Apparatus

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sensors Mode-S transponder

78105A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1539 · BOEING 787-9 Dreamliner

Hex
78105A
Octal
36010132
Decimal
7,868,506
Country
CN
Tail
B-1539
Type
B789
No current signal · last broadcast 6h ago
Flights observed
171
Distinct callsigns
20
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 78105A.

Country allocation

The ICAO 24-bit address 78105A 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
CHH7925 - 40 2026-07-13
CHH7926 - 34 2026-07-13
CHH492 - 12 2026-07-10
CHH491 - 11 2026-07-09
CHH7707 - 7 2026-07-14
CHH489 Hainan Airlines 5 2026-05-10
CHH7713 - 4 2026-06-28
CHH7712 - 3 2026-07-14
CHH495 - 3 2026-07-11
CHH490 Hainan Airlines 3 2026-05-10
CHH472 Hainan Airlines 3 2026-05-12
CHH7974 Hainan Airlines 2 2026-06-15
CHH7973 - 2 2026-06-14
CHH7852 Hainan Airlines 2 2026-06-22
CHH7851 - 2 2026-06-28
CHH7716 Hainan Airlines 2 2026-05-31
CHH7709 Hainan Airlines 2 2026-05-06
CHH7708 - 2 2026-06-28
CHH7701 Hainan Airlines 2 2026-04-23
CHH7157 - 2 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CHH7712 - Jul 14, 10:35 UTCJul 14, 10:45 UTC10m
2026-07-14 CHH7707 - Jul 14, 08:05 UTCJul 14, 08:20 UTC15m
2026-07-14 CHH7707 - Jul 14, 05:45 UTCJul 14, 06:05 UTC20m
2026-07-13 CHH7926 - Jul 13, 13:30 UTCJul 13, 19:15 UTC5h 45m
2026-07-13 CHH7926 - Jul 13, 08:45 UTCJul 13, 11:25 UTC2h 40m
2026-07-13 CHH7925 - Jul 13, 06:55 UTCJul 13, 07:10 UTC15m
2026-07-13 CHH7925 - Jul 13, 04:10 UTCJul 13, 05:15 UTC1h 5m
2026-07-12 CHH7925 - Jul 12, 18:25 UTCJul 13, 00:25 UTC6h 0m
2026-07-11 CHH496 - Jul 11, 18:25 UTCJul 12, 05:05 UTC10h 40m
2026-07-11 CHH495 - Jul 11, 06:30 UTCJul 11, 16:00 UTC9h 30m
2026-07-10 CHH492 - Jul 10, 11:40 UTCJul 10, 17:45 UTC6h 5m
2026-07-09 CHH491 - Jul 9, 19:30 UTCJul 10, 05:05 UTC9h 35m
2026-07-09 CHH7712 - Jul 9, 12:05 UTCJul 9, 12:20 UTC15m
2026-07-09 CHH7707 - Jul 9, 10:10 UTCJul 9, 10:20 UTC10m
2026-07-09 CHH7707 - Jul 9, 07:55 UTCJul 9, 08:10 UTC15m
2026-07-08 CHH7926 - Jul 8, 14:15 UTCJul 8, 20:15 UTC6h 0m
2026-07-08 CHH7926 - Jul 8, 09:20 UTCJul 8, 12:15 UTC2h 55m
2026-07-08 CHH7925 - Jul 8, 07:30 UTCJul 8, 07:35 UTC5m
2026-07-08 CHH7925 - Jul 8, 04:45 UTCJul 8, 05:55 UTC1h 10m
2026-07-07 CHH7925 - Jul 7, 19:30 UTCJul 8, 01:20 UTC5h 50m
2026-07-06 CHH7926 - Jul 6, 14:35 UTCJul 6, 20:15 UTC5h 40m
2026-07-06 CHH7926 - Jul 6, 09:55 UTCJul 6, 12:50 UTC2h 55m
2026-07-06 CHH7925 - Jul 6, 07:50 UTCJul 6, 08:00 UTC10m
2026-07-06 CHH7925 - Jul 6, 05:10 UTCJul 6, 06:10 UTC1h 0m
2026-07-05 CHH7925 - Jul 5, 19:35 UTCJul 6, 01:40 UTC6h 5m
2026-07-05 CHH7925 - Jul 5, 13:30 UTCJul 5, 13:40 UTC10m
2026-07-04 CHH492 - Jul 4, 12:00 UTCJul 4, 18:05 UTC6h 5m
2026-07-03 CHH491 - Jul 3, 22:35 UTCJul 4, 05:10 UTC6h 35m
2026-07-03 CHH491 - Jul 3, 19:25 UTCJul 3, 19:40 UTC15m
2026-07-03 CHH7246 - Jul 3, 15:10 UTCJul 3, 15:20 UTC10m
2026-07-03 CHH7245 - Jul 3, 06:45 UTCJul 3, 06:55 UTC10m
2026-07-02 CHH7908 CDG → XIY Jul 2, 11:40 UTCJul 3, 04:15 UTC16h 35m
2026-07-01 CHH7907 - Jul 1, 21:55 UTCJul 2, 04:55 UTC7h 0m
2026-06-28 CHH7851 - Jun 28, 22:49 UTCJun 28, 23:04 UTC15m
2026-06-28 CHH7713 - Jun 28, 16:05 UTCJun 28, 16:25 UTC20m
2026-06-28 CHH7713 - Jun 28, 13:45 UTCJun 28, 13:59 UTC15m
2026-06-28 CHH7708 - Jun 28, 11:00 UTCJun 28, 11:09 UTC10m
2026-06-28 CHH7708 - Jun 28, 08:34 UTCJun 28, 08:44 UTC10m
2026-06-27 CHH7157 - Jun 27, 23:55 UTCJun 28, 00:04 UTC10m
2026-06-27 CHH7713 - Jun 27, 16:14 UTCJun 27, 16:35 UTC20m
2026-06-27 CHH7713 - Jun 27, 13:00 UTCJun 27, 13:09 UTC10m
2026-06-26 CHH492 - Jun 26, 21:04 UTCJun 26, 21:20 UTC15m
2026-06-26 CHH492 - Jun 26, 12:14 UTCJun 26, 18:29 UTC6h 15m
2026-06-25 CHH491 - Jun 25, 19:20 UTCJun 26, 04:34 UTC9h 15m
2026-06-25 CHH7712 - Jun 25, 11:54 UTCJun 25, 12:04 UTC10m
2026-06-25 CHH7707 - Jun 25, 09:25 UTCJun 25, 09:50 UTC25m
2026-06-25 CHH7707 - Jun 25, 07:09 UTCJun 25, 07:25 UTC15m
2026-06-25 CHH7704 - Jun 25, 02:54 UTCJun 25, 03:04 UTC10m
2026-06-22 CHH7852 URC → SZX Jun 22, 15:54 UTCJun 22, 16:05 UTC10m
2026-06-21 CHH6224 PEK → URC Jun 21, 13:39 UTCJun 21, 13:59 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-1539 page for operator, model, and routing details .

Mode-S 78105A frequently asked

What is Mode-S code 78105A?
78105A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1539.
Where is Mode-S 78105A registered?
Mode-S code 78105A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78105A broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78105A, octal 36010132, decimal 7,868,506.
What flights does 78105A operate?
Mode-S 78105A has broadcast 20 distinct callsigns, including CHH7925, CHH7926, CHH492, CHH491, CHH7707.