Apparatus

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sensors Mode-S transponder

7812A4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1020 · AIRBUS A-330-300

Hex
7812A4
Octal
36011244
Decimal
7,869,092
Country
CN
Tail
B-1020
Type
A333
No current signal · last broadcast 9h ago
Flights observed
92
Distinct callsigns
20
Country
CN
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 7812A4.

Country allocation

The ICAO 24-bit address 7812A4 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
CHH753 Hainan Airlines 17 2026-05-24
CHH754 Hainan Airlines 12 2026-05-25
CHH408 Hainan Airlines 7 2026-05-01
CHH407 Hainan Airlines 7 2026-04-30
CHH752 Hainan Airlines 5 2026-05-21
CHH7938 Hainan Airlines 4 2026-05-29
CHH7937 Hainan Airlines 3 2026-05-29
CHH7801 Hainan Airlines 3 2026-05-18
CHH751 Hainan Airlines 3 2026-05-20
CHH7813 Hainan Airlines 2 2026-05-03
CHH7803 Hainan Airlines 2 2026-05-06
CHH7714 Hainan Airlines 2 2026-04-30
CHH7707 Hainan Airlines 2 2026-04-30
CHH769 Hainan Airlines 2 2026-04-27
CHH7277 Hainan Airlines 2 2026-05-03
CHH7814 Hainan Airlines 1 2026-05-04
CHH7809 Hainan Airlines 1 2026-05-04
CHH7807 Hainan Airlines 1 2026-04-19
CHH7806 Hainan Airlines 1 2026-05-04
CHH7716 Hainan Airlines 1 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CHH7938 LAX → PEK May 29, 20:45 UTCMay 29, 21:00 UTC15m
2026-05-29 CHH7938 LAX → PEK May 29, 12:05 UTCMay 29, 18:15 UTC6h 11m
2026-05-29 CHH7937 PEK → PRG May 29, 03:55 UTCMay 29, 04:10 UTC15m
2026-05-28 CHH7937 PEK → PRG May 28, 19:05 UTCMay 29, 01:25 UTC6h 20m
2026-05-28 CHH7677 PEK → HGH May 28, 10:20 UTCMay 28, 10:30 UTC10m
2026-05-28 CHH7382 PEK → HAK May 28, 00:30 UTCMay 28, 03:15 UTC2h 45m
2026-05-27 CHH7716 TNA → SZX May 27, 12:20 UTCMay 27, 12:35 UTC15m
2026-05-27 CHH7709 PEK → SZX May 27, 08:00 UTCMay 27, 08:20 UTC20m
2026-05-25 CHH754 MAN → PEK May 25, 11:40 UTCMay 25, 20:55 UTC9h 15m
2026-05-24 CHH753 PEK → MAN May 24, 23:00 UTCMay 25, 05:55 UTC6h 55m
2026-05-23 CHH754 MAN → PEK May 23, 11:25 UTCMay 23, 17:40 UTC6h 15m
2026-05-22 CHH753 PEK → MAN May 22, 23:00 UTCMay 23, 06:15 UTC7h 14m
2026-05-22 CHH753 PEK → MAN May 22, 01:50 UTCMay 22, 23:30 UTC21h 40m
2026-05-21 CHH752 DUB → PEK May 21, 20:30 UTCMay 21, 20:50 UTC20m
2026-05-21 CHH752 DUB → PEK May 21, 11:15 UTCMay 21, 17:55 UTC6h 40m
2026-05-20 CHH751 PEK → DUB May 20, 19:15 UTCMay 21, 05:35 UTC10h 20m
2026-05-19 CHH7347 PEK → TFU May 19, 06:50 UTCMay 19, 07:15 UTC25m
2026-05-18 CHH7801 PEK → CAN May 18, 00:55 UTCMay 18, 01:10 UTC15m
2026-05-17 CHH7607 PEK → SHA May 17, 09:05 UTCMay 17, 09:20 UTC15m
2026-05-13 CHH7706 SZX → PEK May 13, 05:20 UTCMay 13, 05:35 UTC15m
2026-05-13 CHH7701 PEK → SZX May 13, 03:20 UTCMay 13, 03:35 UTC15m
2026-05-12 CHH754 MAN → PEK May 12, 11:20 UTCMay 12, 17:45 UTC6h 25m
2026-05-11 CHH753 PEK → MAN May 11, 21:10 UTCMay 12, 05:45 UTC8h 35m
2026-05-09 CHH752 DUB → PEK May 9, 12:05 UTCMay 9, 15:05 UTC3h 0m
2026-05-08 CHH751 PEK → DUB May 8, 19:05 UTCMay 9, 05:55 UTC10h 50m
2026-05-08 CHH7279 PEK → SYX May 8, 05:39 UTCMay 8, 05:54 UTC15m
2026-05-07 CHH752 DUB → PEK May 7, 20:10 UTCMay 7, 20:30 UTC20m
2026-05-07 CHH752 DUB → PEK May 7, 11:20 UTCMay 7, 17:45 UTC6h 25m
2026-05-06 CHH751 PEK → DUB May 6, 19:00 UTCMay 7, 06:05 UTC11h 5m
2026-05-06 CHH7803 PEK → CAN May 6, 01:50 UTCMay 6, 02:15 UTC25m
2026-05-05 CHH754 MAN → PEK May 5, 19:50 UTCMay 5, 20:05 UTC15m
2026-05-05 CHH754 MAN → PEK May 5, 11:20 UTCMay 5, 17:25 UTC6h 5m
2026-05-04 CHH753 PEK → MAN May 4, 19:15 UTCMay 4, 23:20 UTC4h 5m
2026-05-04 CHH7814 CAN → PEK May 4, 14:00 UTCMay 4, 14:10 UTC10m
2026-05-04 CHH7809 PEK → CAN May 4, 06:55 UTCMay 4, 07:10 UTC15m
2026-05-04 CHH7806 CAN → PEK May 4, 04:44 UTCMay 4, 04:55 UTC10m
2026-05-03 CHH7813 PEK → CAN May 3, 11:55 UTCMay 3, 12:15 UTC20m
2026-05-03 CHH7277 PEK → HGH May 3, 00:15 UTCMay 3, 00:30 UTC15m
2026-05-02 CHH7179 PEK → SYX May 2, 01:50 UTCMay 2, 02:15 UTC25m
2026-05-01 CHH408 EDI → PEK May 1, 20:20 UTCMay 1, 20:35 UTC15m
2026-05-01 CHH408 EDI → PEK May 1, 11:20 UTCMay 1, 17:45 UTC6h 25m
2026-04-30 CHH407 PEK → EDI Apr 30, 19:20 UTCMay 1, 05:55 UTC10h 35m
2026-04-30 CHH7714 SZX → PEK Apr 30, 14:10 UTCApr 30, 14:20 UTC10m
2026-04-30 CHH7714 SZX → PEK Apr 30, 11:35 UTCApr 30, 11:45 UTC10m
2026-04-30 CHH7707 PEK → SZX Apr 30, 08:10 UTCApr 30, 08:30 UTC20m
2026-04-30 CHH7707 PEK → SZX Apr 30, 05:50 UTCApr 30, 06:05 UTC15m
2026-04-29 CHH7813 PEK → CAN Apr 29, 11:45 UTCApr 29, 12:05 UTC20m
2026-04-29 CHH7803 PEK → CAN Apr 29, 01:45 UTCApr 29, 01:54 UTC10m
2026-04-28 CHH770 OSL → PEK Apr 28, 11:25 UTCApr 28, 19:45 UTC8h 20m
2026-04-27 CHH769 PEK → OSL Apr 27, 20:05 UTCApr 28, 04:55 UTC8h 50m

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-1020 page for operator, model, and routing details .

Mode-S 7812A4 frequently asked

What is Mode-S code 7812A4?
7812A4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1020.
Where is Mode-S 7812A4 registered?
Mode-S code 7812A4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812A4 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812A4, octal 36011244, decimal 7,869,092.
What flights does 7812A4 operate?
Mode-S 7812A4 has broadcast 20 distinct callsigns, including CHH753, CHH754, CHH408, CHH407, CHH752.