Apparatus

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sensors Mode-S transponder

78129D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1346 · BOEING 737-800

Hex
78129D
Octal
36011235
Decimal
7,869,085
Country
CN
Tail
B-1346
Type
B738
No current signal · last broadcast 2d ago
Flights observed
60
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 78129D.

Country allocation

The ICAO 24-bit address 78129D 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
CHH7698 Hainan Airlines 3 2026-05-30
CHH7334 Hainan Airlines 3 2026-04-30
CHH7987 Hainan Airlines 2 2026-05-06
CHH7741 Hainan Airlines 2 2026-05-27
CHH7730 Hainan Airlines 2 2026-05-26
CHH7668 Hainan Airlines 2 2026-05-02
CHH7384 Hainan Airlines 2 2026-05-01
CHH7320 Hainan Airlines 2 2026-05-14
CHH7316 Hainan Airlines 2 2026-04-28
CHH7306 Hainan Airlines 2 2026-04-24
CHH7216 Hainan Airlines 2 2026-05-13
CHH720 Hainan Airlines 2 2026-05-15
CHH719 Hainan Airlines 2 2026-05-15
CHH7164 Hainan Airlines 2 2026-05-18
CHH7988 Hainan Airlines 1 2026-05-06
CHH7776 - 1 2026-05-24
CHH7775 Hainan Airlines 1 2026-05-24
CHH7773 Hainan Airlines 1 2026-05-25
CHH7772 - 1 2026-05-21
CHH7771 - 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 CHH7725 SZX → PVG Jun 1, 04:50 UTCJun 1, 05:00 UTC10m
2026-06-01 CHH7742 KWE → SZX Jun 1, 01:55 UTCJun 1, 02:10 UTC15m
2026-05-30 CHH7698 NKG → SYX May 30, 04:50 UTCMay 30, 09:15 UTC4h 25m
2026-05-29 CHH7698 NKG → SYX May 29, 09:00 UTCMay 30, 05:05 UTC20h 5m
2026-05-29 CHH7698 NKG → SYX May 29, 05:25 UTCMay 30, 05:05 UTC23h 40m
2026-05-27 CHH7741 SZX → KWE May 27, 03:59 UTCMay 27, 04:09 UTC10m
2026-05-26 CHH7730 RIZ → SZX May 26, 16:40 UTCMay 26, 16:50 UTC10m
2026-05-26 CHH7729 SZX → SHE May 26, 05:59 UTCMay 26, 06:10 UTC10m
2026-05-25 CHH7773 SZX → KWE May 25, 13:30 UTCMay 25, 13:40 UTC10m
2026-05-25 CHH7732 SZX → SYX May 25, 10:05 UTCMay 25, 10:20 UTC15m
2026-05-24 CHH7776 - May 24, 18:00 UTCMay 24, 18:10 UTC10m
2026-05-24 CHH7775 SZX → TYN May 24, 05:30 UTCMay 24, 05:45 UTC15m
2026-05-22 CHH7275 SZX → TFU May 22, 07:05 UTCMay 22, 07:15 UTC10m
2026-05-22 CHH7736 CGO → SZX May 22, 05:35 UTCMay 22, 05:50 UTC15m
2026-05-21 CHH7735 SZX → CGO May 21, 22:20 UTCMay 21, 22:35 UTC15m
2026-05-21 CHH7772 - May 21, 13:30 UTCMay 21, 13:45 UTC15m
2026-05-21 CHH7771 - May 21, 08:05 UTCMay 21, 08:45 UTC40m
2026-05-19 CHH7765 SZX → FUG May 19, 23:15 UTCMay 19, 23:25 UTC10m
2026-05-19 CHH7730 RIZ → SZX May 19, 16:25 UTCMay 19, 16:40 UTC15m
2026-05-18 CHH7163 - May 18, 08:20 UTCMay 18, 08:35 UTC15m
2026-05-18 CHH7164 NKG → SZX May 18, 05:15 UTCMay 18, 05:35 UTC20m
2026-05-18 CHH7291 - May 18, 00:50 UTCMay 18, 01:00 UTC10m
2026-05-17 CHH7164 NKG → SZX May 17, 05:05 UTCMay 17, 09:40 UTC4h 35m
2026-05-15 CHH720 HKG → HAK May 15, 09:40 UTCMay 15, 10:10 UTC30m
2026-05-15 CHH719 HAK → HKG May 15, 06:35 UTCMay 15, 06:40 UTC5m
2026-05-14 CHH7319 HAK → PVG May 14, 12:45 UTCMay 15, 03:30 UTC14h 45m
2026-05-14 CHH7320 PVG → HAK May 14, 02:25 UTCMay 14, 13:01 UTC10h 35m
2026-05-13 CHH7216 NKG → HAK May 13, 09:15 UTCMay 14, 02:40 UTC17h 25m
2026-05-13 CHH7216 NKG → HAK May 13, 04:30 UTCMay 14, 02:40 UTC22h 10m
2026-05-11 CHH7078 KHN → HAK May 11, 06:30 UTCMay 11, 12:40 UTC6h 10m
2026-05-11 CHH7370 - May 11, 00:30 UTCMay 11, 03:55 UTC3h 25m
2026-05-08 CHH7482 PEK → HAK May 8, 01:14 UTCMay 8, 01:40 UTC25m
2026-05-06 CHH7289 PEK → KWE May 6, 23:45 UTCMay 7, 00:10 UTC25m
2026-05-06 CHH7125 PEK → DOY May 6, 15:50 UTCMay 6, 16:00 UTC10m
2026-05-06 CHH7988 TPE → PEK May 6, 05:10 UTCMay 6, 05:50 UTC40m
2026-05-06 CHH7987 PEK → TPE May 6, 02:01 UTCMay 6, 02:40 UTC40m
2026-05-05 CHH7987 PEK → TPE May 5, 23:50 UTCMay 6, 00:01 UTC10m
2026-05-05 CHH7298 TYN → CAN May 5, 13:40 UTCMay 5, 13:55 UTC15m
2026-05-04 CHH460 SIN → HAK May 4, 09:05 UTCMay 4, 09:20 UTC15m
2026-05-03 CHH7297 CAN → TYN May 3, 12:55 UTCMay 4, 06:25 UTC17h 30m
2026-05-03 CHH7185 PEK → YIH May 3, 06:10 UTCMay 3, 06:30 UTC20m
2026-05-02 CHH7668 NGB → SZX May 2, 09:05 UTCMay 2, 09:35 UTC30m
2026-05-01 CHH7668 NGB → SZX May 1, 14:35 UTCMay 2, 09:35 UTC19h 0m
2026-05-01 CHH7384 HGH → SYX May 1, 09:45 UTCMay 2, 09:15 UTC23h 30m
2026-04-30 CHH7334 TNA → SYX Apr 30, 14:55 UTCMay 1, 09:55 UTC19h 0m
2026-04-30 CHH7334 TNA → SYX Apr 30, 09:00 UTCApr 30, 15:10 UTC6h 10m
2026-04-29 CHH7334 TNA → SYX Apr 29, 15:30 UTCApr 30, 15:10 UTC23h 40m
2026-04-29 CHH7384 HGH → SYX Apr 29, 10:50 UTCApr 30, 09:05 UTC22h 14m
2026-04-28 CHH7316 KHN → SYX Apr 28, 01:20 UTCApr 28, 04:40 UTC3h 20m
2026-04-24 CHH7306 TFU → SYX Apr 24, 15:30 UTCApr 25, 07:05 UTC15h 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-1346 page for operator, model, and routing details .

Mode-S 78129D frequently asked

What is Mode-S code 78129D?
78129D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1346.
Where is Mode-S 78129D registered?
Mode-S code 78129D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78129D broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78129D, octal 36011235, decimal 7,869,085.
What flights does 78129D operate?
Mode-S 78129D has broadcast 20 distinct callsigns, including CHH7698, CHH7334, CHH7987, CHH7741, CHH7730.