Apparatus

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sensors Mode-S transponder

78105D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1542 · BOEING 737-800

Hex
78105D
Octal
36010135
Decimal
7,868,509
Country
CN
Tail
B-1542
Type
B738
No current signal · last broadcast 9h ago
Flights observed
93
Distinct callsigns
20
Country
CN
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 78105D.

Country allocation

The ICAO 24-bit address 78105D 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
CHH7302 Hainan Airlines 6 2026-06-20
CHH7301 Hainan Airlines 4 2026-06-20
CHH7741 - 3 2026-07-22
CHH7386 - 3 2026-06-18
CHH7322 - 3 2026-07-17
CHH7883 - 2 2026-07-19
CHH7709 Hainan Airlines 2 2026-05-08
CHH7698 Hainan Airlines 2 2026-05-04
CHH7644 Hainan Airlines 2 2026-06-06
CHH7535 - 2 2026-06-29
CHH7468 - 2 2026-07-08
CHH7467 - 2 2026-07-08
CHH7338 - 2 2026-06-28
CHH7337 - 2 2026-06-26
CHH7235 - 2 2026-07-18
CHH7187 - 2 2026-07-15
CHH7143 Hainan Airlines 2 2026-06-23
CHH7123 Hainan Airlines 2 2026-06-04
CHH7982 Hainan Airlines 1 2026-05-07
CHH7981 Hainan Airlines 1 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 CHH7741 - Jul 22, 04:10 UTCJul 22, 04:20 UTC10m
2026-07-21 CHH7209 TNA → HRB Jul 21, 04:55 UTCJul 21, 09:50 UTC4h 55m
2026-07-20 CHH7579 - Jul 20, 14:35 UTCJul 21, 09:50 UTC19h 15m
2026-07-20 CHH7164 NKG → SZX Jul 20, 04:45 UTCJul 20, 05:15 UTC30m
2026-07-19 CHH7884 - Jul 19, 06:15 UTCJul 19, 06:25 UTC10m
2026-07-19 CHH7883 - Jul 19, 00:05 UTCJul 19, 00:20 UTC15m
2026-07-18 CHH7645 - Jul 18, 11:40 UTCJul 18, 11:50 UTC10m
2026-07-18 CHH7236 - Jul 18, 09:35 UTCJul 18, 09:45 UTC10m
2026-07-18 CHH7235 - Jul 18, 03:20 UTCJul 18, 03:30 UTC10m
2026-07-17 CHH7322 - Jul 17, 00:55 UTCJul 17, 04:39 UTC3h 45m
2026-07-15 CHH7187 - Jul 15, 00:40 UTCJul 15, 01:00 UTC20m
2026-07-10 CHH7235 - Jul 10, 03:10 UTCJul 10, 03:30 UTC20m
2026-07-09 CHH7054 - Jul 9, 03:05 UTCJul 9, 06:00 UTC2h 55m
2026-07-08 CHH7468 - Jul 8, 10:55 UTCJul 8, 11:05 UTC10m
2026-07-08 CHH7467 - Jul 8, 07:35 UTCJul 8, 08:20 UTC45m
2026-07-07 CHH7468 - Jul 7, 10:05 UTCJul 7, 10:15 UTC10m
2026-07-07 CHH7467 - Jul 7, 05:50 UTCJul 7, 06:35 UTC45m
2026-07-06 CHH7053 - Jul 6, 06:45 UTCJul 6, 07:00 UTC15m
2026-07-03 CHH7320 - Jul 3, 13:30 UTCJul 4, 02:45 UTC13h 15m
2026-07-03 CHH720 - Jul 3, 09:10 UTCJul 3, 09:25 UTC15m
2026-07-03 CHH719 - Jul 3, 07:00 UTCJul 3, 07:05 UTC5m
2026-07-02 CHH7741 - Jul 2, 02:55 UTCJul 2, 03:05 UTC10m
2026-07-02 CHH7726 - Jul 2, 01:10 UTCJul 2, 01:30 UTC20m
2026-06-30 CHH7322 - Jun 30, 23:45 UTCJul 1, 04:40 UTC4h 55m
2026-06-30 CHH7322 - Jun 30, 05:10 UTCJul 1, 01:00 UTC19h 50m
2026-06-29 CHH7535 - Jun 29, 15:24 UTCJun 30, 05:10 UTC13h 45m
2026-06-29 CHH7712 - Jun 29, 11:25 UTCJun 29, 11:35 UTC10m
2026-06-29 CHH7707 - Jun 29, 05:59 UTCJun 29, 06:14 UTC15m
2026-06-28 CHH7185 - Jun 28, 23:04 UTCJun 28, 23:25 UTC20m
2026-06-28 CHH7338 - Jun 28, 11:45 UTCJun 28, 12:09 UTC25m
2026-06-27 CHH7366 - Jun 27, 10:54 UTCJun 27, 11:09 UTC15m
2026-06-27 CHH7872 - Jun 27, 04:59 UTCJun 27, 05:10 UTC10m
2026-06-26 CHH7337 - Jun 26, 14:19 UTCJun 26, 14:35 UTC15m
2026-06-26 CHH7066 - Jun 26, 06:04 UTCJun 26, 06:25 UTC20m
2026-06-26 CHH7187 - Jun 26, 00:39 UTCJun 26, 00:59 UTC20m
2026-06-25 CHH7809 - Jun 25, 06:44 UTCJun 25, 07:05 UTC20m
2026-06-24 CHH7138 - Jun 24, 23:04 UTCJun 25, 04:14 UTC5h 10m
2026-06-23 CHH7535 PEK → CSX Jun 23, 15:15 UTCJun 24, 01:30 UTC10h 15m
2026-06-23 CHH7143 PEK → KHN Jun 23, 07:09 UTCJun 23, 07:19 UTC10m
2026-06-21 CHH7807 - Jun 21, 04:39 UTCJun 21, 04:54 UTC15m
2026-06-20 CHH7301 SYX → TFU Jun 20, 12:14 UTCJun 20, 12:39 UTC25m
2026-06-20 CHH7302 TFU → SYX Jun 20, 01:39 UTCJun 20, 10:15 UTC8h 35m
2026-06-19 CHH7302 TFU → SYX Jun 19, 12:44 UTCJun 20, 10:15 UTC21h 30m
2026-06-19 CHH7302 TFU → SYX Jun 19, 09:49 UTCJun 20, 04:54 UTC19h 5m
2026-06-19 CHH7302 TFU → SYX Jun 19, 05:30 UTCJun 20, 04:54 UTC23h 25m
2026-06-19 CHH7302 TFU → SYX Jun 19, 01:50 UTCJun 19, 12:59 UTC11h 10m
2026-06-18 CHH7301 SYX → TFU Jun 18, 13:45 UTCJun 19, 12:59 UTC23h 14m
2026-06-18 CHH7386 - Jun 18, 11:25 UTCJun 19, 10:29 UTC23h 4m
2026-06-18 CHH7386 - Jun 18, 10:50 UTCJun 19, 05:30 UTC18h 39m
2026-06-18 CHH7386 - Jun 18, 02:15 UTCJun 18, 14:05 UTC11h 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-1542 page for operator, model, and routing details .

Mode-S 78105D frequently asked

What is Mode-S code 78105D?
78105D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1542.
Where is Mode-S 78105D registered?
Mode-S code 78105D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78105D broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78105D, octal 36010135, decimal 7,868,509.
What flights does 78105D operate?
Mode-S 78105D has broadcast 20 distinct callsigns, including CHH7302, CHH7301, CHH7741, CHH7386, CHH7322.