Apparatus

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sensors Mode-S transponder

781DD8

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32A3 · AIRBUS A-320neo

Hex
781DD8
Octal
36016730
Decimal
7,871,960
Country
CN
Tail
B-32A3
Type
A20N
No current signal · last broadcast Jul 26, 02:25 UTC
Flights observed
76
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 02:25 UTC

Last known position

Most recent position reported by Mode-S 781DD8.

Country allocation

The ICAO 24-bit address 781DD8 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
CCA4174 Air China 9 2026-07-24
CCA4173 Air China 9 2026-07-23
CCA480 - 8 2026-07-08
CCA479 - 8 2026-07-08
CCA4172 Air China 8 2026-07-23
CCA4171 Air China 7 2026-07-23
CCA428 - 5 2026-07-18
CCA427 - 4 2026-07-18
CCA4061 Air China 4 2026-07-26
CCA425 - 2 2026-07-13
CCA9634 - 1 2026-07-24
CCA4340 Air China 1 2026-06-23
CCA426 - 1 2026-07-02
CCA4164 Air China 1 2026-05-18
CCA2758 Air China 1 2026-05-08
CCA2742 - 1 2026-07-11
CCA2741 - 1 2026-07-07
CCA2739 Air China 1 2026-05-08
CCA2662 Air China 1 2026-06-12
CCA2661 Air China 1 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA4061 KMG → SHE Jul 26, 02:10 UTCJul 26, 02:25 UTC15m
2026-07-25 CCA4061 KMG → SHE Jul 25, 05:30 UTCJul 26, 02:25 UTC20h 55m
2026-07-24 CCA4174 PEK → KMG Jul 24, 14:15 UTCJul 25, 05:35 UTC15h 20m
2026-07-24 CCA9634 - Jul 24, 05:15 UTCJul 24, 12:15 UTC7h 0m
2026-07-23 CCA4171 KMG → PEK Jul 23, 14:10 UTCJul 24, 02:20 UTC12h 10m
2026-07-23 CCA4173 KMG → PEK Jul 23, 12:05 UTCJul 23, 12:30 UTC25m
2026-07-23 CCA4172 PEK → KMG Jul 23, 04:00 UTCJul 23, 04:15 UTC15m
2026-07-22 CCA4174 PEK → KMG Jul 22, 15:20 UTCJul 23, 02:15 UTC10h 55m
2026-07-22 CCA4173 KMG → PEK Jul 22, 13:10 UTCJul 22, 13:30 UTC20m
2026-07-22 CCA4172 PEK → KMG Jul 22, 03:50 UTCJul 22, 04:10 UTC20m
2026-07-21 CCA4174 PEK → KMG Jul 21, 14:35 UTCJul 22, 02:05 UTC11h 30m
2026-07-21 CCA4173 KMG → PEK Jul 21, 12:30 UTCJul 21, 12:50 UTC20m
2026-07-21 CCA4172 PEK → KMG Jul 21, 05:10 UTCJul 21, 05:35 UTC25m
2026-07-21 CCA4171 KMG → PEK Jul 21, 03:15 UTCJul 21, 03:35 UTC20m
2026-07-20 CCA4174 - Jul 20, 18:25 UTCJul 20, 18:40 UTC15m
2026-07-20 CCA4173 KMG → PEK Jul 20, 11:55 UTCJul 20, 12:20 UTC25m
2026-07-20 CCA4172 PEK → KMG Jul 20, 04:00 UTCJul 20, 04:25 UTC25m
2026-07-20 CCA4171 - Jul 20, 01:40 UTCJul 20, 02:15 UTC35m
2026-07-18 CCA428 - Jul 18, 10:00 UTCJul 18, 10:15 UTC15m
2026-07-18 CCA427 - Jul 18, 07:45 UTCJul 18, 08:20 UTC35m
2026-07-13 CCA425 - Jul 13, 11:10 UTCJul 13, 20:50 UTC9h 40m
2026-07-11 CCA2742 - Jul 11, 01:30 UTCJul 11, 05:20 UTC3h 50m
2026-07-08 CCA480 - Jul 8, 18:50 UTCJul 8, 20:30 UTC1h 40m
2026-07-08 CCA479 - Jul 8, 15:25 UTCJul 8, 17:10 UTC1h 45m
2026-07-07 CCA2741 - Jul 7, 01:40 UTCJul 7, 05:35 UTC3h 55m
2026-07-04 CCA4174 - Jul 4, 14:40 UTCJul 4, 15:00 UTC20m
2026-07-04 CCA4173 - Jul 4, 12:30 UTCJul 4, 12:50 UTC20m
2026-07-04 CCA4172 - Jul 4, 03:50 UTCJul 4, 04:10 UTC20m
2026-07-04 CCA4171 - Jul 4, 01:45 UTCJul 4, 02:10 UTC25m
2026-07-03 CCA428 - Jul 3, 10:20 UTCJul 3, 10:35 UTC15m
2026-07-03 CCA427 - Jul 3, 07:20 UTCJul 3, 08:00 UTC40m
2026-07-02 CCA426 - Jul 2, 13:15 UTCJul 2, 20:30 UTC7h 15m
2026-07-02 CCA425 - Jul 2, 11:20 UTCJul 2, 13:10 UTC1h 50m
2026-06-29 CCA480 - Jun 29, 18:55 UTCJun 29, 20:30 UTC1h 35m
2026-06-29 CCA479 - Jun 29, 15:30 UTCJun 29, 17:14 UTC1h 45m
2026-06-28 CCA4174 - Jun 28, 14:30 UTCJun 28, 14:45 UTC15m
2026-06-28 CCA4173 - Jun 28, 11:55 UTCJun 28, 12:15 UTC20m
2026-06-28 CCA4172 - Jun 28, 04:05 UTCJun 28, 04:25 UTC20m
2026-06-28 CCA4171 - Jun 28, 01:29 UTCJun 28, 01:59 UTC30m
2026-06-27 CCA4174 - Jun 27, 14:29 UTCJun 27, 14:49 UTC20m
2026-06-27 CCA4173 - Jun 27, 11:59 UTCJun 27, 12:34 UTC35m
2026-06-27 CCA4172 - Jun 27, 04:09 UTCJun 27, 04:29 UTC20m
2026-06-27 CCA4171 - Jun 27, 01:35 UTCJun 27, 01:59 UTC25m
2026-06-26 CCA4174 - Jun 26, 14:19 UTCJun 26, 14:39 UTC20m
2026-06-26 CCA4173 - Jun 26, 11:55 UTCJun 26, 12:19 UTC25m
2026-06-26 CCA4172 - Jun 26, 03:50 UTCJun 26, 04:10 UTC20m
2026-06-26 CCA4171 - Jun 26, 01:39 UTCJun 26, 02:05 UTC25m
2026-06-23 CCA4340 SZX → CTU Jun 23, 23:34 UTCJun 23, 23:44 UTC10m
2026-06-12 CCA2662 ZHA → TFU Jun 12, 04:10 UTCJun 13, 01:40 UTC21h 30m
2026-06-12 CCA2661 TFU → ZHA Jun 12, 02:05 UTCJun 12, 02:15 UTC10m

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-32A3 page for operator, model, and routing details .

Mode-S 781DD8 frequently asked

What is Mode-S code 781DD8?
781DD8 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32A3.
Where is Mode-S 781DD8 registered?
Mode-S code 781DD8 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781DD8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 02:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781DD8, octal 36016730, decimal 7,871,960.
What flights does 781DD8 operate?
Mode-S 781DD8 has broadcast 20 distinct callsigns, including CCA4174, CCA4173, CCA480, CCA479, CCA4172.