Apparatus

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sensors Mode-S transponder

7812A2

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1022 · AIRBUS A-330-300

Hex
7812A2
Octal
36011242
Decimal
7,869,090
Country
CN
Tail
B-1022
Type
A333
No current signal · last broadcast 7h ago
Flights observed
101
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 7812A2.

Country allocation

The ICAO 24-bit address 7812A2 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
CHH7937 - 8 2026-06-24
CHH7938 - 7 2026-06-24
CHH7966 Hainan Airlines 6 2026-07-17
CHH754 Hainan Airlines 6 2026-06-12
CHH7986 - 4 2026-07-17
CHH753 Hainan Airlines 4 2026-06-11
CHH7965 - 3 2026-07-16
CHH770 - 3 2026-07-14
CHH769 - 3 2026-07-13
CHH7146 - 3 2026-07-12
CHH7985 - 2 2026-07-17
CHH7815 Hainan Airlines 2 2026-04-30
CHH7813 - 2 2026-07-12
CHH7601 Hainan Airlines 2 2026-05-29
CHH7335 - 2 2026-06-30
CHH7279 Hainan Airlines 2 2026-04-28
CHH7182 Hainan Airlines 2 2026-05-06
CHH7145 - 2 2026-06-24
CHH7052 Hainan Airlines 2 2026-05-04
CHH6224 Hainan Airlines 2 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CHH7986 - Jul 17, 23:55 UTCJul 18, 00:15 UTC20m
2026-07-17 CHH7986 - Jul 17, 10:25 UTCJul 17, 21:20 UTC10h 55m
2026-07-17 CHH7985 - Jul 17, 06:54 UTCJul 17, 07:05 UTC10m
2026-07-17 CHH7966 LED → PEK Jul 17, 00:04 UTCJul 17, 00:25 UTC20m
2026-07-16 CHH7965 - Jul 16, 06:55 UTCJul 16, 21:35 UTC14h 40m
2026-07-16 CHH7966 - Jul 16, 00:05 UTCJul 16, 00:25 UTC20m
2026-07-15 CHH7966 - Jul 15, 18:15 UTCJul 15, 21:40 UTC3h 25m
2026-07-15 CHH7965 - Jul 15, 07:40 UTCJul 15, 14:50 UTC7h 10m
2026-07-15 CHH7198 - Jul 15, 03:55 UTCJul 15, 04:15 UTC20m
2026-07-14 CHH7197 - Jul 14, 23:15 UTCJul 14, 23:40 UTC25m
2026-07-14 CHH770 - Jul 14, 11:40 UTCJul 14, 19:35 UTC7h 55m
2026-07-13 CHH769 - Jul 13, 19:40 UTCJul 13, 20:00 UTC20m
2026-07-13 CHH7712 - Jul 13, 10:30 UTCJul 13, 10:45 UTC15m
2026-07-13 CHH7707 - Jul 13, 05:45 UTCJul 13, 06:10 UTC25m
2026-07-12 CHH7813 - Jul 12, 11:45 UTCJul 12, 12:10 UTC25m
2026-07-12 CHH7146 - Jul 12, 09:25 UTCJul 12, 09:45 UTC20m
2026-07-04 CHH6220 - Jul 4, 15:25 UTCJul 4, 15:45 UTC20m
2026-07-03 CHH7567 - Jul 3, 11:15 UTCJul 3, 11:30 UTC15m
2026-07-03 CHH7568 - Jul 3, 09:10 UTCJul 3, 09:30 UTC20m
2026-07-02 CHH6224 PEK → URC Jul 2, 13:35 UTCJul 2, 13:55 UTC20m
2026-07-02 CHH7146 - Jul 2, 09:40 UTCJul 2, 10:00 UTC20m
2026-06-30 CHH7177 PEK → HGH Jun 30, 16:40 UTCJun 30, 16:55 UTC15m
2026-06-30 CHH7335 - Jun 30, 04:15 UTCJun 30, 04:45 UTC30m
2026-06-30 CHH6223 URC → PEK Jun 30, 02:20 UTCJun 30, 02:35 UTC15m
2026-06-28 CHH6224 PEK → URC Jun 28, 13:34 UTCJun 28, 13:59 UTC25m
2026-06-28 CHH7336 - Jun 28, 10:30 UTCJun 28, 10:39 UTC10m
2026-06-28 CHH7335 - Jun 28, 04:55 UTCJun 28, 05:15 UTC20m
2026-06-28 CHH6223 URC → PEK Jun 28, 02:20 UTCJun 28, 02:39 UTC20m
2026-06-24 CHH7145 - Jun 24, 23:54 UTCJun 25, 00:14 UTC20m
2026-06-24 CHH7938 - Jun 24, 21:09 UTCJun 24, 21:24 UTC15m
2026-06-24 CHH7938 - Jun 24, 12:25 UTCJun 24, 18:39 UTC6h 15m
2026-06-24 CHH7937 - Jun 24, 04:15 UTCJun 24, 04:24 UTC10m
2026-06-23 CHH7937 - Jun 23, 19:10 UTCJun 23, 23:19 UTC4h 10m
2026-06-23 CHH7246 - Jun 23, 14:49 UTCJun 23, 15:09 UTC20m
2026-06-23 CHH7245 PEK → URC Jun 23, 06:19 UTCJun 23, 06:44 UTC25m
2026-06-23 CHH7986 - Jun 23, 00:24 UTCJun 23, 00:45 UTC20m
2026-06-22 CHH7986 - Jun 22, 21:05 UTCJun 22, 21:54 UTC50m
2026-06-22 CHH7985 - Jun 22, 06:49 UTCJun 22, 10:34 UTC3h 45m
2026-06-21 CHH7966 - Jun 21, 23:59 UTCJun 22, 00:20 UTC20m
2026-06-21 CHH7966 - Jun 21, 20:45 UTCJun 21, 21:34 UTC50m
2026-06-21 CHH7966 - Jun 21, 17:20 UTCJun 21, 17:45 UTC25m
2026-06-21 CHH7965 - Jun 21, 07:29 UTCJun 21, 14:30 UTC7h 0m
2026-06-20 CHH770 - Jun 20, 11:34 UTCJun 20, 19:29 UTC7h 55m
2026-06-19 CHH769 - Jun 19, 19:45 UTCJun 20, 04:29 UTC8h 45m
2026-06-15 CHH7813 PEK → CAN Jun 15, 14:24 UTCJun 15, 14:34 UTC10m
2026-06-13 CHH7477 PEK → HGH Jun 13, 04:25 UTCJun 13, 04:35 UTC10m
2026-06-12 CHH754 MAN → PEK Jun 12, 20:40 UTCJun 12, 21:00 UTC20m
2026-06-12 CHH754 MAN → PEK Jun 12, 11:20 UTCJun 12, 18:10 UTC6h 50m
2026-06-11 CHH753 PEK → MAN Jun 11, 19:30 UTCJun 12, 05:35 UTC10h 6m
2026-06-05 CHH7938 LAX → PEK Jun 5, 12:10 UTCJun 5, 18:15 UTC6h 5m

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-1022 page for operator, model, and routing details .

Mode-S 7812A2 frequently asked

What is Mode-S code 7812A2?
7812A2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1022.
Where is Mode-S 7812A2 registered?
Mode-S code 7812A2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812A2 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812A2, octal 36011242, decimal 7,869,090.
What flights does 7812A2 operate?
Mode-S 7812A2 has broadcast 20 distinct callsigns, including CHH7937, CHH7938, CHH7966, CHH754, CHH7986.