Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781166

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8581 · AIRBUS A-320

Hex
781166
Octal
36010546
Decimal
7,868,774
Country
CN
Tail
B-8581
Type
A320
No current signal · last broadcast 7h ago
Flights observed
91
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 781166.

Country allocation

The ICAO 24-bit address 781166 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
CQH6825 - 5 2026-05-23
CQH6826 - 4 2026-05-23
CQH6539 - 4 2026-06-23
CQH6540 - 3 2026-06-23
CQH6538 Spring Airlines 3 2026-06-09
CQH6190 - 3 2026-07-04
CQH8755 Spring Airlines 2 2026-05-29
CQH8715 Spring Airlines 2 2026-05-06
CQH8602 - 2 2026-07-03
CQH8601 - 2 2026-07-02
CQH8533 - 2 2026-06-20
CQH7502 Spring Airlines 2 2026-04-18
CQH7432 Spring Airlines 2 2026-04-15
CQH7431 Spring Airlines 2 2026-04-15
CQH7008 Spring Airlines 2 2026-06-14
CQH6482 - 2 2026-07-17
CQH6481 - 2 2026-06-17
CQH8951 Spring Airlines 1 2026-05-29
CQH8936 Spring Airlines 1 2026-05-26
CQH8933 Spring Airlines 1 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CQH6482 - Jul 17, 16:55 UTCJul 17, 17:20 UTC25m
2026-07-17 CQH6156 - Jul 17, 05:35 UTCJul 17, 09:55 UTC4h 20m
2026-07-15 CQH6628 - Jul 15, 14:40 UTCJul 15, 15:00 UTC20m
2026-07-15 CQH6627 - Jul 15, 12:40 UTCJul 15, 13:05 UTC25m
2026-07-10 CQH6472 - Jul 10, 14:25 UTCJul 10, 14:35 UTC10m
2026-07-10 CQH8728 - Jul 10, 01:05 UTCJul 10, 04:50 UTC3h 45m
2026-07-07 CQH8810 - Jul 7, 04:55 UTCJul 7, 05:45 UTC50m
2026-07-05 CQH6599 - Jul 5, 12:00 UTCJul 5, 15:45 UTC3h 45m
2026-07-04 CQH6600 - Jul 4, 15:35 UTCJul 5, 15:30 UTC23h 55m
2026-07-04 CQH6190 - Jul 4, 15:15 UTCJul 5, 12:05 UTC20h 50m
2026-07-04 CQH6190 - Jul 4, 06:50 UTCJul 4, 15:45 UTC8h 55m
2026-07-03 CQH8602 - Jul 3, 07:35 UTCJul 4, 06:50 UTC23h 15m
2026-07-03 CQH8602 - Jul 3, 06:30 UTCJul 3, 07:45 UTC1h 15m
2026-07-02 CQH8601 - Jul 2, 09:35 UTCJul 3, 05:15 UTC19h 40m
2026-07-02 CQH8601 - Jul 2, 09:10 UTCJul 3, 05:15 UTC20h 5m
2026-07-01 CQH6537 - Jul 1, 23:35 UTCJul 2, 07:20 UTC7h 45m
2026-07-01 CQH8632 - Jul 1, 10:35 UTCJul 1, 10:45 UTC10m
2026-07-01 CQH8631 - Jul 1, 08:55 UTCJul 1, 09:20 UTC25m
2026-06-27 CQH7387 - Jun 27, 12:55 UTCJun 27, 13:04 UTC10m
2026-06-25 CQH8786 - Jun 25, 08:20 UTCJun 25, 11:30 UTC3h 10m
2026-06-24 CQH8860 - Jun 24, 06:29 UTCJun 25, 03:04 UTC20h 35m
2026-06-23 CQH8671 - Jun 23, 23:24 UTCJun 23, 23:34 UTC10m
2026-06-23 CQH6540 - Jun 23, 16:29 UTCJun 23, 16:44 UTC15m
2026-06-23 CQH6540 - Jun 23, 12:05 UTCJun 23, 12:20 UTC15m
2026-06-23 CQH6539 - Jun 23, 09:14 UTCJun 23, 09:29 UTC15m
2026-06-23 CQH6539 - Jun 23, 04:55 UTCJun 23, 05:09 UTC15m
2026-06-22 CQH6874 - Jun 22, 03:40 UTCJun 22, 17:25 UTC13h 45m
2026-06-20 CQH8533 - Jun 20, 10:15 UTCJun 20, 16:49 UTC6h 35m
2026-06-17 CQH6481 - Jun 17, 22:15 UTCJun 17, 22:25 UTC10m
2026-06-17 CQH6596 TNA → SZX Jun 17, 16:25 UTCJun 17, 16:50 UTC25m
2026-06-16 CQH7302 - Jun 16, 08:25 UTCJun 16, 10:40 UTC2h 15m
2026-06-16 CQH6465 - Jun 16, 05:20 UTCJun 16, 06:54 UTC1h 35m
2026-06-14 CQH7008 PNH → CAN Jun 14, 04:40 UTCJun 14, 17:05 UTC12h 25m
2026-06-14 CQH8875 - Jun 14, 01:45 UTCJun 14, 03:20 UTC1h 35m
2026-06-10 CQH7134 TSN → LHW Jun 10, 12:15 UTCJun 10, 12:25 UTC10m
2026-06-10 CQH7133 LHW → TSN Jun 10, 09:50 UTCJun 10, 10:10 UTC20m
2026-06-09 CQH6538 FUK → PVG Jun 9, 09:05 UTCJun 9, 09:15 UTC10m
2026-06-06 CQH6873 SZX → NGB Jun 6, 08:45 UTCJun 6, 08:55 UTC10m
2026-06-05 CQH8753 SZX → XIY Jun 5, 22:45 UTCJun 5, 23:00 UTC15m
2026-06-05 CQH6540 SJW → SZX Jun 5, 12:35 UTCJun 5, 12:45 UTC10m
2026-06-05 CQH6539 SZX → SJW Jun 5, 09:45 UTCJun 5, 10:00 UTC15m
2026-06-05 CQH6539 SZX → SJW Jun 5, 06:00 UTCJun 5, 06:15 UTC15m
2026-06-05 CQH8614 CKG → SZX Jun 5, 03:20 UTCJun 5, 03:30 UTC10m
2026-06-04 CQH8613 SZX → CKG Jun 4, 22:40 UTCJun 4, 22:55 UTC15m
2026-06-04 CQH6482 DOY → SZX Jun 4, 16:50 UTCJun 4, 17:10 UTC20m
2026-06-04 CQH8661 SJW → CGQ Jun 4, 09:30 UTCJun 4, 09:45 UTC15m
2026-05-31 CQH6538 FUK → PVG May 31, 09:05 UTCMay 31, 09:15 UTC10m
2026-05-29 CQH8756 BKK → PVG May 29, 19:55 UTCMay 29, 22:15 UTC2h 20m
2026-05-29 CQH8755 PVG → BKK May 29, 03:40 UTCMay 29, 17:55 UTC14h 15m
2026-05-29 CQH8951 PVG → TPE May 29, 02:00 UTCMay 29, 02:30 UTC30m

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-8581 page for operator, model, and routing details .

Mode-S 781166 frequently asked

What is Mode-S code 781166?
781166 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8581.
Where is Mode-S 781166 registered?
Mode-S code 781166 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781166 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781166, octal 36010546, decimal 7,868,774.
What flights does 781166 operate?
Mode-S 781166 has broadcast 20 distinct callsigns, including CQH6825, CQH6826, CQH6539, CQH6540, CQH6538.