Apparatus

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sensors Mode-S transponder

78109A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8675 · AIRBUS A-321

Hex
78109A
Octal
36010232
Decimal
7,868,570
Country
CN
Tail
B-8675
Type
A321
Broadcasting now · callsign CSN3157 · 20,975 ft
Flights observed
99
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Current position

78109A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 78109A 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 - 12 2026-07-06
CSN6766 - 11 2026-07-02
CSN5120 - 5 2026-07-13
CSN5119 - 5 2026-07-13
CSN3515 - 5 2026-07-06
CSN8207 - 4 2026-07-03
CSN6794 - 4 2026-07-05
CSN6710 - 4 2026-07-12
CSN6709 - 4 2026-07-12
CSN6786 - 3 2026-07-13
CSN6774 - 3 2026-07-09
CSN6765 - 3 2026-07-06
CSN6722 China Southern Airlines 3 2026-06-28
CSN8993 China Southern Airlines 2 2026-05-19
CSN8208 China Southern Airlines 2 2026-04-30
CSN6793 - 2 2026-07-05
CSN6778 China Southern Airlines 2 2026-04-29
CSN6776 - 2 2026-07-08
CSN6685 - 2 2026-07-07
CSN5457 China Southern Airlines 2 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSN5120 - Jul 13, 08:35 UTCJul 13, 08:45 UTC10m
2026-07-13 CSN5119 - Jul 13, 06:35 UTCJul 13, 06:50 UTC15m
2026-07-13 CSN6786 - Jul 13, 03:55 UTCJul 13, 04:05 UTC10m
2026-07-12 CSN6710 - Jul 12, 12:55 UTCJul 12, 13:35 UTC40m
2026-07-12 CSN6709 - Jul 12, 02:01 UTCJul 12, 05:10 UTC3h 10m
2026-07-09 CSN6774 - Jul 9, 01:55 UTCJul 9, 02:05 UTC10m
2026-07-08 CSN6776 - Jul 8, 19:15 UTCJul 8, 19:25 UTC10m
2026-07-08 CSN6710 - Jul 8, 13:15 UTCJul 8, 13:55 UTC40m
2026-07-07 CSN6685 - Jul 7, 08:35 UTCJul 8, 03:35 UTC19h 0m
2026-07-07 CSN6685 - Jul 7, 08:05 UTCJul 8, 03:35 UTC19h 30m
2026-07-06 CSN6765 - Jul 6, 12:00 UTCJul 6, 17:10 UTC5h 10m
2026-07-06 CSN3516 - Jul 6, 06:45 UTCJul 6, 07:00 UTC15m
2026-07-06 CSN3515 - Jul 6, 01:15 UTCJul 6, 02:35 UTC1h 20m
2026-07-05 CSN6794 - Jul 5, 18:10 UTCJul 5, 18:30 UTC20m
2026-07-05 CSN6793 - Jul 5, 16:05 UTCJul 5, 16:15 UTC10m
2026-07-03 CSN8207 - Jul 3, 09:50 UTCJul 4, 02:40 UTC16h 50m
2026-07-03 CSN8207 - Jul 3, 04:15 UTCJul 4, 02:30 UTC22h 15m
2026-07-02 CSN6766 - Jul 2, 15:25 UTCJul 3, 10:05 UTC18h 40m
2026-07-02 CSN6766 - Jul 2, 11:05 UTCJul 3, 10:05 UTC23h 0m
2026-07-02 CSN6766 - Jul 2, 06:45 UTCJul 3, 04:30 UTC21h 45m
2026-07-02 CSN6766 - Jul 2, 05:45 UTCJul 3, 04:30 UTC22h 45m
2026-07-02 CSN6766 - Jul 2, 01:15 UTCJul 3, 00:30 UTC23h 15m
2026-06-30 CSN8614 - Jun 30, 06:00 UTCJun 30, 06:20 UTC20m
2026-06-28 CSN6722 KMG → HAK Jun 28, 09:30 UTCJun 28, 13:25 UTC3h 55m
2026-06-27 CSN6766 - Jun 27, 15:10 UTCJun 27, 15:19 UTC10m
2026-06-26 CSN6726 - Jun 26, 02:09 UTCJun 26, 16:05 UTC13h 55m
2026-06-25 CSN6722 KMG → HAK Jun 25, 09:34 UTCJun 25, 13:29 UTC3h 55m
2026-06-23 CSN6794 CAN → HAK Jun 23, 15:59 UTCJun 23, 16:20 UTC20m
2026-06-23 CSN5120 - Jun 23, 08:30 UTCJun 23, 08:39 UTC10m
2026-06-23 CSN5119 - Jun 23, 06:34 UTCJun 23, 06:49 UTC15m
2026-06-23 CSN6774 - Jun 23, 01:59 UTCJun 23, 02:09 UTC10m
2026-06-22 CSN8207 - Jun 22, 09:54 UTCJun 22, 15:10 UTC5h 15m
2026-06-18 CSN6722 KMG → HAK Jun 18, 12:50 UTCJun 18, 13:15 UTC25m
2026-06-18 CSN3516 - Jun 18, 01:25 UTCJun 18, 06:50 UTC5h 25m
2026-06-16 CSN3516 - Jun 16, 01:19 UTCJun 16, 15:00 UTC13h 40m
2026-06-15 CSN6710 - Jun 15, 13:30 UTCJun 16, 10:00 UTC20h 30m
2026-06-15 CSN6709 - Jun 15, 01:59 UTCJun 15, 05:10 UTC3h 10m
2026-06-14 CSN6709 - Jun 14, 06:40 UTCJun 15, 05:10 UTC22h 30m
2026-06-13 CSN3515 - Jun 13, 14:50 UTCJun 14, 06:45 UTC15h 56m
2026-06-13 CSN8207 HAK → HGH Jun 13, 09:40 UTCJun 14, 06:45 UTC21h 5m
2026-06-12 CSN6766 PVG → HAK Jun 12, 10:35 UTCJun 13, 06:20 UTC19h 44m
2026-06-12 CSN6765 HAK → PVG Jun 12, 10:00 UTCJun 13, 06:20 UTC20h 19m
2026-06-12 CSN3516 PVG → HAK Jun 12, 06:35 UTCJun 13, 06:20 UTC23h 44m
2026-06-12 CSN3516 PVG → HAK Jun 12, 01:15 UTCJun 12, 16:05 UTC14h 50m
2026-06-11 CSN3516 PVG → HAK Jun 11, 06:40 UTCJun 12, 06:30 UTC23h 51m
2026-06-11 CSN3516 PVG → HAK Jun 11, 05:45 UTCJun 12, 01:20 UTC19h 35m
2026-06-11 CSN3516 PVG → HAK Jun 11, 02:35 UTCJun 12, 01:20 UTC22h 46m
2026-06-11 CSN3515 HAK → PVG Jun 11, 01:40 UTCJun 11, 06:55 UTC5h 15m
2026-06-10 CSN3515 HAK → PVG Jun 10, 08:20 UTCJun 11, 06:25 UTC22h 5m
2026-06-09 CSN6766 PVG → HAK Jun 9, 14:50 UTCJun 10, 08:25 UTC17h 35m

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-8675 page for operator, model, and routing details .

Mode-S 78109A frequently asked

What is Mode-S code 78109A?
78109A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8675.
Where is Mode-S 78109A registered?
Mode-S code 78109A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78109A broadcasting right now?
Yes. Mode-S 78109A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78109A, octal 36010232, decimal 7,868,570.
What flights does 78109A operate?
Mode-S 78109A has broadcast 20 distinct callsigns, including CSN3516, CSN6766, CSN5120, CSN5119, CSN3515.