Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781D7A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-328X · AIRBUS A-321neo

Hex
781D7A
Octal
36016572
Decimal
7,871,866
Country
CN
Tail
B-328X
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
55
Distinct callsigns
16
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781D7A.

Country allocation

The ICAO 24-bit address 781D7A 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 16 distinct

Callsign Airline Flights Last seen
CDC8966 Zhejiang Loong Airlines 8 2026-05-27
CDC8965 Zhejiang Loong Airlines 8 2026-05-27
CDC8888 Zhejiang Loong Airlines 8 2026-05-07
CDC8899 Zhejiang Loong Airlines 5 2026-06-03
CDC8627 Zhejiang Loong Airlines 5 2026-06-02
CDC8900 Zhejiang Loong Airlines 4 2026-05-29
CDC8628 Zhejiang Loong Airlines 4 2026-06-02
CDC8988 Zhejiang Loong Airlines 3 2026-05-07
CDC8995 Zhejiang Loong Airlines 2 2026-04-25
CDC8199 Zhejiang Loong Airlines 2 2026-06-02
CDC8996 Zhejiang Loong Airlines 1 2026-05-26
CDC8989 - 1 2026-04-16
CDC8788 - 1 2026-04-18
CDC873R - 1 2026-05-21
CDC8738 Zhejiang Loong Airlines 1 2026-04-18
CDC8200 Zhejiang Loong Airlines 1 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 CDC8899 SZX → HGH Jun 3, 01:50 UTCJun 3, 02:05 UTC15m
2026-06-02 CDC8627 HGH → SZX Jun 2, 23:10 UTCJun 3, 00:05 UTC55m
2026-06-02 CDC8628 SZX → HGH Jun 2, 16:10 UTCJun 2, 16:20 UTC10m
2026-06-02 CDC8199 HGH → SYX Jun 2, 06:15 UTCJun 2, 15:00 UTC8h 45m
2026-06-02 CDC8899 SZX → HGH Jun 2, 02:00 UTCJun 2, 02:10 UTC10m
2026-06-01 CDC8627 HGH → SZX Jun 1, 23:20 UTCJun 2, 00:15 UTC55m
2026-05-29 CDC8628 SZX → HGH May 29, 18:55 UTCMay 29, 19:05 UTC10m
2026-05-29 CDC8900 HGH → SZX May 29, 06:20 UTCMay 29, 17:30 UTC11h 10m
2026-05-29 CDC8899 SZX → HGH May 29, 01:35 UTCMay 29, 01:45 UTC10m
2026-05-28 CDC8627 HGH → SZX May 28, 23:00 UTCMay 28, 23:55 UTC55m
2026-05-27 CDC8966 SZX → HGH May 27, 06:04 UTCMay 27, 06:15 UTC10m
2026-05-27 CDC8965 HGH → SZX May 27, 04:14 UTCMay 27, 04:34 UTC20m
2026-05-26 CDC8996 CAN → HGH May 26, 16:00 UTCMay 26, 16:10 UTC10m
2026-05-25 CDC8966 SZX → HGH May 25, 07:45 UTCMay 25, 07:55 UTC10m
2026-05-25 CDC8965 HGH → SZX May 25, 05:30 UTCMay 25, 06:15 UTC45m
2026-05-24 CDC8966 SZX → HGH May 24, 08:10 UTCMay 24, 08:20 UTC10m
2026-05-24 CDC8965 HGH → SZX May 24, 05:00 UTCMay 24, 05:25 UTC25m
2026-05-22 CDC8966 SZX → HGH May 22, 06:45 UTCMay 22, 07:00 UTC15m
2026-05-22 CDC8965 HGH → SZX May 22, 05:00 UTCMay 22, 05:20 UTC20m
2026-05-21 CDC8628 SZX → HGH May 21, 20:25 UTCMay 21, 20:40 UTC15m
2026-05-21 CDC8900 HGH → SZX May 21, 07:15 UTCMay 21, 19:10 UTC11h 55m
2026-05-21 CDC873R - May 21, 01:55 UTCMay 21, 02:10 UTC15m
2026-05-20 CDC8900 HGH → SZX May 20, 23:30 UTCMay 20, 23:50 UTC20m
2026-05-20 CDC8199 HGH → SYX May 20, 06:15 UTCMay 20, 06:30 UTC15m
2026-05-20 CDC8899 SZX → HGH May 20, 01:55 UTCMay 20, 02:10 UTC15m
2026-05-19 CDC8627 HGH → SZX May 19, 23:40 UTCMay 20, 00:00 UTC20m
2026-05-19 CDC8628 SZX → HGH May 19, 17:10 UTCMay 19, 17:30 UTC20m
2026-05-19 CDC8900 HGH → SZX May 19, 15:05 UTCMay 19, 15:30 UTC25m
2026-05-19 CDC8200 SYX → HGH May 19, 06:20 UTCMay 19, 14:30 UTC8h 10m
2026-05-19 CDC8899 SZX → HGH May 19, 01:45 UTCMay 19, 02:00 UTC15m
2026-05-18 CDC8627 HGH → SZX May 18, 23:40 UTCMay 19, 00:05 UTC25m
2026-05-08 CDC8966 SZX → HGH May 8, 06:25 UTCMay 8, 06:35 UTC10m
2026-05-08 CDC8965 HGH → SZX May 8, 03:35 UTCMay 8, 04:44 UTC1h 10m
2026-05-07 CDC8988 PEK → HGH May 7, 11:40 UTCMay 7, 11:50 UTC10m
2026-05-07 CDC8888 PEK → HGH May 7, 03:00 UTCMay 7, 03:15 UTC15m
2026-05-06 CDC8988 PEK → HGH May 6, 12:05 UTCMay 6, 12:20 UTC15m
2026-05-06 CDC8888 PEK → HGH May 6, 02:55 UTCMay 6, 03:05 UTC9m
2026-05-05 CDC8888 PEK → HGH May 5, 03:00 UTCMay 5, 03:10 UTC10m
2026-05-04 CDC8965 HGH → SZX May 4, 04:24 UTCMay 4, 04:34 UTC10m
2026-05-03 CDC8988 PEK → HGH May 3, 11:50 UTCMay 3, 12:00 UTC10m
2026-05-01 CDC8888 PEK → HGH May 1, 03:05 UTCMay 1, 03:15 UTC10m
2026-04-30 CDC8888 PEK → HGH Apr 30, 03:00 UTCApr 30, 03:10 UTC10m
2026-04-29 CDC8965 HGH → SZX Apr 29, 04:44 UTCApr 29, 04:55 UTC10m
2026-04-28 CDC8888 PEK → HGH Apr 28, 03:00 UTCApr 28, 03:15 UTC15m
2026-04-27 CDC8966 SZX → HGH Apr 27, 07:20 UTCApr 27, 08:15 UTC55m
2026-04-27 CDC8965 HGH → SZX Apr 27, 04:30 UTCApr 27, 04:50 UTC20m
2026-04-26 CDC8888 PEK → HGH Apr 26, 03:05 UTCApr 26, 03:15 UTC10m
2026-04-25 CDC8995 HGH → CAN Apr 25, 13:25 UTCApr 25, 13:35 UTC10m
2026-04-23 CDC8995 HGH → CAN Apr 23, 13:05 UTCApr 23, 13:25 UTC20m
2026-04-19 CDC8888 PEK → HGH Apr 19, 03:10 UTCApr 19, 03:20 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-328X page for operator, model, and routing details .

Mode-S 781D7A frequently asked

What is Mode-S code 781D7A?
781D7A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-328X.
Where is Mode-S 781D7A registered?
Mode-S code 781D7A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781D7A broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781D7A, octal 36016572, decimal 7,871,866.
What flights does 781D7A operate?
Mode-S 781D7A has broadcast 16 distinct callsigns, including CDC8966, CDC8965, CDC8888, CDC8899, CDC8627.