Apparatus

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sensors Mode-S transponder

78109B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8676 · AIRBUS A-321

Hex
78109B
Octal
36010233
Decimal
7,868,571
Country
CN
Tail
B-8676
Type
A321
No current signal · last broadcast Jul 26, 11:30 UTC
Flights observed
132
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:30 UTC

Last known position

Most recent position reported by Mode-S 78109B.

Country allocation

The ICAO 24-bit address 78109B 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
CSN3516 China Southern Airlines 10 2026-07-20
CSN5120 - 9 2026-07-03
CSN5119 - 8 2026-07-03
CSN6794 China Southern Airlines 4 2026-05-22
CSN6793 - 4 2026-07-03
CSN6786 China Southern Airlines 4 2026-07-22
CSN6778 - 4 2026-07-17
CSN6630 - 4 2026-07-12
CSN3566 China Southern Airlines 4 2026-05-26
CSN3565 China Southern Airlines 4 2026-05-26
CSN3515 - 4 2026-07-19
CSN8208 - 3 2026-07-06
CSN6792 - 3 2026-07-14
CSN6766 - 3 2026-07-20
CSN6686 - 3 2026-07-18
CSN6685 - 3 2026-06-25
CSN3432 - 3 2026-07-06
CSN3271 China Southern Airlines 3 2026-05-25
CSN8324 China Southern Airlines 2 2026-04-24
CSN8323 China Southern Airlines 2 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN6729 SYX → CAN Jul 26, 11:20 UTCJul 26, 11:30 UTC10m
2026-07-24 - - Jul 24, 01:05 UTCJul 24, 01:15 UTC10m
2026-07-22 CSN6786 CAN → HAK Jul 22, 04:00 UTCJul 22, 04:15 UTC15m
2026-07-21 CSN6443 SZX → HAK Jul 21, 22:50 UTCJul 21, 23:05 UTC15m
2026-07-21 CSN3956 HAK → SZX Jul 21, 18:55 UTCJul 21, 19:20 UTC25m
2026-07-21 CSN6710 - Jul 21, 13:15 UTCJul 21, 13:55 UTC40m
2026-07-21 CSN6709 - Jul 21, 02:05 UTCJul 21, 02:20 UTC15m
2026-07-20 CSN6766 - Jul 20, 09:45 UTCJul 20, 18:50 UTC9h 5m
2026-07-20 CSN3516 PVG → HAK Jul 20, 07:05 UTCJul 20, 07:20 UTC15m
2026-07-19 CSN6766 - Jul 19, 06:45 UTCJul 19, 16:50 UTC10h 5m
2026-07-19 CSN3515 - Jul 19, 01:25 UTCJul 19, 02:45 UTC1h 20m
2026-07-18 CSN6686 - Jul 18, 04:55 UTCJul 18, 19:00 UTC14h 5m
2026-07-17 CSN6778 - Jul 17, 09:35 UTCJul 17, 09:45 UTC10m
2026-07-16 CSN6778 - Jul 16, 09:40 UTCJul 16, 09:50 UTC10m
2026-07-15 CSN3516 - Jul 15, 01:40 UTCJul 15, 16:30 UTC14h 50m
2026-07-14 CSN6792 - Jul 14, 10:55 UTCJul 14, 11:10 UTC15m
2026-07-12 CSN6630 - Jul 12, 12:05 UTCJul 13, 04:50 UTC16h 45m
2026-07-12 CSN6630 - Jul 12, 07:20 UTCJul 13, 04:50 UTC21h 30m
2026-07-12 CSN6630 - Jul 12, 00:40 UTCJul 12, 12:20 UTC11h 40m
2026-07-11 CSN6630 - Jul 11, 15:45 UTCJul 12, 12:20 UTC20h 35m
2026-07-11 CSN6732 - Jul 11, 02:30 UTCJul 11, 10:15 UTC7h 45m
2026-07-09 CSN6748 - Jul 9, 22:50 UTCJul 10, 10:50 UTC12h 0m
2026-07-06 CSN8208 - Jul 6, 14:35 UTCJul 6, 14:55 UTC20m
2026-07-06 CSN3432 - Jul 6, 05:40 UTCJul 6, 05:50 UTC10m
2026-07-05 CSN6398 CGO → HAK Jul 5, 16:40 UTCJul 5, 16:55 UTC15m
2026-07-04 CSN8208 - Jul 4, 16:10 UTCJul 4, 16:55 UTC45m
2026-07-04 CSN865Y - Jul 4, 04:50 UTCJul 4, 05:15 UTC25m
2026-07-04 CSN8588 - Jul 4, 00:55 UTCJul 4, 01:10 UTC15m
2026-07-03 CSN8587 - Jul 3, 17:05 UTCJul 3, 17:15 UTC10m
2026-07-03 CSN6793 - Jul 3, 13:45 UTCJul 3, 13:55 UTC10m
2026-07-03 CSN5120 - Jul 3, 09:30 UTCJul 3, 09:40 UTC10m
2026-07-03 CSN5119 - Jul 3, 07:15 UTCJul 3, 07:35 UTC20m
2026-07-02 CSN6792 - Jul 2, 10:55 UTCJul 2, 11:05 UTC10m
2026-07-02 CSN6786 - Jul 2, 03:55 UTCJul 2, 04:10 UTC15m
2026-06-30 CSN6766 - Jun 30, 15:00 UTCJun 30, 16:10 UTC1h 10m
2026-06-29 CSN6740 - Jun 29, 15:04 UTCJun 30, 07:05 UTC16h 1m
2026-06-29 CSN6739 - Jun 29, 11:55 UTCJun 30, 07:05 UTC19h 11m
2026-06-29 CSN6584 - Jun 29, 04:50 UTCJun 29, 08:44 UTC3h 55m
2026-06-28 CSN6667 - Jun 28, 07:05 UTCJun 28, 13:14 UTC6h 10m
2026-06-28 CSN6700 - Jun 28, 00:09 UTCJun 28, 04:29 UTC4h 20m
2026-06-27 CSN6189 SYX → TFU Jun 27, 06:54 UTCJun 27, 12:45 UTC5h 50m
2026-06-25 CSN6686 PVG → HAK Jun 25, 13:24 UTCJun 26, 07:14 UTC17h 50m
2026-06-25 CSN6685 - Jun 25, 08:14 UTCJun 25, 13:40 UTC5h 25m
2026-06-24 CSN6685 - Jun 24, 15:14 UTCJun 25, 13:40 UTC22h 25m
2026-06-24 CSN6685 - Jun 24, 10:04 UTCJun 25, 08:30 UTC22h 25m
2026-06-24 CSN6786 - Jun 24, 03:50 UTCJun 24, 04:00 UTC10m
2026-06-23 CSN6784 - Jun 23, 12:49 UTCJun 23, 13:00 UTC10m
2026-06-23 CSN3515 - Jun 23, 01:25 UTCJun 23, 06:29 UTC5h 5m
2026-06-21 CSN6738 - Jun 21, 11:44 UTCJun 21, 12:19 UTC35m
2026-06-21 CSN8614 WUH → HAK Jun 21, 06:14 UTCJun 21, 06:35 UTC20m

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-8676 page for operator, model, and routing details .

Mode-S 78109B frequently asked

What is Mode-S code 78109B?
78109B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8676.
Where is Mode-S 78109B registered?
Mode-S code 78109B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78109B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78109B, octal 36010233, decimal 7,868,571.
What flights does 78109B operate?
Mode-S 78109B has broadcast 20 distinct callsigns, including CSN3516, CSN5120, CSN5119, CSN6794, CSN6793.