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 Jul 26, 21:10 UTC
Flights observed
187
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 21:10 UTC

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
CCA821 Air China 13 2026-07-21
CCA871 - 12 2026-07-12
CCA872 - 10 2026-07-12
CCA782 Air China 10 2026-07-24
CCA902 Air China 7 2026-07-20
CCA792 Air China 7 2026-07-20
CCA781 Air China 7 2026-07-23
CCA901 Air China 6 2026-07-20
CCA800 - 6 2026-07-10
CCA799 - 5 2026-07-10
CCA702 Air China 5 2026-07-26
CCA701 Air China 5 2026-07-26
CCA1242 Air China 5 2026-07-24
CCA822 Air China 4 2026-07-22
CCA1491 Air China 4 2026-07-25
CCA1335 Air China 4 2026-06-10
CCA979 - 3 2026-07-09
CCA1933 - 3 2026-06-29
CCA1545 - 3 2026-07-05
CCA1256 - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA702 DAC → PEK Jul 26, 16:40 UTCJul 26, 21:10 UTC4h 30m
2026-07-26 CCA701 PEK → DAC Jul 26, 10:30 UTCJul 26, 15:05 UTC4h 35m
2026-07-26 CCA1400 CSX → PEK Jul 26, 08:10 UTCJul 26, 08:20 UTC10m
2026-07-25 CCA778 - Jul 25, 22:20 UTCJul 25, 22:35 UTC15m
2026-07-25 CCA777 - Jul 25, 09:55 UTCJul 25, 10:10 UTC15m
2026-07-25 CCA1492 WMT → PEK Jul 25, 07:25 UTCJul 25, 07:35 UTC10m
2026-07-25 CCA1491 PEK → WMT Jul 25, 00:30 UTCJul 25, 01:00 UTC30m
2026-07-24 CCA1242 AAT → PEK Jul 24, 15:35 UTCJul 24, 15:55 UTC20m
2026-07-24 CCA782 TBS → URC Jul 24, 05:30 UTCJul 24, 05:45 UTC15m
2026-07-23 CCA782 - Jul 23, 18:55 UTCJul 23, 19:25 UTC30m
2026-07-23 CCA781 URC → TBS Jul 23, 06:50 UTCJul 23, 16:55 UTC10h 5m
2026-07-22 CCA1609 PEK → CGQ Jul 22, 23:35 UTCJul 22, 23:45 UTC10m
2026-07-22 CCA822 HKT → PEK Jul 22, 10:20 UTCJul 22, 15:25 UTC5h 5m
2026-07-21 CCA821 PEK → HKT Jul 21, 06:00 UTCJul 21, 15:25 UTC9h 25m
2026-07-20 CCA792 NQZ → XIY Jul 20, 09:35 UTCJul 21, 04:05 UTC18h 29m
2026-07-20 CCA902 UBN → PEK Jul 20, 05:15 UTCJul 20, 05:30 UTC15m
2026-07-20 CCA901 PEK → UBN Jul 20, 01:10 UTCJul 20, 01:20 UTC10m
2026-07-18 CCA1243 - Jul 18, 23:00 UTCJul 18, 23:25 UTC25m
2026-07-18 CCA822 HKT → PEK Jul 18, 13:00 UTCJul 18, 15:05 UTC2h 5m
2026-07-18 CCA821 PEK → HKT Jul 18, 05:55 UTCJul 18, 10:35 UTC4h 40m
2026-07-18 CCA792 NQZ → XIY Jul 18, 02:55 UTCJul 18, 03:15 UTC20m
2026-07-17 CCA791 XIY → NQZ Jul 17, 07:55 UTCJul 17, 08:10 UTC15m
2026-07-17 CCA902 - Jul 17, 05:15 UTCJul 17, 05:30 UTC15m
2026-07-16 CCA821 - Jul 16, 05:20 UTCJul 16, 15:00 UTC9h 40m
2026-07-15 CCA792 - Jul 15, 15:20 UTCJul 16, 03:20 UTC12h 0m
2026-07-15 CCA792 - Jul 15, 08:20 UTCJul 16, 03:20 UTC19h 0m
2026-07-15 CCA902 - Jul 15, 05:45 UTCJul 15, 06:05 UTC20m
2026-07-15 CCA901 - Jul 15, 01:30 UTCJul 15, 01:45 UTC15m
2026-07-14 CCA1256 - Jul 14, 17:00 UTCJul 14, 17:20 UTC20m
2026-07-14 CCA1255 - Jul 14, 08:05 UTCJul 14, 08:15 UTC10m
2026-07-14 CCA108 - Jul 14, 03:30 UTCJul 14, 03:45 UTC15m
2026-07-13 CCA107 - Jul 13, 13:45 UTCJul 13, 14:10 UTC25m
2026-07-13 CCA107 - Jul 13, 11:15 UTCJul 13, 11:35 UTC20m
2026-07-13 CCA1491 - Jul 13, 00:30 UTCJul 13, 00:55 UTC25m
2026-07-12 CCA872 - Jul 12, 16:40 UTCJul 12, 20:20 UTC3h 40m
2026-07-12 CCA871 - Jul 12, 08:50 UTCJul 12, 14:30 UTC5h 40m
2026-07-12 CCA1627 - Jul 12, 02:40 UTCJul 12, 02:50 UTC10m
2026-07-11 CCA1250 - Jul 11, 18:25 UTCJul 11, 18:45 UTC20m
2026-07-11 CCA1249 - Jul 11, 07:05 UTCJul 11, 07:25 UTC20m
2026-07-10 CCA800 - Jul 10, 23:05 UTCJul 10, 23:25 UTC20m
2026-07-10 CCA799 - Jul 10, 12:25 UTCJul 10, 12:55 UTC30m
2026-07-10 CCA1208 - Jul 10, 09:35 UTCJul 10, 09:55 UTC20m
2026-07-10 CCA1207 - Jul 10, 04:55 UTCJul 10, 05:20 UTC25m
2026-07-09 CCA980 - Jul 9, 18:40 UTCJul 9, 20:05 UTC1h 25m
2026-07-09 CCA979 - Jul 9, 16:25 UTCJul 9, 16:45 UTC20m
2026-07-09 CCA979 - Jul 9, 12:30 UTCJul 9, 15:25 UTC2h 55m
2026-07-09 CCA1272 - Jul 9, 09:00 UTCJul 9, 09:20 UTC20m
2026-07-09 CCA1271 - Jul 9, 04:00 UTCJul 9, 04:30 UTC30m
2026-07-08 CCA1258 - Jul 8, 09:20 UTCJul 8, 09:40 UTC20m
2026-07-08 CCA1257 - Jul 8, 00:40 UTCJul 8, 00:55 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 Jul 26, 21:10 UTC.
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 CCA821, CCA871, CCA872, CCA782, CCA902.