Apparatus

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sensors Mode-S transponder

781030

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8639 · AIRBUS A-321

Hex
781030
Octal
36010060
Decimal
7,868,464
Country
CN
Tail
B-8639
Type
A321
No current signal · last broadcast Jul 24, 15:15 UTC
Flights observed
126
Distinct callsigns
20
Country
CN
Last broadcast
Jul 24, 15:15 UTC

Last known position

Most recent position reported by Mode-S 781030.

Country allocation

The ICAO 24-bit address 781030 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
CSN5120 - 8 2026-07-21
CSN5119 China Southern Airlines 7 2026-07-21
CSN3516 - 7 2026-07-12
CSN8208 - 4 2026-07-14
CSN6709 - 4 2026-07-19
CSN6667 - 4 2026-07-09
CSN6786 China Southern Airlines 3 2026-07-20
CSN6766 - 3 2026-07-12
CSN6719 China Southern Airlines 3 2026-06-26
CSN6710 - 3 2026-07-19
CSN3978 China Southern Airlines 3 2026-05-22
CSN3566 - 3 2026-06-19
CSN3565 - 3 2026-06-19
CSN3271 - 3 2026-06-20
CSN8207 - 2 2026-07-14
CSN6794 China Southern Airlines 2 2026-06-21
CSN6793 - 2 2026-06-21
CSN6790 China Southern Airlines 2 2026-06-07
CSN6774 - 2 2026-06-22
CSN6754 China Southern Airlines 2 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CSN8938 - Jul 24, 15:05 UTCJul 24, 15:15 UTC10m
2026-07-24 - - Jul 24, 07:50 UTCJul 24, 08:00 UTC10m
2026-07-22 CSN6717 - Jul 22, 14:40 UTCJul 22, 14:55 UTC15m
2026-07-21 CSN6720 - Jul 21, 12:55 UTCJul 21, 16:00 UTC3h 5m
2026-07-21 CSN5120 - Jul 21, 09:25 UTCJul 21, 09:40 UTC15m
2026-07-21 CSN5119 SZX → HAK Jul 21, 07:30 UTCJul 21, 07:40 UTC10m
2026-07-20 CSN6786 CAN → HAK Jul 20, 04:10 UTCJul 20, 04:30 UTC20m
2026-07-19 CSN6710 - Jul 19, 13:15 UTCJul 19, 13:35 UTC20m
2026-07-19 CSN6710 - Jul 19, 10:25 UTCJul 19, 10:45 UTC20m
2026-07-19 CSN6709 - Jul 19, 02:15 UTCJul 19, 05:20 UTC3h 5m
2026-07-17 CSN6792 - Jul 17, 12:40 UTCJul 17, 12:50 UTC10m
2026-07-14 CSN8208 - Jul 14, 14:40 UTCJul 14, 14:50 UTC10m
2026-07-14 CSN8207 - Jul 14, 10:00 UTCJul 14, 10:15 UTC15m
2026-07-12 CSN3516 - Jul 12, 16:05 UTCJul 13, 10:50 UTC18h 45m
2026-07-12 CSN6766 - Jul 12, 15:45 UTCJul 13, 10:50 UTC19h 5m
2026-07-12 CSN6766 - Jul 12, 11:30 UTCJul 13, 09:45 UTC22h 15m
2026-07-12 CSN3516 - Jul 12, 08:05 UTCJul 13, 06:50 UTC22h 45m
2026-07-12 CSN3516 - Jul 12, 06:55 UTCJul 13, 06:01 UTC23h 5m
2026-07-12 CSN3516 - Jul 12, 03:15 UTCJul 12, 17:01 UTC13h 46m
2026-07-10 CSN6717 - Jul 10, 13:20 UTCJul 10, 13:30 UTC10m
2026-07-09 CSN6667 - Jul 9, 07:20 UTCJul 9, 14:00 UTC6h 40m
2026-07-08 CSN6667 - Jul 8, 15:00 UTCJul 9, 14:00 UTC23h 0m
2026-07-08 CSN6667 - Jul 8, 11:20 UTCJul 9, 07:35 UTC20h 15m
2026-07-08 CSN679V - Jul 8, 04:25 UTCJul 8, 04:40 UTC15m
2026-07-08 - - Jul 8, 00:35 UTCJul 8, 00:45 UTC10m
2026-07-07 CSN5120 - Jul 7, 14:00 UTCJul 7, 14:10 UTC10m
2026-07-07 CSN5119 - Jul 7, 08:15 UTCJul 7, 08:30 UTC15m
2026-07-06 CSN6150 - Jul 6, 05:05 UTCJul 6, 05:15 UTC10m
2026-06-30 CSN3431 HAK → KMG Jun 30, 00:04 UTCJun 30, 12:50 UTC12h 46m
2026-06-28 CSN8931 - Jun 28, 11:14 UTCJun 28, 11:35 UTC20m
2026-06-27 CSN3516 - Jun 27, 01:15 UTCJun 27, 06:50 UTC5h 35m
2026-06-26 CSN6720 PKX → HAK Jun 26, 14:09 UTCJun 26, 14:19 UTC10m
2026-06-26 CSN6719 HAK → PKX Jun 26, 11:00 UTCJun 26, 11:14 UTC15m
2026-06-25 CSN6719 HAK → PKX Jun 25, 12:40 UTCJun 25, 16:09 UTC3h 30m
2026-06-24 CSN6721 HAK → KMG Jun 24, 09:29 UTCJun 24, 13:34 UTC4h 5m
2026-06-23 CSN6722 KMG → HAK Jun 23, 13:05 UTCJun 23, 13:19 UTC15m
2026-06-23 CSN6721 HAK → KMG Jun 23, 09:24 UTCJun 23, 09:45 UTC20m
2026-06-22 CSN6719 HAK → PKX Jun 22, 11:04 UTCJun 22, 15:14 UTC4h 10m
2026-06-22 CSN6774 - Jun 22, 01:49 UTCJun 22, 02:00 UTC10m
2026-06-21 CSN6794 CAN → HAK Jun 21, 15:54 UTCJun 21, 16:04 UTC10m
2026-06-21 CSN6793 - Jun 21, 13:24 UTCJun 21, 13:39 UTC15m
2026-06-21 CSN6786 - Jun 21, 03:59 UTCJun 21, 04:10 UTC10m
2026-06-20 CSN6794 CAN → HAK Jun 20, 15:39 UTCJun 20, 15:54 UTC15m
2026-06-20 CSN3272 CGO → SZX Jun 20, 13:19 UTCJun 20, 13:39 UTC20m
2026-06-20 CSN3271 - Jun 20, 07:54 UTCJun 20, 08:09 UTC15m
2026-06-19 CSN8698 - Jun 19, 14:44 UTCJun 19, 14:59 UTC15m
2026-06-19 CSN8697 - Jun 19, 11:24 UTCJun 19, 12:14 UTC50m
2026-06-19 CSN3566 - Jun 19, 08:50 UTCJun 19, 09:19 UTC30m
2026-06-19 CSN3565 - Jun 19, 04:25 UTCJun 19, 04:34 UTC10m
2026-06-17 CSN6766 PVG → HAK Jun 17, 07:05 UTCJun 17, 16:35 UTC9h 30m

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-8639 page for operator, model, and routing details .

Mode-S 781030 frequently asked

What is Mode-S code 781030?
781030 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8639.
Where is Mode-S 781030 registered?
Mode-S code 781030 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781030 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 15:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781030, octal 36010060, decimal 7,868,464.
What flights does 781030 operate?
Mode-S 781030 has broadcast 20 distinct callsigns, including CSN5120, CSN5119, CSN3516, CSN8208, CSN6709.