Apparatus

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sensors Mode-S transponder

781855

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30D3 · AIRBUS A-320neo

Hex
781855
Octal
36014125
Decimal
7,870,549
Country
CN
Tail
B-30D3
Type
A20N
No current signal · last broadcast Jul 26, 09:30 UTC
Flights observed
112
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 09:30 UTC

Last known position

Most recent position reported by Mode-S 781855.

Country allocation

The ICAO 24-bit address 781855 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
CQH7259 Spring Airlines 6 2026-06-19
CQH6524 - 5 2026-07-14
CQH8598 - 4 2026-07-21
CQH8597 Spring Airlines 4 2026-07-21
CQH8511 - 4 2026-06-30
CQH7050 - 4 2026-07-22
CQH6515 - 4 2026-07-13
CQH8934 - 3 2026-06-30
CQH8663 Spring Airlines 3 2026-07-25
CQH6987 - 3 2026-06-24
CQH6523 - 3 2026-07-14
CQH8893 Spring Airlines 2 2026-05-23
CQH8832 - 2 2026-07-09
CQH8779 Spring Airlines 2 2026-05-13
CQH8552 Spring Airlines 2 2026-07-19
CQH7502 - 2 2026-06-14
CQH7501 - 2 2026-06-14
CQH7348 Spring Airlines 2 2026-05-20
CQH7347 Spring Airlines 2 2026-05-20
CQH7282 - 2 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CQH8892 BKK → PVG Jul 26, 06:00 UTCJul 26, 09:30 UTC3h 31m
2026-07-25 CQH8664 HKT → PVG Jul 25, 10:55 UTCJul 26, 04:30 UTC17h 35m
2026-07-25 CQH8663 PVG → HKT Jul 25, 07:50 UTCJul 26, 04:30 UTC20h 40m
2026-07-25 CQH8663 PVG → HKT Jul 25, 06:20 UTCJul 26, 04:30 UTC22h 10m
2026-07-25 CQH8663 PVG → HKT Jul 25, 01:50 UTCJul 25, 12:55 UTC11h 5m
2026-07-23 CQH7058 UBN → PVG Jul 23, 02:20 UTCJul 23, 15:55 UTC13h 35m
2026-07-22 CQH7092 - Jul 22, 13:40 UTCJul 22, 13:55 UTC15m
2026-07-22 CQH7050 - Jul 22, 03:15 UTCJul 22, 03:45 UTC30m
2026-07-21 CQH8598 - Jul 21, 10:05 UTCJul 22, 02:05 UTC16h 0m
2026-07-21 CQH8597 PVG → HKG Jul 21, 05:00 UTCJul 21, 08:35 UTC3h 35m
2026-07-19 CQH8552 SIN → PVG Jul 19, 22:25 UTCJul 20, 02:30 UTC4h 5m
2026-07-19 CQH8665 PVG → HKT Jul 19, 03:55 UTCJul 19, 20:55 UTC17h 0m
2026-07-17 CQH8870 - Jul 17, 17:40 UTCJul 17, 18:15 UTC35m
2026-07-16 CQH7050 - Jul 16, 08:10 UTCJul 16, 08:50 UTC40m
2026-07-16 CQH7049 - Jul 16, 06:20 UTCJul 16, 06:55 UTC35m
2026-07-15 CQH7282 - Jul 15, 14:00 UTCJul 15, 15:05 UTC1h 5m
2026-07-15 CQH7282 - Jul 15, 11:50 UTCJul 15, 12:05 UTC15m
2026-07-15 CQH7281 - Jul 15, 09:55 UTCJul 15, 10:20 UTC25m
2026-07-14 CQH6524 - Jul 14, 14:15 UTCJul 15, 08:25 UTC18h 9m
2026-07-14 CQH6524 - Jul 14, 11:20 UTCJul 15, 08:25 UTC21h 4m
2026-07-14 CQH6524 - Jul 14, 11:00 UTCJul 15, 08:25 UTC21h 24m
2026-07-14 CQH6523 - Jul 14, 09:00 UTCJul 14, 09:20 UTC20m
2026-07-13 CQH6516 - Jul 13, 15:55 UTCJul 14, 05:45 UTC13h 50m
2026-07-13 CQH6515 - Jul 13, 00:30 UTCJul 13, 14:05 UTC13h 35m
2026-07-11 CQH7135 - Jul 11, 00:50 UTCJul 11, 01:10 UTC20m
2026-07-09 CQH8832 - Jul 9, 23:45 UTCJul 10, 03:15 UTC3h 30m
2026-07-07 CQH8598 - Jul 7, 08:50 UTCJul 7, 13:15 UTC4h 25m
2026-07-07 CQH8597 - Jul 7, 03:45 UTCJul 7, 06:55 UTC3h 10m
2026-07-06 CQH8952 - Jul 6, 03:50 UTCJul 6, 04:45 UTC55m
2026-07-05 CQH8598 - Jul 5, 10:05 UTCJul 6, 01:45 UTC15h 40m
2026-07-04 CQH8597 - Jul 4, 17:55 UTCJul 5, 08:30 UTC14h 35m
2026-07-04 CQH6515 - Jul 4, 02:00 UTCJul 4, 16:20 UTC14h 20m
2026-07-03 CQH7419 - Jul 3, 23:05 UTCJul 4, 00:30 UTC1h 25m
2026-06-30 CQH8934 - Jun 30, 18:00 UTCJun 30, 19:25 UTC1h 25m
2026-06-30 CQH8511 - Jun 30, 15:30 UTCJun 30, 17:00 UTC1h 30m
2026-06-26 CQH7387 - Jun 26, 11:09 UTCJun 26, 14:15 UTC3h 5m
2026-06-24 CQH6988 - Jun 24, 07:34 UTCJun 24, 09:09 UTC1h 35m
2026-06-24 CQH6987 - Jun 24, 04:44 UTCJun 24, 06:10 UTC1h 25m
2026-06-23 CQH6987 - Jun 23, 09:59 UTCJun 24, 06:10 UTC20h 10m
2026-06-22 CQH6411 - Jun 22, 15:20 UTCJun 23, 10:15 UTC18h 55m
2026-06-22 CQH6411 - Jun 22, 15:10 UTCJun 23, 10:15 UTC19h 5m
2026-06-19 CQH7260 PEN → PVG Jun 19, 07:34 UTCJun 19, 07:45 UTC10m
2026-06-19 CQH7259 PVG → PEN Jun 19, 05:19 UTCJun 19, 05:30 UTC10m
2026-06-19 CQH7259 PVG → PEN Jun 19, 01:39 UTCJun 19, 02:14 UTC35m
2026-06-18 CQH7259 PVG → PEN Jun 18, 03:20 UTCJun 19, 02:14 UTC22h 54m
2026-06-18 CQH7636 - Jun 18, 03:00 UTCJun 18, 03:25 UTC25m
2026-06-16 CQH6294 - Jun 16, 20:00 UTCJun 16, 20:55 UTC55m
2026-06-16 CQH6293 - Jun 16, 17:00 UTCJun 16, 17:30 UTC30m
2026-06-15 CQH6294 - Jun 15, 20:04 UTCJun 16, 17:30 UTC21h 25m
2026-06-15 CQH6293 - Jun 15, 16:49 UTCJun 15, 17:15 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-30D3 page for operator, model, and routing details .

Mode-S 781855 frequently asked

What is Mode-S code 781855?
781855 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30D3.
Where is Mode-S 781855 registered?
Mode-S code 781855 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781855 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 09:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781855, octal 36014125, decimal 7,870,549.
What flights does 781855 operate?
Mode-S 781855 has broadcast 20 distinct callsigns, including CQH7259, CQH6524, CQH8598, CQH8597, CQH8511.