Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781640

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-307E · AIRBUS A-321neo

Hex
781640
Octal
36013100
Decimal
7,870,016
Country
CN
Tail
B-307E
Type
A21N
No current signal · last broadcast 8d ago
Flights observed
100
Distinct callsigns
20
Country
CN
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 781640.

Country allocation

The ICAO 24-bit address 781640 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
CSC3993 Sichuan Airlines 21 2026-07-22
CSC3909 Sichuan Airlines 12 2026-07-24
CSC3994 Sichuan Airlines 9 2026-07-22
CSC3910 Sichuan Airlines 9 2026-07-24
CSC3931 - 7 2026-07-13
CSC3708 - 7 2026-06-22
CSC3707 - 7 2026-06-22
CSC3995 Sichuan Airlines 6 2026-07-23
CSC3996 Sichuan Airlines 4 2026-07-23
CSC8764 Sichuan Airlines 3 2026-05-29
CSC3935 - 2 2026-07-17
CSC3122 Sichuan Airlines 2 2026-05-04
CSC3121 Sichuan Airlines 2 2026-05-04
CSC8893 Sichuan Airlines 1 2026-06-03
CSC8706 Sichuan Airlines 1 2026-05-28
CSC6880 - 1 2026-07-08
CSC6872 Sichuan Airlines 1 2026-06-03
CSC6796 - 1 2026-06-20
CSC6421 Sichuan Airlines 1 2026-07-04
CSC3938 Sichuan Airlines 1 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CSC3927 TFU → VTE Jul 24, 12:05 UTCJul 25, 08:00 UTC19h 55m
2026-07-24 CSC3910 SIN → TFU Jul 24, 10:45 UTCJul 25, 08:00 UTC21h 15m
2026-07-24 CSC3910 SIN → TFU Jul 24, 09:25 UTCJul 25, 08:00 UTC22h 35m
2026-07-24 CSC3909 TFU → SIN Jul 24, 04:10 UTCJul 24, 07:15 UTC3h 5m
2026-07-23 CSC3909 TFU → SIN Jul 23, 10:05 UTCJul 24, 07:15 UTC21h 10m
2026-07-23 CSC3996 KUL → TFU Jul 23, 07:35 UTCJul 24, 05:45 UTC22h 10m
2026-07-23 CSC3995 TFU → KUL Jul 23, 05:50 UTCJul 23, 06:15 UTC25m
2026-07-22 CSC3995 TFU → KUL Jul 22, 17:35 UTCJul 23, 05:00 UTC11h 25m
2026-07-22 CSC3994 KUL → TFU Jul 22, 16:25 UTCJul 22, 16:45 UTC20m
2026-07-22 CSC3993 TFU → KUL Jul 22, 14:25 UTCJul 22, 14:35 UTC10m
2026-07-21 CSC3993 TFU → KUL Jul 21, 18:05 UTCJul 22, 13:30 UTC19h 25m
2026-07-21 CSC3993 TFU → KUL Jul 21, 16:45 UTCJul 22, 13:30 UTC20h 45m
2026-07-21 CSC3993 TFU → KUL Jul 21, 14:25 UTCJul 21, 14:35 UTC10m
2026-07-21 CSC3993 TFU → KUL Jul 21, 11:55 UTCJul 21, 13:30 UTC1h 35m
2026-07-20 CSC3910 SIN → TFU Jul 20, 12:05 UTCJul 21, 12:00 UTC23h 55m
2026-07-20 CSC3910 SIN → TFU Jul 20, 09:15 UTCJul 20, 12:20 UTC3h 5m
2026-07-20 CSC3909 TFU → SIN Jul 20, 04:20 UTCJul 20, 07:25 UTC3h 5m
2026-07-19 CSC3909 TFU → SIN Jul 19, 10:05 UTCJul 20, 07:25 UTC21h 20m
2026-07-19 CSC3909 TFU → SIN Jul 19, 09:05 UTCJul 20, 07:25 UTC22h 20m
2026-07-19 CSC3996 - Jul 19, 07:40 UTCJul 20, 06:00 UTC22h 20m
2026-07-18 CSC3995 - Jul 18, 12:35 UTCJul 19, 06:10 UTC17h 35m
2026-07-18 CSC3995 - Jul 18, 11:30 UTCJul 19, 06:10 UTC18h 40m
2026-07-17 CSC3935 - Jul 17, 18:10 UTCJul 18, 09:40 UTC15h 31m
2026-07-17 CSC3994 - Jul 17, 16:49 UTCJul 17, 17:05 UTC15m
2026-07-17 CSC3993 - Jul 17, 15:05 UTCJul 17, 15:20 UTC15m
2026-07-17 CSC3993 - Jul 17, 12:25 UTCJul 17, 14:04 UTC1h 40m
2026-07-15 CSC3994 - Jul 15, 16:35 UTCJul 15, 18:30 UTC1h 55m
2026-07-15 CSC3993 - Jul 15, 13:05 UTCJul 15, 14:50 UTC1h 45m
2026-07-14 CSC3993 - Jul 14, 14:20 UTCJul 15, 13:20 UTC22h 59m
2026-07-13 CSC3931 - Jul 13, 20:05 UTCJul 14, 14:30 UTC18h 25m
2026-07-13 CSC3931 - Jul 13, 18:45 UTCJul 14, 14:30 UTC19h 45m
2026-07-13 CSC3931 - Jul 13, 17:15 UTCJul 14, 14:30 UTC21h 15m
2026-07-13 CSC3993 - Jul 13, 15:35 UTCJul 13, 15:45 UTC10m
2026-07-13 CSC3993 - Jul 13, 13:05 UTCJul 13, 14:40 UTC1h 35m
2026-07-12 CSC3994 - Jul 12, 18:05 UTCJul 13, 14:40 UTC20h 35m
2026-07-12 CSC3994 - Jul 12, 16:25 UTCJul 13, 14:40 UTC22h 15m
2026-07-12 CSC3993 - Jul 12, 14:45 UTCJul 12, 14:55 UTC10m
2026-07-12 CSC3993 - Jul 12, 12:15 UTCJul 12, 13:45 UTC1h 30m
2026-07-11 CSC3910 - Jul 11, 09:15 UTCJul 11, 12:15 UTC3h 0m
2026-07-10 CSC3909 - Jul 10, 13:10 UTCJul 11, 07:15 UTC18h 5m
2026-07-10 CSC3909 - Jul 10, 10:05 UTCJul 11, 07:15 UTC21h 10m
2026-07-10 CSC3909 - Jul 10, 09:05 UTCJul 11, 07:15 UTC22h 10m
2026-07-09 CSC3931 - Jul 9, 14:15 UTCJul 10, 13:50 UTC23h 35m
2026-07-09 CSC3931 - Jul 9, 12:45 UTCJul 10, 10:50 UTC22h 5m
2026-07-09 CSC3931 - Jul 9, 10:05 UTCJul 10, 10:00 UTC23h 55m
2026-07-09 CSC3931 - Jul 9, 09:15 UTCJul 9, 14:25 UTC5h 10m
2026-07-08 CSC6880 - Jul 8, 00:40 UTCJul 8, 01:00 UTC20m
2026-07-07 CSC3996 - Jul 7, 08:45 UTCJul 7, 10:25 UTC1h 40m
2026-07-07 CSC3996 - Jul 7, 07:30 UTCJul 7, 07:50 UTC20m
2026-07-07 CSC3995 - Jul 7, 05:40 UTCJul 7, 05:55 UTC15m

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-307E page for operator, model, and routing details .

Mode-S 781640 frequently asked

What is Mode-S code 781640?
781640 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-307E.
Where is Mode-S 781640 registered?
Mode-S code 781640 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781640 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781640, octal 36013100, decimal 7,870,016.
What flights does 781640 operate?
Mode-S 781640 has broadcast 20 distinct callsigns, including CSC3993, CSC3909, CSC3994, CSC3910, CSC3931.