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 1d ago
Flights observed
84
Distinct callsigns
20
Country
CN
Last broadcast
1d 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
CHH489 Hainan Airlines 6 2026-05-15
CHH492 Hainan Airlines 5 2026-05-18
CHH490 Hainan Airlines 5 2026-05-15
CHH7712 Hainan Airlines 4 2026-04-30
CHH7707 Hainan Airlines 4 2026-05-23
CHH7703 Hainan Airlines 4 2026-05-02
CHH7396 Hainan Airlines 4 2026-05-21
CHH730 Hainan Airlines 3 2026-04-25
CHH491 Hainan Airlines 3 2026-05-17
CHH472 Hainan Airlines 3 2026-04-14
CHH7970 Hainan Airlines 2 2026-05-05
CHH7716 Hainan Airlines 2 2026-04-22
CHH7715 Hainan Airlines 2 2026-04-26
CHH7714 Hainan Airlines 2 2026-05-14
CHH7713 Hainan Airlines 2 2026-04-21
CHH7711 Hainan Airlines 2 2026-05-19
CHH7704 Hainan Airlines 2 2026-05-23
CHH7701 Hainan Airlines 2 2026-05-06
CHH757 Hainan Airlines 2 2026-05-21
CHH729 Hainan Airlines 2 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 CHH728 MAD → CKG May 28, 09:35 UTCMay 28, 14:30 UTC4h 55m
2026-05-27 CHH727 CKG → MAD May 27, 22:15 UTCMay 28, 05:55 UTC7h 40m
2026-05-26 CHH428 MXP → CKG May 26, 10:54 UTCMay 26, 14:55 UTC4h 0m
2026-05-26 CHH427 CKG → MXP May 26, 01:40 UTCMay 26, 05:30 UTC3h 50m
2026-05-25 CHH7357 SZX → CKG May 25, 12:30 UTCMay 25, 12:40 UTC10m
2026-05-25 CHH7394 HGH → SZX May 25, 06:15 UTCMay 25, 06:40 UTC25m
2026-05-24 CHH438 FCO → SZX May 24, 09:50 UTCMay 24, 13:30 UTC3h 40m
2026-05-23 CHH437 SZX → FCO May 23, 23:05 UTCMay 24, 05:55 UTC6h 50m
2026-05-23 CHH437 SZX → FCO May 23, 18:10 UTCMay 23, 18:20 UTC10m
2026-05-23 CHH7707 PEK → SZX May 23, 08:25 UTCMay 23, 08:50 UTC25m
2026-05-23 CHH7704 SZX → PEK May 23, 01:15 UTCMay 23, 01:25 UTC10m
2026-05-22 CHH758 CDG → SZX May 22, 09:40 UTCMay 22, 14:55 UTC5h 15m
2026-05-21 CHH757 SZX → CDG May 21, 23:40 UTCMay 22, 06:45 UTC7h 5m
2026-05-21 CHH757 SZX → CDG May 21, 18:30 UTCMay 21, 18:45 UTC15m
2026-05-21 CHH7396 HGH → SZX May 21, 13:35 UTCMay 21, 14:00 UTC25m
2026-05-20 CHH7396 HGH → SZX May 20, 22:40 UTCMay 20, 22:55 UTC15m
2026-05-20 CHH7396 HGH → SZX May 20, 14:25 UTCMay 20, 14:35 UTC10m
2026-05-19 CHH7711 PEK → SZX May 19, 12:35 UTCMay 19, 13:00 UTC25m
2026-05-19 CHH7711 PEK → SZX May 19, 10:00 UTCMay 19, 10:20 UTC20m
2026-05-18 CHH492 BRU → PEK May 18, 20:20 UTCMay 18, 20:35 UTC15m
2026-05-18 CHH492 BRU → PEK May 18, 11:35 UTCMay 18, 17:50 UTC6h 15m
2026-05-17 CHH491 PEK → BRU May 17, 21:55 UTCMay 18, 04:45 UTC6h 50m
2026-05-15 CHH490 BER → PEK May 15, 12:10 UTCMay 15, 17:45 UTC5h 34m
2026-05-15 CHH489 PEK → BER May 15, 03:55 UTCMay 15, 04:15 UTC20m
2026-05-14 CHH489 PEK → BER May 14, 22:15 UTCMay 15, 01:30 UTC3h 15m
2026-05-14 CHH7714 SZX → PEK May 14, 13:25 UTCMay 14, 13:35 UTC10m
2026-05-14 CHH7707 PEK → SZX May 14, 11:20 UTCMay 14, 11:30 UTC10m
2026-05-12 CHH492 BRU → PEK May 12, 11:30 UTCMay 12, 17:30 UTC6h 0m
2026-05-11 CHH491 PEK → BRU May 11, 21:00 UTCMay 12, 05:00 UTC8h 0m
2026-05-11 CHH7714 SZX → PEK May 11, 11:20 UTCMay 11, 11:30 UTC10m
2026-05-11 CHH7705 PEK → SZX May 11, 06:15 UTCMay 11, 06:35 UTC20m
2026-05-09 CHH492 BRU → PEK May 9, 19:55 UTCMay 9, 20:10 UTC15m
2026-05-09 CHH492 BRU → PEK May 9, 11:30 UTCMay 9, 17:30 UTC6h 0m
2026-05-08 CHH491 PEK → BRU May 8, 19:20 UTCMay 9, 05:20 UTC10h 0m
2026-05-06 CHH7706 SZX → PEK May 6, 05:20 UTCMay 6, 05:30 UTC10m
2026-05-06 CHH7701 PEK → SZX May 6, 03:00 UTCMay 6, 03:20 UTC20m
2026-05-06 CHH7701 PEK → SZX May 6, 00:40 UTCMay 6, 01:01 UTC20m
2026-05-05 CHH7970 BEG → PEK May 5, 17:45 UTCMay 5, 17:55 UTC10m
2026-05-05 CHH7970 BEG → PEK May 5, 09:05 UTCMay 5, 11:55 UTC2h 50m
2026-05-04 CHH7969 PEK → BEG May 4, 19:35 UTCMay 5, 05:50 UTC10h 15m
2026-05-04 CHH7182 PEK → HAK May 4, 05:30 UTCMay 4, 05:45 UTC15m
2026-05-02 CHH7703 PEK → SZX May 2, 04:35 UTCMay 2, 04:45 UTC10m
2026-05-02 CHH7703 PEK → SZX May 2, 01:45 UTCMay 2, 02:05 UTC20m
2026-05-01 CHH490 BER → PEK May 1, 20:05 UTCMay 1, 20:25 UTC20m
2026-05-01 CHH490 BER → PEK May 1, 11:55 UTCMay 1, 17:45 UTC5h 50m
2026-04-30 CHH489 PEK → BER Apr 30, 22:40 UTCMay 1, 04:35 UTC5h 55m
2026-04-30 CHH489 PEK → BER Apr 30, 19:35 UTCApr 30, 19:45 UTC10m
2026-04-30 CHH7712 SZX → PEK Apr 30, 13:30 UTCApr 30, 13:40 UTC10m
2026-04-30 CHH7712 SZX → PEK Apr 30, 11:00 UTCApr 30, 11:10 UTC10m
2026-04-29 CHH7722 PVG → SZX Apr 29, 11:05 UTCApr 29, 11:20 UTC15m

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 1d 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 CHH489, CHH492, CHH490, CHH7712, CHH7707.