Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781620

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-306J · AIRBUS A-321neo

Hex
781620
Octal
36013040
Decimal
7,869,984
Country
CN
Tail
B-306J
Type
A21N
No current signal · last broadcast 4h ago
Flights observed
130
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 781620.

Country allocation

The ICAO 24-bit address 781620 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
CSN3744 - 8 2026-06-26
CSN3615 - 8 2026-07-14
CSN6277 - 7 2026-07-11
CSN5919 China Southern Airlines 6 2026-05-08
CSN3459 China Southern Airlines 6 2026-05-09
CSN3906 - 5 2026-06-21
CSN3905 China Southern Airlines 5 2026-06-22
CSN3624 - 5 2026-07-13
CSN6086 - 4 2026-07-12
CSN6085 - 4 2026-07-11
CSN3743 - 4 2026-06-25
CSN8635 - 3 2026-06-15
CSN6274 - 3 2026-07-01
CSN5974 China Southern Airlines 3 2026-05-26
CSN5973 - 3 2026-07-05
CSN5300 China Southern Airlines 3 2026-05-28
CSN3616 China Southern Airlines 3 2026-06-11
CSN3040 China Southern Airlines 3 2026-06-10
CSN3039 China Southern Airlines 3 2026-06-10
CSN6273 - 2 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN3615 - Jul 14, 03:25 UTCJul 14, 14:15 UTC10h 50m
2026-07-13 CSN3624 - Jul 13, 18:20 UTCJul 13, 18:30 UTC10m
2026-07-13 CSN3624 - Jul 13, 13:35 UTCJul 13, 13:50 UTC15m
2026-07-12 CSN3624 - Jul 12, 14:05 UTCJul 13, 13:50 UTC23h 45m
2026-07-12 CSN6086 - Jul 12, 04:15 UTCJul 12, 14:05 UTC9h 50m
2026-07-11 CSN6085 - Jul 11, 14:55 UTCJul 12, 02:15 UTC11h 20m
2026-07-11 CSN6277 - Jul 11, 01:15 UTCJul 11, 01:25 UTC10m
2026-07-09 CSN6277 - Jul 9, 01:20 UTCJul 9, 16:15 UTC14h 55m
2026-07-08 CSN6277 - Jul 8, 15:25 UTCJul 9, 01:30 UTC10h 5m
2026-07-08 CSN6277 - Jul 8, 01:20 UTCJul 8, 01:30 UTC10m
2026-07-07 CSN6202 - Jul 7, 17:05 UTCJul 7, 17:20 UTC15m
2026-07-07 CSN6218 - Jul 7, 10:50 UTCJul 7, 11:00 UTC10m
2026-07-07 CSN6204 - Jul 7, 00:45 UTCJul 7, 00:55 UTC10m
2026-07-05 CSN5973 - Jul 5, 01:15 UTCJul 5, 01:25 UTC10m
2026-07-04 CSN6220 - Jul 4, 04:15 UTCJul 5, 01:25 UTC21h 10m
2026-07-02 CSN6202 - Jul 2, 14:45 UTCJul 2, 14:55 UTC10m
2026-07-02 CSN6218 - Jul 2, 08:10 UTCJul 2, 08:25 UTC15m
2026-07-02 CSN6204 - Jul 2, 00:55 UTCJul 2, 01:05 UTC10m
2026-07-01 CSN6274 - Jul 1, 09:15 UTCJul 1, 09:30 UTC15m
2026-07-01 CSN6274 - Jul 1, 06:50 UTCJul 1, 07:05 UTC15m
2026-07-01 CSN5862 - Jul 1, 04:40 UTCJul 1, 04:50 UTC10m
2026-06-30 CSN5861 - Jun 30, 23:20 UTCJun 30, 23:35 UTC15m
2026-06-30 CSN3920 NNY → SZX Jun 30, 16:40 UTCJun 30, 17:00 UTC20m
2026-06-30 CSN3919 SZX → NNY Jun 30, 12:20 UTCJun 30, 12:30 UTC10m
2026-06-30 CSN8477 - Jun 30, 02:55 UTCJun 30, 03:05 UTC10m
2026-06-29 CSN6273 - Jun 29, 05:30 UTCJun 29, 05:40 UTC10m
2026-06-28 CSN6277 - Jun 28, 01:10 UTCJun 28, 01:19 UTC10m
2026-06-27 CSN6220 - Jun 27, 04:19 UTCJun 27, 04:29 UTC10m
2026-06-27 CSN6219 - Jun 27, 01:49 UTCJun 27, 01:59 UTC10m
2026-06-26 CSN3744 - Jun 26, 11:55 UTCJun 26, 12:19 UTC25m
2026-06-26 CSN3744 - Jun 26, 09:35 UTCJun 26, 09:50 UTC15m
2026-06-25 CSN3743 - Jun 25, 16:35 UTCJun 26, 04:55 UTC12h 20m
2026-06-25 CSN6277 - Jun 25, 01:04 UTCJun 25, 01:14 UTC10m
2026-06-24 CSN6277 - Jun 24, 01:24 UTCJun 24, 01:34 UTC10m
2026-06-22 CSN3905 CAN → HRB Jun 22, 07:00 UTCJun 23, 01:30 UTC18h 30m
2026-06-22 CSN3615 - Jun 22, 02:54 UTCJun 23, 01:30 UTC22h 35m
2026-06-21 CSN3615 - Jun 21, 13:39 UTCJun 22, 07:10 UTC17h 30m
2026-06-21 CSN3615 - Jun 21, 08:49 UTCJun 22, 07:10 UTC22h 20m
2026-06-21 CSN3906 - Jun 21, 02:15 UTCJun 21, 13:54 UTC11h 40m
2026-06-20 CSN3906 - Jun 20, 14:05 UTCJun 21, 13:54 UTC23h 50m
2026-06-20 CSN3905 CAN → HRB Jun 20, 13:55 UTCJun 21, 09:04 UTC19h 10m
2026-06-20 CSN3905 CAN → HRB Jun 20, 07:00 UTCJun 21, 02:30 UTC19h 30m
2026-06-20 CSN3615 - Jun 20, 02:59 UTCJun 20, 14:09 UTC11h 10m
2026-06-19 CSN3624 HRB → CAN Jun 19, 13:29 UTCJun 20, 07:14 UTC17h 45m
2026-06-19 CSN6274 - Jun 19, 06:54 UTCJun 19, 07:09 UTC15m
2026-06-19 CSN6273 - Jun 19, 04:44 UTCJun 19, 05:09 UTC25m
2026-06-15 CSN8635 - Jun 15, 10:09 UTCJun 15, 10:55 UTC45m
2026-06-14 CSN6141 - Jun 14, 00:15 UTCJun 14, 10:15 UTC10h 0m
2026-06-13 CSN6141 - Jun 13, 15:55 UTCJun 14, 10:15 UTC18h 20m
2026-06-13 CSN5968 PKX → HRB Jun 13, 03:25 UTCJun 13, 03:35 UTC10m

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-306J page for operator, model, and routing details .

Mode-S 781620 frequently asked

What is Mode-S code 781620?
781620 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-306J.
Where is Mode-S 781620 registered?
Mode-S code 781620 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781620 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781620, octal 36013040, decimal 7,869,984.
What flights does 781620 operate?
Mode-S 781620 has broadcast 20 distinct callsigns, including CSN3744, CSN3615, CSN6277, CSN5919, CSN3459.