21:05 UTCJun 29, 21:19 UTC15m
2026-06-29 CSH834 - Jun 29, 10:00 UTCJun 29, 18:14 UTC8h 15m
2026-06-28 CSH833 - Jun 28, 15:40 UTCJun 29, 08:24 UTC16h 45m
2026-06-28 CSH866 KUL → PVG Jun 28, 12:25 UTCJun 29, 08:24 UTC20h 0m
2026-06-27 CSH865 - Jun 27, 23:10 UTCJun 28, 11:00 UTC11h 50m
2026-06-27 CSH863 - Jun 27, 17:14 UTCJun 27, 21:29 UTC4h 15m

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-1381 page for operator, model, and routing details .

Mode-S 7812FF frequently asked

What is Mode-S code 7812FF?
7812FF is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1381.
Where is Mode-S 7812FF registered?
Mode-S code 7812FF is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812FF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812FF, octal 36011377, decimal 7,869,183.
What flights does 7812FF operate?
Mode-S 7812FF has broadcast 20 distinct callsigns, including CSH858, CSH853, CSH833, CSH861, CSH855.