Apparatus

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sensors Mode-S transponder

781CB8

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-327C · AIRBUS A-321neo

Hex
781CB8
Octal
36016270
Decimal
7,871,672
Country
CN
Tail
B-327C
Type
A21N
No current signal · last broadcast 5h ago
Flights observed
185
Distinct callsigns
17
Country
CN
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 781CB8.

Country allocation

The ICAO 24-bit address 781CB8 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 17 distinct

Callsign Airline Flights Last seen
CDC8231 Zhejiang Loong Airlines 64 2026-07-05
CDC8232 - 17 2026-07-03
CDC8199 - 13 2026-07-14
CDC8965 - 11 2026-07-02
CDC8899 - 11 2026-07-14
CDC8627 - 11 2026-07-13
CDC8628 - 10 2026-07-13
CDC8966 - 9 2026-07-02
CDC8888 - 8 2026-07-10
CDC8995 Zhejiang Loong Airlines 6 2026-06-21
CDC8988 - 6 2026-07-10
CDC8200 - 6 2026-06-29
CDC8900 - 5 2026-07-12
CDC8629 - 3 2026-06-18
CDC8630 - 2 2026-06-18
CDC862Q - 1 2026-07-08
CDC8206 - 1 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CDC8199 - Jul 14, 05:40 UTCJul 14, 06:40 UTC1h 0m
2026-07-14 CDC8899 - Jul 14, 01:15 UTCJul 14, 01:25 UTC10m
2026-07-13 CDC8627 - Jul 13, 23:10 UTCJul 13, 23:50 UTC40m
2026-07-13 CDC8628 - Jul 13, 15:55 UTCJul 13, 16:05 UTC10m
2026-07-13 CDC8199 - Jul 13, 05:40 UTCJul 13, 13:50 UTC8h 10m
2026-07-13 CDC8899 - Jul 13, 01:25 UTCJul 13, 01:35 UTC10m
2026-07-12 CDC8627 - Jul 12, 23:00 UTCJul 12, 23:45 UTC45m
2026-07-12 CDC8628 - Jul 12, 16:20 UTCJul 12, 16:30 UTC10m
2026-07-12 CDC8900 - Jul 12, 13:45 UTCJul 12, 14:25 UTC40m
2026-07-12 CDC8899 - Jul 12, 07:10 UTCJul 12, 07:20 UTC10m
2026-07-11 CDC8199 - Jul 11, 06:10 UTCJul 11, 09:45 UTC3h 35m
2026-07-11 CDC8899 - Jul 11, 01:45 UTCJul 11, 01:55 UTC10m
2026-07-10 CDC8627 - Jul 10, 23:10 UTCJul 10, 23:50 UTC40m
2026-07-10 CDC8988 - Jul 10, 13:30 UTCJul 10, 13:45 UTC15m
2026-07-10 CDC8888 - Jul 10, 03:20 UTCJul 10, 03:35 UTC15m
2026-07-09 CDC8628 - Jul 9, 17:20 UTCJul 9, 17:30 UTC10m
2026-07-09 CDC8900 - Jul 9, 05:55 UTCJul 9, 15:55 UTC10h 0m
2026-07-09 CDC8899 - Jul 9, 01:25 UTCJul 9, 01:35 UTC10m
2026-07-08 CDC8206 - Jul 8, 14:05 UTCJul 8, 23:15 UTC9h 10m
2026-07-08 CDC862Q - Jul 8, 04:25 UTCJul 8, 04:40 UTC15m
2026-07-05 CDC8231 HRB → HGH Jul 5, 23:30 UTCJul 6, 14:30 UTC15h 0m
2026-07-05 CDC8231 HRB → HGH Jul 5, 08:40 UTCJul 6, 04:55 UTC20h 15m
2026-07-05 CDC8231 HRB → HGH Jul 5, 05:05 UTCJul 5, 23:40 UTC18h 35m
2026-07-05 CDC8231 HRB → HGH Jul 5, 00:05 UTCJul 5, 23:40 UTC23h 35m
2026-07-04 CDC8231 HRB → HGH Jul 4, 23:30 UTCJul 5, 08:45 UTC9h 15m
2026-07-04 CDC8231 HRB → HGH Jul 4, 09:15 UTCJul 5, 05:20 UTC20h 5m
2026-07-04 CDC8231 HRB → HGH Jul 4, 05:25 UTCJul 5, 00:10 UTC18h 45m
2026-07-04 CDC8231 HRB → HGH Jul 4, 00:30 UTCJul 4, 23:55 UTC23h 25m
2026-07-03 CDC8231 HRB → HGH Jul 3, 14:45 UTCJul 4, 09:25 UTC18h 40m
2026-07-03 CDC8232 - Jul 3, 08:30 UTCJul 4, 05:35 UTC21h 5m
2026-07-03 CDC8232 - Jul 3, 07:45 UTCJul 4, 05:35 UTC21h 50m
2026-07-03 CDC8232 - Jul 3, 04:55 UTCJul 4, 00:45 UTC19h 50m
2026-07-02 CDC8231 HRB → HGH Jul 2, 23:25 UTCJul 3, 14:45 UTC15h 20m
2026-07-02 CDC8966 - Jul 2, 07:30 UTCJul 2, 07:45 UTC15m
2026-07-02 CDC8965 - Jul 2, 04:15 UTCJul 2, 04:35 UTC20m
2026-07-01 CDC8966 - Jul 1, 06:25 UTCJul 1, 06:40 UTC15m
2026-07-01 CDC8965 - Jul 1, 04:45 UTCJul 1, 05:10 UTC25m
2026-06-30 CDC8965 - Jun 30, 04:00 UTCJun 30, 04:35 UTC35m
2026-06-29 CDC8628 SZX → HGH Jun 29, 17:19 UTCJun 29, 17:34 UTC15m
2026-06-29 CDC8200 - Jun 29, 10:20 UTCJun 29, 15:19 UTC5h 0m
2026-06-29 CDC8199 - Jun 29, 06:40 UTCJun 29, 06:50 UTC10m
2026-06-29 CDC8899 - Jun 29, 01:34 UTCJun 29, 01:44 UTC10m
2026-06-28 CDC8627 HGH → SZX Jun 28, 22:59 UTCJun 28, 23:44 UTC45m
2026-06-28 CDC8628 SZX → HGH Jun 28, 18:14 UTCJun 28, 18:25 UTC10m
2026-06-28 CDC8200 - Jun 28, 09:25 UTCJun 28, 17:00 UTC7h 35m
2026-06-28 CDC8199 - Jun 28, 06:20 UTCJun 28, 07:09 UTC50m
2026-06-28 CDC8899 - Jun 28, 01:25 UTCJun 28, 01:34 UTC10m
2026-06-27 CDC8627 HGH → SZX Jun 27, 23:34 UTCJun 27, 23:55 UTC20m
2026-06-27 CDC8900 HGH → SZX Jun 27, 15:00 UTCJun 27, 15:34 UTC35m
2026-06-27 CDC8200 - Jun 27, 08:44 UTCJun 27, 09:04 UTC20m

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-327C page for operator, model, and routing details .

Mode-S 781CB8 frequently asked

What is Mode-S code 781CB8?
781CB8 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-327C.
Where is Mode-S 781CB8 registered?
Mode-S code 781CB8 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781CB8 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781CB8, octal 36016270, decimal 7,871,672.
What flights does 781CB8 operate?
Mode-S 781CB8 has broadcast 17 distinct callsigns, including CDC8231, CDC8232, CDC8199, CDC8965, CDC8899.