Apparatus

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sensors Mode-S transponder

78129F

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1342 · BOEING 787-9 Dreamliner

Hex
78129F
Octal
36011237
Decimal
7,869,087
Country
CN
Tail
B-1342
Type
B789
No current signal · last broadcast 18h ago
Flights observed
142
Distinct callsigns
20
Country
CN
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S 78129F.

Country allocation

The ICAO 24-bit address 78129F 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
CHH7922 Hainan Airlines 9 2026-05-21
CHH7921 Hainan Airlines 7 2026-05-20
CHH7708 - 7 2026-07-16
CHH7703 - 5 2026-07-16
CHH490 - 4 2026-07-08
CHH489 - 4 2026-07-08
CHH437 Hainan Airlines 4 2026-06-20
CHH7713 - 3 2026-07-16
CHH7711 Hainan Airlines 3 2026-06-15
CHH761 - 3 2026-06-25
CHH7396 Hainan Airlines 3 2026-06-05
CHH7357 - 3 2026-07-03
CHH730 Hainan Airlines 3 2026-05-09
CHH7025 - 3 2026-07-14
CHH492 - 3 2026-06-19
CHH491 - 3 2026-06-18
CHH438 - 3 2026-06-21
CHH408 - 3 2026-07-15
CHH407 - 3 2026-07-14
CHH7932 Hainan Airlines 2 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 CHH7834 - Jul 19, 11:30 UTCJul 19, 11:50 UTC20m
2026-07-19 CHH7833 - Jul 19, 08:40 UTCJul 19, 09:05 UTC25m
2026-07-16 CHH7713 - Jul 16, 16:00 UTCJul 16, 16:09 UTC10m
2026-07-16 CHH7713 - Jul 16, 13:40 UTCJul 16, 13:54 UTC15m
2026-07-16 CHH7708 - Jul 16, 10:50 UTCJul 16, 10:59 UTC10m
2026-07-16 CHH7708 - Jul 16, 08:25 UTCJul 16, 08:35 UTC10m
2026-07-16 CHH7703 - Jul 16, 02:40 UTCJul 16, 03:00 UTC20m
2026-07-15 CHH408 - Jul 15, 11:20 UTCJul 15, 20:15 UTC8h 55m
2026-07-14 CHH407 - Jul 14, 23:15 UTCJul 15, 05:40 UTC6h 25m
2026-07-14 CHH407 - Jul 14, 20:00 UTCJul 14, 20:15 UTC15m
2026-07-14 CHH7714 - Jul 14, 13:20 UTCJul 14, 13:30 UTC10m
2026-07-14 CHH7025 - Jul 14, 11:15 UTCJul 14, 11:25 UTC10m
2026-07-12 CHH7972 - Jul 12, 10:05 UTCJul 12, 14:40 UTC4h 35m
2026-07-11 CHH7971 - Jul 11, 22:25 UTCJul 12, 06:10 UTC7h 45m
2026-07-11 CHH7703 - Jul 11, 04:20 UTCJul 11, 04:30 UTC10m
2026-07-11 CHH7703 - Jul 11, 01:50 UTCJul 11, 02:15 UTC25m
2026-07-10 CHH408 - Jul 10, 19:55 UTCJul 10, 20:15 UTC20m
2026-07-10 CHH408 - Jul 10, 11:20 UTCJul 10, 17:30 UTC6h 10m
2026-07-09 CHH407 - Jul 9, 23:00 UTCJul 10, 05:45 UTC6h 45m
2026-07-09 CHH7025 - Jul 9, 10:55 UTCJul 9, 11:10 UTC15m
2026-07-09 CHH7024 - Jul 9, 06:45 UTCJul 9, 07:00 UTC15m
2026-07-09 CHH7703 - Jul 9, 04:50 UTCJul 9, 05:05 UTC15m
2026-07-09 CHH7703 - Jul 9, 02:30 UTCJul 9, 02:45 UTC15m
2026-07-08 CHH490 - Jul 8, 20:20 UTCJul 8, 20:35 UTC15m
2026-07-08 CHH490 - Jul 8, 12:10 UTCJul 8, 17:55 UTC5h 45m
2026-07-08 CHH489 - Jul 8, 04:30 UTCJul 8, 04:50 UTC20m
2026-07-07 CHH489 - Jul 7, 20:05 UTCJul 8, 02:30 UTC6h 25m
2026-07-07 CHH7607 - Jul 7, 12:25 UTCJul 7, 12:35 UTC10m
2026-07-07 CHH7277 - Jul 7, 01:00 UTCJul 7, 01:10 UTC10m
2026-07-06 CHH7267 - Jul 6, 10:25 UTCJul 6, 10:40 UTC15m
2026-07-06 CHH7147 - Jul 6, 00:05 UTCJul 6, 00:25 UTC20m
2026-07-05 CHH7268 CKG → PEK Jul 5, 16:40 UTCJul 5, 17:00 UTC20m
2026-07-04 CHH470 - Jul 4, 10:55 UTCJul 4, 17:10 UTC6h 15m
2026-07-03 CHH469 - Jul 3, 22:45 UTCJul 4, 06:20 UTC7h 35m
2026-07-03 CHH7357 - Jul 3, 14:25 UTCJul 3, 14:35 UTC10m
2026-07-03 CHH7709 - Jul 3, 12:05 UTCJul 3, 12:30 UTC25m
2026-07-03 CHH7709 - Jul 3, 09:45 UTCJul 3, 09:55 UTC10m
2026-07-02 CHH7704 - Jul 2, 01:20 UTCJul 2, 01:30 UTC10m
2026-07-01 CHH760 - Jul 1, 20:15 UTCJul 1, 20:25 UTC10m
2026-07-01 CHH760 - Jul 1, 09:50 UTCJul 1, 15:50 UTC6h 0m
2026-06-30 CHH759 - Jun 30, 22:55 UTCJul 1, 05:30 UTC6h 35m
2026-06-30 CHH759 - Jun 30, 17:55 UTCJun 30, 18:05 UTC10m
2026-06-30 CHH7025 - Jun 30, 10:25 UTCJun 30, 10:40 UTC15m
2026-06-29 CHH7182 - Jun 29, 05:20 UTCJun 29, 05:40 UTC20m
2026-06-28 CHH490 - Jun 28, 20:19 UTCJun 28, 20:34 UTC15m
2026-06-28 CHH490 - Jun 28, 12:05 UTCJun 28, 17:44 UTC5h 40m
2026-06-28 CHH489 - Jun 28, 03:45 UTCJun 28, 04:05 UTC20m
2026-06-27 CHH489 - Jun 27, 22:09 UTCJun 27, 23:04 UTC55m
2026-06-27 CHH7176 - Jun 27, 05:35 UTCJun 27, 05:44 UTC10m
2026-06-27 CHH7175 - Jun 27, 00:20 UTCJun 27, 00:29 UTC10m

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-1342 page for operator, model, and routing details .

Mode-S 78129F frequently asked

What is Mode-S code 78129F?
78129F is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1342.
Where is Mode-S 78129F registered?
Mode-S code 78129F is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78129F broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78129F, octal 36011237, decimal 7,869,087.
What flights does 78129F operate?
Mode-S 78129F has broadcast 20 distinct callsigns, including CHH7922, CHH7921, CHH7708, CHH7703, CHH490.