Apparatus

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sensors Mode-S transponder

7812A1

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1343 · BOEING 787-9 Dreamliner

Hex
7812A1
Octal
36011241
Decimal
7,869,089
Country
CN
Tail
B-1343
Type
B789
No current signal · last broadcast 42m ago
Flights observed
146
Distinct callsigns
20
Country
CN
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 7812A1.

Country allocation

The ICAO 24-bit address 7812A1 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
CHH757 - 8 2026-06-28
CHH472 - 7 2026-07-12
CHH7706 - 6 2026-07-07
CHH758 - 6 2026-06-29
CHH489 Hainan Airlines 6 2026-05-15
CHH7711 - 5 2026-06-28
CHH7707 - 5 2026-07-07
CHH7703 - 5 2026-06-14
CHH492 Hainan Airlines 5 2026-05-18
CHH490 Hainan Airlines 5 2026-05-15
CHH471 - 5 2026-07-11
CHH7713 - 4 2026-07-06
CHH7712 Hainan Airlines 4 2026-04-30
CHH7396 Hainan Airlines 4 2026-05-21
CHH7851 - 3 2026-07-09
CHH730 Hainan Airlines 3 2026-04-25
CHH491 Hainan Airlines 3 2026-05-17
CHH7970 Hainan Airlines 2 2026-05-05
CHH7907 Hainan Airlines 2 2026-06-10
CHH785 - 2 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CHH7605 - Jul 14, 08:05 UTCJul 14, 08:15 UTC10m
2026-07-14 CHH7603 - Jul 14, 01:20 UTCJul 14, 01:35 UTC15m
2026-07-12 CHH472 - Jul 12, 19:55 UTCJul 12, 20:10 UTC15m
2026-07-12 CHH472 - Jul 12, 11:55 UTCJul 12, 18:10 UTC6h 15m
2026-07-11 CHH471 - Jul 11, 20:50 UTCJul 12, 04:20 UTC7h 30m
2026-07-11 CHH471 - Jul 11, 18:30 UTCJul 11, 18:40 UTC10m
2026-07-09 CHH7851 - Jul 9, 00:20 UTCJul 9, 00:35 UTC15m
2026-07-08 CHH760 - Jul 8, 20:30 UTCJul 8, 20:40 UTC10m
2026-07-08 CHH760 - Jul 8, 09:55 UTCJul 8, 16:05 UTC6h 10m
2026-07-07 CHH759 - Jul 7, 23:00 UTCJul 8, 05:20 UTC6h 20m
2026-07-07 CHH759 - Jul 7, 18:00 UTCJul 7, 18:10 UTC10m
2026-07-07 CHH7707 - Jul 7, 12:35 UTCJul 7, 12:55 UTC20m
2026-07-07 CHH7706 - Jul 7, 07:45 UTCJul 7, 07:55 UTC10m
2026-07-06 CHH7713 - Jul 6, 19:30 UTCJul 6, 20:20 UTC50m
2026-07-06 CHH7713 - Jul 6, 17:00 UTCJul 6, 17:20 UTC20m
2026-07-05 CHH7157 - Jul 5, 23:50 UTCJul 6, 00:00 UTC10m
2026-07-05 CHH472 - Jul 5, 19:50 UTCJul 5, 20:10 UTC20m
2026-07-05 CHH472 - Jul 5, 12:00 UTCJul 5, 18:05 UTC6h 5m
2026-07-04 CHH471 - Jul 4, 20:00 UTCJul 5, 03:50 UTC7h 50m
2026-07-04 CHH471 - Jul 4, 18:05 UTCJul 4, 18:20 UTC15m
2026-06-29 CHH7851 - Jun 29, 23:14 UTCJun 29, 23:29 UTC15m
2026-06-29 CHH758 - Jun 29, 09:40 UTCJun 29, 11:50 UTC2h 10m
2026-06-28 CHH757 - Jun 28, 22:45 UTCJun 29, 05:34 UTC6h 50m
2026-06-28 CHH757 - Jun 28, 17:55 UTCJun 28, 18:10 UTC15m
2026-06-28 CHH7711 - Jun 28, 13:25 UTCJun 28, 13:49 UTC25m
2026-06-28 CHH7711 - Jun 28, 11:00 UTCJun 28, 11:25 UTC25m
2026-06-28 CHH7706 - Jun 28, 05:40 UTCJun 28, 05:49 UTC10m
2026-06-27 CHH7711 - Jun 27, 12:45 UTCJun 27, 13:00 UTC15m
2026-06-27 CHH7706 - Jun 27, 07:49 UTCJun 27, 07:59 UTC10m
2026-06-27 CHH7706 - Jun 27, 05:19 UTCJun 27, 05:29 UTC10m
2026-06-26 CHH758 - Jun 26, 21:35 UTCJun 26, 21:45 UTC10m
2026-06-26 CHH758 - Jun 26, 11:05 UTCJun 26, 17:15 UTC6h 10m
2026-06-26 CHH757 - Jun 26, 00:39 UTCJun 26, 07:35 UTC6h 55m
2026-06-25 CHH757 - Jun 25, 19:44 UTCJun 25, 19:54 UTC10m
2026-06-23 CHH7851 - Jun 23, 23:05 UTCJun 23, 23:14 UTC10m
2026-06-22 CHH758 - Jun 22, 21:00 UTCJun 22, 21:19 UTC20m
2026-06-22 CHH758 - Jun 22, 09:49 UTCJun 22, 16:10 UTC6h 20m
2026-06-21 CHH757 - Jun 21, 22:49 UTCJun 22, 05:40 UTC6h 50m
2026-06-21 CHH757 - Jun 21, 17:45 UTCJun 21, 17:54 UTC10m
2026-06-21 CHH7476 TFU → SZX Jun 21, 14:50 UTCJun 21, 14:59 UTC10m
2026-06-21 CHH7475 - Jun 21, 08:10 UTCJun 21, 08:20 UTC10m
2026-06-20 CHH7158 - Jun 20, 04:39 UTCJun 20, 04:49 UTC10m
2026-06-19 CHH786 - Jun 19, 08:54 UTCJun 20, 00:29 UTC15h 35m
2026-06-18 CHH785 - Jun 18, 19:45 UTCJun 19, 05:40 UTC9h 54m
2026-06-18 CHH785 - Jun 18, 15:40 UTCJun 18, 15:55 UTC15m
2026-06-17 CHH7992 - Jun 17, 10:50 UTCJun 17, 14:20 UTC3h 30m
2026-06-16 CHH7991 - Jun 16, 22:25 UTCJun 17, 05:00 UTC6h 35m
2026-06-16 CHH7357 SZX → CKG Jun 16, 13:30 UTCJun 16, 13:44 UTC15m
2026-06-15 CHH762 BUD → SZX Jun 15, 20:20 UTCJun 15, 20:30 UTC10m
2026-06-15 CHH762 BUD → SZX Jun 15, 10:15 UTCJun 15, 13:15 UTC3h 0m

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-1343 page for operator, model, and routing details .

Mode-S 7812A1 frequently asked

What is Mode-S code 7812A1?
7812A1 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1343.
Where is Mode-S 7812A1 registered?
Mode-S code 7812A1 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812A1 broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812A1, octal 36011241, decimal 7,869,089.
What flights does 7812A1 operate?
Mode-S 7812A1 has broadcast 20 distinct callsigns, including CHH757, CHH472, CHH7706, CHH758, CHH489.