Apparatus

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sensors Mode-S transponder

781EC8

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32D6 · AIRBUS A-320neo

Hex
781EC8
Octal
36017310
Decimal
7,872,200
Country
CN
Tail
B-32D6
Type
A20N
No current signal · last broadcast Jul 23, 12:35 UTC
Flights observed
133
Distinct callsigns
20
Country
CN
Last broadcast
Jul 23, 12:35 UTC

Last known position

Most recent position reported by Mode-S 781EC8.

Country allocation

The ICAO 24-bit address 781EC8 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
CQH6879 Spring Airlines 11 2026-06-05
CQH6880 Spring Airlines 8 2026-06-05
CQH8664 Spring Airlines 6 2026-07-21
CQH8666 Spring Airlines 4 2026-07-21
CQH8665 - 4 2026-07-04
CQH8597 - 4 2026-06-30
CQH8521 - 4 2026-07-11
CQH6523 - 4 2026-07-04
CQH8663 - 3 2026-07-16
CQH8598 - 3 2026-06-30
CQH7502 Spring Airlines 3 2026-06-07
CQH7057 - 3 2026-06-25
CQH8933 Spring Airlines 2 2026-07-17
CQH8878 - 2 2026-07-15
CQH8877 Spring Airlines 2 2026-04-15
CQH8779 - 2 2026-07-17
CQH8756 Spring Airlines 2 2026-04-15
CQH8715 - 2 2026-07-10
CQH8662 Spring Airlines 2 2026-04-25
CQH8593 - 2 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 CQH7282 BKK → PVG Jul 23, 12:05 UTCJul 23, 12:35 UTC30m
2026-07-22 CQH8552 SIN → PVG Jul 22, 22:45 UTCJul 23, 10:15 UTC11h 30m
2026-07-22 CQH8551 PVG → SIN Jul 22, 04:00 UTCJul 22, 21:30 UTC17h 30m
2026-07-21 CQH8666 HKT → PVG Jul 21, 14:05 UTCJul 22, 13:20 UTC23h 15m
2026-07-21 CQH8664 HKT → PVG Jul 21, 10:40 UTCJul 22, 04:15 UTC17h 35m
2026-07-21 CQH8664 HKT → PVG Jul 21, 08:05 UTCJul 22, 04:15 UTC20h 10m
2026-07-21 CQH8664 HKT → PVG Jul 21, 06:05 UTCJul 22, 04:15 UTC22h 10m
2026-07-18 CQH8512 - Jul 18, 01:50 UTCJul 18, 03:05 UTC1h 16m
2026-07-17 CQH8933 CAN → CNX Jul 17, 23:20 UTCJul 18, 00:39 UTC1h 20m
2026-07-17 CQH7420 BKK → CAN Jul 17, 14:50 UTCJul 17, 15:00 UTC10m
2026-07-17 CQH8779 - Jul 17, 01:20 UTCJul 17, 11:10 UTC9h 50m
2026-07-16 CQH8779 - Jul 16, 13:20 UTCJul 17, 11:10 UTC21h 50m
2026-07-16 CQH8664 - Jul 16, 10:45 UTCJul 17, 05:20 UTC18h 35m
2026-07-16 CQH8664 - Jul 16, 08:15 UTCJul 17, 05:20 UTC21h 5m
2026-07-16 CQH8663 - Jul 16, 06:20 UTCJul 17, 05:20 UTC23h 0m
2026-07-15 CQH8878 - Jul 15, 10:15 UTCJul 16, 08:50 UTC22h 35m
2026-07-15 CQH8512 - Jul 15, 01:45 UTCJul 15, 09:10 UTC7h 25m
2026-07-14 CQH8933 - Jul 14, 23:20 UTCJul 15, 00:40 UTC1h 20m
2026-07-13 CQH7420 - Jul 13, 15:15 UTCJul 13, 15:30 UTC15m
2026-07-13 CQH7285 - Jul 13, 12:25 UTCJul 13, 12:45 UTC20m
2026-07-13 CQH8876 - Jul 13, 03:55 UTCJul 13, 10:50 UTC6h 55m
2026-07-12 CQH8875 - Jul 12, 10:05 UTCJul 13, 02:25 UTC16h 20m
2026-07-11 CQH8521 - Jul 11, 14:10 UTCJul 12, 12:20 UTC22h 10m
2026-07-11 CQH8521 - Jul 11, 12:05 UTCJul 12, 10:15 UTC22h 10m
2026-07-11 CQH8716 - Jul 11, 05:25 UTCJul 11, 14:45 UTC9h 20m
2026-07-10 CQH8715 - Jul 10, 13:30 UTCJul 11, 03:25 UTC13h 56m
2026-07-10 CQH8715 - Jul 10, 06:45 UTCJul 11, 03:25 UTC20h 40m
2026-07-10 CQH8521 - Jul 10, 02:05 UTCJul 10, 18:45 UTC16h 40m
2026-07-09 CQH6900 - Jul 9, 13:25 UTCJul 10, 06:55 UTC17h 30m
2026-07-09 CQH6899 - Jul 9, 11:55 UTCJul 9, 12:25 UTC30m
2026-07-09 CQH7050 - Jul 9, 07:30 UTCJul 9, 08:10 UTC40m
2026-07-09 CQH7049 - Jul 9, 05:55 UTCJul 9, 06:25 UTC30m
2026-07-08 CQH8594 - Jul 8, 18:35 UTCJul 8, 21:05 UTC2h 30m
2026-07-08 CQH8593 - Jul 8, 06:15 UTCJul 8, 17:25 UTC11h 10m
2026-07-07 CQH8664 - Jul 7, 12:05 UTCJul 8, 04:40 UTC16h 35m
2026-07-07 CQH8663 - Jul 7, 08:25 UTCJul 8, 04:40 UTC20h 15m
2026-07-07 CQH8663 - Jul 7, 06:40 UTCJul 8, 04:40 UTC22h 0m
2026-07-05 CQH6524 - Jul 5, 10:45 UTCJul 5, 15:00 UTC4h 15m
2026-07-04 CQH6523 - Jul 4, 19:35 UTCJul 5, 09:05 UTC13h 30m
2026-07-04 CQH8665 - Jul 4, 01:50 UTCJul 4, 18:20 UTC16h 30m
2026-07-03 CQH8665 - Jul 3, 12:50 UTCJul 4, 08:05 UTC19h 15m
2026-07-03 CQH8666 - Jul 3, 10:05 UTCJul 4, 08:05 UTC22h 0m
2026-07-03 CQH8666 - Jul 3, 09:20 UTCJul 4, 08:00 UTC22h 40m
2026-07-03 CQH8665 - Jul 3, 06:05 UTCJul 4, 05:00 UTC22h 55m
2026-07-03 CQH8665 - Jul 3, 04:05 UTCJul 4, 02:15 UTC22h 10m
2026-07-02 CQH8666 - Jul 2, 19:40 UTCJul 3, 12:55 UTC17h 15m
2026-07-02 CQH8593 - Jul 2, 15:15 UTCJul 2, 18:25 UTC3h 10m
2026-06-30 CQH8598 - Jun 30, 09:35 UTCJun 30, 13:45 UTC4h 10m
2026-06-30 CQH8597 - Jun 30, 04:45 UTCJun 30, 08:15 UTC3h 30m
2026-06-29 CQH8952 - Jun 29, 03:25 UTCJun 29, 03:49 UTC25m

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-32D6 page for operator, model, and routing details .

Mode-S 781EC8 frequently asked

What is Mode-S code 781EC8?
781EC8 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32D6.
Where is Mode-S 781EC8 registered?
Mode-S code 781EC8 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781EC8 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 12:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781EC8, octal 36017310, decimal 7,872,200.
What flights does 781EC8 operate?
Mode-S 781EC8 has broadcast 20 distinct callsigns, including CQH6879, CQH6880, CQH8664, CQH8666, CQH8665.