Apparatus

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sensors Mode-S transponder

7812DD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1393 · BOEING 737 MAX 8

Hex
7812DD
Octal
36011335
Decimal
7,869,149
Country
CN
Tail
B-1393
Type
B38M
No current signal · last broadcast 14d ago
Flights observed
74
Distinct callsigns
20
Country
CN
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S 7812DD.

Country allocation

The ICAO 24-bit address 7812DD 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
CCA872 Air China 6 2026-05-15
CCA871 Air China 6 2026-05-15
CCA821 Air China 4 2026-05-17
CCA782 Air China 4 2026-05-03
CCA702 Air China 4 2026-04-23
CCA701 Air China 4 2026-04-23
CCA800 Air China 3 2026-05-18
CCA799 Air China 3 2026-05-18
CCA781 Air China 3 2026-05-02
CCA1335 Air China 3 2026-05-07
CCA822 Air China 2 2026-05-12
CCA552 Air China 2 2026-04-25
CCA551 Air China 2 2026-05-05
CCA1933 Air China 2 2026-05-03
CCA1902 Air China 2 2026-05-09
CCA1901 Air China 2 2026-05-09
CCA1491 Air China 2 2026-04-21
CCA1336 Air China 2 2026-05-08
CCA980 Air China 1 2026-05-13
CCA979 Air China 1 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-19 CCA1258 - May 19, 12:05 UTCMay 19, 12:25 UTC20m
2026-05-19 CCA1257 - May 19, 02:45 UTCMay 19, 02:55 UTC10m
2026-05-18 CCA800 ALA → PEK May 18, 20:50 UTCMay 18, 21:05 UTC15m
2026-05-18 CCA799 PEK → ALA May 18, 09:50 UTCMay 18, 10:00 UTC10m
2026-05-18 CCA1242 AAT → PEK May 18, 07:20 UTCMay 18, 07:40 UTC20m
2026-05-17 CCA821 PEK → HKT May 17, 09:05 UTCMay 17, 13:50 UTC4h 45m
2026-05-15 CCA872 KUL → PEK May 15, 20:15 UTCMay 15, 20:40 UTC25m
2026-05-15 CCA872 KUL → PEK May 15, 17:00 UTCMay 15, 17:15 UTC15m
2026-05-15 CCA871 PEK → KUL May 15, 11:40 UTCMay 15, 15:10 UTC3h 29m
2026-05-13 CCA980 BKK → PEK May 13, 19:05 UTCMay 13, 19:55 UTC50m
2026-05-13 CCA979 PEK → BKK May 13, 16:10 UTCMay 13, 17:15 UTC1h 5m
2026-05-12 CCA822 HKT → PEK May 12, 08:45 UTCMay 12, 14:25 UTC5h 40m
2026-05-10 CCA822 HKT → PEK May 10, 08:35 UTCMay 10, 14:09 UTC5h 35m
2026-05-09 CCA1902 URC → PEK May 9, 10:15 UTCMay 9, 10:35 UTC20m
2026-05-09 CCA1901 PEK → URC May 9, 01:35 UTCMay 9, 01:45 UTC10m
2026-05-08 CCA872 KUL → PEK May 8, 16:30 UTCMay 8, 20:05 UTC3h 35m
2026-05-08 CCA871 PEK → KUL May 8, 08:55 UTCMay 8, 14:45 UTC5h 50m
2026-05-08 CCA1336 NNG → PEK May 8, 06:54 UTCMay 8, 07:04 UTC10m
2026-05-07 CCA1335 PEK → NNG May 7, 23:29 UTCMay 7, 23:55 UTC25m
2026-05-07 CCA1252 URC → PEK May 7, 08:15 UTCMay 7, 08:35 UTC20m
2026-05-07 CCA1251 PEK → URC May 7, 00:15 UTCMay 7, 00:30 UTC15m
2026-05-06 CCA800 ALA → PEK May 6, 21:20 UTCMay 6, 21:35 UTC15m
2026-05-06 CCA799 PEK → ALA May 6, 10:15 UTCMay 6, 10:35 UTC20m
2026-05-06 CCA1389 PEK → CSX May 6, 01:40 UTCMay 6, 02:01 UTC20m
2026-05-05 CCA551 PEK → HKG May 5, 08:30 UTCMay 5, 16:35 UTC8h 5m
2026-05-05 CCA902 UBN → PEK May 5, 05:10 UTCMay 5, 05:30 UTC20m
2026-05-05 CCA901 PEK → UBN May 5, 01:00 UTCMay 5, 01:15 UTC15m
2026-05-04 CCA872 KUL → PEK May 4, 16:55 UTCMay 4, 20:25 UTC3h 31m
2026-05-04 CCA871 PEK → KUL May 4, 09:15 UTCMay 4, 15:10 UTC5h 55m
2026-05-04 CCA1336 NNG → PEK May 4, 06:55 UTCMay 4, 07:05 UTC10m
2026-05-03 CCA1335 PEK → NNG May 3, 23:25 UTCMay 3, 23:45 UTC20m
2026-05-03 CCA1933 PEK → NNG May 3, 07:40 UTCMay 3, 08:00 UTC20m
2026-05-03 CCA782 TBS → URC May 3, 05:25 UTCMay 3, 05:45 UTC20m
2026-05-02 CCA782 TBS → URC May 2, 18:45 UTCMay 2, 19:15 UTC30m
2026-05-02 CCA781 URC → TBS May 2, 05:10 UTCMay 2, 16:45 UTC11h 35m
2026-05-01 CCA821 PEK → HKT May 1, 05:30 UTCMay 1, 13:50 UTC8h 20m
2026-05-01 CCA1545 PEK → YNT May 1, 00:40 UTCMay 1, 00:50 UTC10m
2026-04-30 CCA872 KUL → PEK Apr 30, 16:55 UTCApr 30, 20:30 UTC3h 35m
2026-04-30 CCA871 PEK → KUL Apr 30, 14:45 UTCApr 30, 15:10 UTC25m
2026-04-30 CCA871 PEK → KUL Apr 30, 09:25 UTCApr 30, 11:50 UTC2h 25m
2026-04-29 CCA1335 PEK → NNG Apr 29, 23:25 UTCApr 29, 23:45 UTC20m
2026-04-29 CCA1933 PEK → NNG Apr 29, 07:35 UTCApr 29, 07:55 UTC20m
2026-04-29 CCA782 TBS → URC Apr 29, 05:30 UTCApr 29, 05:50 UTC20m
2026-04-28 CCA782 TBS → URC Apr 28, 18:45 UTCApr 28, 19:15 UTC30m
2026-04-28 CCA781 URC → TBS Apr 28, 12:40 UTCApr 28, 17:05 UTC4h 25m
2026-04-28 CCA781 URC → TBS Apr 28, 05:05 UTCApr 28, 05:20 UTC15m
2026-04-27 CCA821 PEK → HKT Apr 27, 05:10 UTCApr 27, 13:55 UTC8h 45m
2026-04-26 CCA1349 PEK → CSX Apr 26, 12:25 UTCApr 26, 12:35 UTC10m
2026-04-26 CCA1902 URC → PEK Apr 26, 09:35 UTCApr 26, 09:50 UTC15m
2026-04-26 CCA1901 PEK → URC Apr 26, 01:35 UTCApr 26, 01:50 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-1393 page for operator, model, and routing details .

Mode-S 7812DD frequently asked

What is Mode-S code 7812DD?
7812DD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1393.
Where is Mode-S 7812DD registered?
Mode-S code 7812DD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812DD broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812DD, octal 36011335, decimal 7,869,149.
What flights does 7812DD operate?
Mode-S 7812DD has broadcast 20 distinct callsigns, including CCA872, CCA871, CCA821, CCA782, CCA702.