Apparatus

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sensors Mode-S transponder

781934

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20EL · BOEING 787-9 Dreamliner

Hex
781934
Octal
36014464
Decimal
7,870,772
Country
CN
Tail
B-20EL
Type
B789
Broadcasting now · callsign CSN303 · 37,975 ft
Flights observed
126
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Current position

781934 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781934 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
CSN8065 - 13 2026-07-12
CSN680 - 11 2026-06-16
CSN653 - 11 2026-07-04
CSN8066 - 8 2026-07-12
CSN679 - 8 2026-06-16
CSN654 - 8 2026-07-05
CSN8172 China Southern Airlines 5 2026-06-21
CSN338 - 5 2026-07-03
CSN337 - 5 2026-07-03
CSN633 China Southern Airlines 4 2026-04-17
CSN391 - 4 2026-07-03
CSN8171 - 3 2026-06-20
CSN690 China Southern Airlines 3 2026-06-01
CSN634 China Southern Airlines 3 2026-04-18
CSN689 China Southern Airlines 2 2026-05-31
CSN392 China Southern Airlines 2 2026-04-21
CSN336 - 2 2026-07-11
CSN335 - 2 2026-07-10
CSN3081 China Southern Airlines 2 2026-05-08
CSN303 - 2 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN303 - Jul 14, 10:50 UTCJul 14, 14:35 UTC3h 45m
2026-07-12 CSN8066 - Jul 12, 11:40 UTCJul 12, 16:20 UTC4h 40m
2026-07-12 CSN8065 - Jul 12, 03:15 UTCJul 12, 03:35 UTC20m
2026-07-12 CSN8065 - Jul 12, 01:15 UTCJul 12, 02:35 UTC1h 20m
2026-07-11 CSN336 - Jul 11, 08:10 UTCJul 11, 08:35 UTC25m
2026-07-10 CSN336 - Jul 10, 21:25 UTCJul 11, 07:30 UTC10h 5m
2026-07-10 CSN335 - Jul 10, 17:50 UTCJul 10, 18:05 UTC15m
2026-07-10 CSN335 - Jul 10, 08:15 UTCJul 10, 15:55 UTC7h 40m
2026-07-10 CSN3533 - Jul 10, 00:20 UTCJul 10, 00:30 UTC10m
2026-07-09 CSN3830 - Jul 9, 15:35 UTCJul 9, 16:10 UTC35m
2026-07-07 CSN350 - Jul 7, 06:15 UTCJul 7, 06:30 UTC15m
2026-07-07 CSN349 - Jul 7, 03:50 UTCJul 7, 04:30 UTC40m
2026-07-06 CSN8066 - Jul 6, 11:35 UTCJul 6, 13:20 UTC1h 45m
2026-07-06 CSN8065 - Jul 6, 03:25 UTCJul 6, 03:50 UTC25m
2026-07-05 CSN8065 - Jul 5, 22:25 UTCJul 6, 02:45 UTC4h 20m
2026-07-05 CSN654 - Jul 5, 02:10 UTCJul 5, 22:30 UTC20h 20m
2026-07-04 CSN654 - Jul 4, 23:05 UTCJul 5, 22:30 UTC23h 25m
2026-07-04 CSN654 - Jul 4, 20:40 UTCJul 5, 02:55 UTC6h 15m
2026-07-04 CSN653 - Jul 4, 10:55 UTCJul 4, 17:55 UTC7h 0m
2026-07-03 CSN653 - Jul 3, 17:45 UTCJul 4, 17:00 UTC23h 15m
2026-07-03 CSN391 - Jul 3, 13:05 UTCJul 3, 16:05 UTC3h 0m
2026-07-03 CSN338 - Jul 3, 06:30 UTCJul 3, 07:15 UTC45m
2026-07-03 CSN337 - Jul 3, 04:10 UTCJul 3, 04:50 UTC40m
2026-07-02 CSN8066 - Jul 2, 11:35 UTCJul 2, 13:25 UTC1h 50m
2026-07-02 CSN8065 - Jul 2, 03:10 UTCJul 2, 03:30 UTC20m
2026-07-02 CSN8065 - Jul 2, 01:15 UTCJul 2, 02:30 UTC1h 15m
2026-07-01 CSN338 - Jul 1, 09:20 UTCJul 1, 09:30 UTC10m
2026-07-01 CSN338 - Jul 1, 06:35 UTCJul 1, 07:20 UTC45m
2026-07-01 CSN337 - Jul 1, 03:50 UTCJul 1, 04:35 UTC45m
2026-06-29 CSN8066 - Jun 29, 12:00 UTCJun 29, 13:49 UTC1h 50m
2026-06-29 CSN8065 - Jun 29, 03:44 UTCJun 29, 04:00 UTC15m
2026-06-29 CSN8065 - Jun 29, 01:39 UTCJun 29, 03:10 UTC1h 30m
2026-06-27 CSN654 - Jun 27, 20:34 UTCJun 28, 02:54 UTC6h 20m
2026-06-27 CSN653 - Jun 27, 07:19 UTCJun 27, 16:59 UTC9h 40m
2026-06-26 CSN653 - Jun 26, 16:20 UTCJun 27, 15:00 UTC22h 40m
2026-06-26 CSN653 - Jun 26, 13:04 UTCJun 27, 13:00 UTC23h 55m
2026-06-26 CSN8066 - Jun 26, 11:45 UTCJun 27, 10:50 UTC23h 5m
2026-06-26 CSN8065 - Jun 26, 04:30 UTCJun 26, 04:50 UTC20m
2026-06-26 CSN8065 - Jun 26, 02:30 UTCJun 26, 03:54 UTC1h 25m
2026-06-23 CSN654 - Jun 23, 20:40 UTCJun 24, 03:10 UTC6h 30m
2026-06-23 CSN653 - Jun 23, 09:45 UTCJun 23, 16:39 UTC6h 55m
2026-06-22 CSN6901 - Jun 22, 04:40 UTCJun 22, 04:54 UTC15m
2026-06-21 CSN6902 - Jun 21, 07:25 UTCJun 21, 07:45 UTC20m
2026-06-21 CSN8172 ICN → CGQ Jun 21, 00:40 UTCJun 21, 00:49 UTC10m
2026-06-20 CSN8172 ICN → CGQ Jun 20, 17:49 UTCJun 20, 22:10 UTC4h 20m
2026-06-20 CSN8171 - Jun 20, 07:19 UTCJun 20, 14:50 UTC7h 30m
2026-06-19 CSN6913 URC → PKX Jun 19, 14:09 UTCJun 19, 14:24 UTC15m
2026-06-18 CSN6036 - Jun 18, 22:35 UTCJun 19, 03:20 UTC4h 44m
2026-06-18 CSN6035 URC → IST Jun 18, 13:15 UTCJun 18, 17:50 UTC4h 35m
2026-06-16 CSN680 - Jun 16, 12:45 UTCJun 16, 14:35 UTC1h 50m

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-20EL page for operator, model, and routing details .

Mode-S 781934 frequently asked

What is Mode-S code 781934?
781934 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20EL.
Where is Mode-S 781934 registered?
Mode-S code 781934 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781934 broadcasting right now?
Yes. Mode-S 781934 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781934, octal 36014464, decimal 7,870,772.
What flights does 781934 operate?
Mode-S 781934 has broadcast 20 distinct callsigns, including CSN8065, CSN680, CSN653, CSN8066, CSN679.