sensors Mode-S transponder

78129C

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1347 · BOEING 737-800

Hex
78129C
Octal
36011234
Decimal
7,869,084
Country
CN
Tail
B-1347
Type
B738
No current signal · last broadcast 7m ago
Flights observed
52
Distinct callsigns
20
Country
CN
Last broadcast
7m ago

Last known position

Most recent position reported by Mode-S 78129C.

Country allocation

The ICAO 24-bit address 78129C 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
CHH7191 Hainan Airlines 6 2026-04-26
CHH7056 Hainan Airlines 6 2026-05-14
CHH7052 Hainan Airlines 6 2026-05-14
CHH7054 Hainan Airlines 5 2026-05-09
CHH7212 Hainan Airlines 4 2026-04-29
CHH7211 Hainan Airlines 4 2026-04-28
CHH7492 Hainan Airlines 2 2026-04-26
CHH7295 Hainan Airlines 2 2026-05-28
CHH7055 Hainan Airlines 2 2026-05-17
CHH7726 Hainan Airlines 1 2026-06-04
CHH7725 Hainan Airlines 1 2026-06-04
CHH7672 - 1 2026-05-20
CHH7671 - 1 2026-05-20
CHH7512 Hainan Airlines 1 2026-05-22
CHH7491 Hainan Airlines 1 2026-04-24
CHH7488 Hainan Airlines 1 2026-05-03
CHH7268 - 1 2026-04-20
CHH7267 Hainan Airlines 1 2026-04-20
CHH7238 Hainan Airlines 1 2026-05-27
CHH7237 Hainan Airlines 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-04 CHH7725 SZX → PVG Jun 4, 04:50 UTCJun 4, 05:00 UTC10m
2026-06-04 CHH7726 PVG → SZX Jun 4, 00:50 UTCJun 4, 01:05 UTC15m
2026-05-29 CHH7237 PEK → XIY May 29, 03:15 UTCMay 29, 03:30 UTC15m
2026-05-28 CHH7295 PEK → FOC May 28, 09:35 UTCMay 28, 09:45 UTC10m
2026-05-27 CHH7193 - May 27, 12:15 UTCMay 27, 12:30 UTC15m
2026-05-27 CHH7238 XIY → PEK May 27, 07:35 UTCMay 27, 08:10 UTC35m
2026-05-22 CHH7512 ZUH → XIY May 22, 04:00 UTCMay 22, 04:10 UTC10m
2026-05-20 CHH7672 - May 20, 14:55 UTCMay 20, 15:20 UTC25m
2026-05-20 CHH7671 - May 20, 07:30 UTCMay 20, 08:00 UTC30m
2026-05-17 CHH7055 HAK → HGH May 17, 00:30 UTCMay 17, 14:01 UTC13h 30m
2026-05-14 CHH7056 HGH → HAK May 14, 14:20 UTCMay 15, 06:50 UTC16h 30m
2026-05-14 CHH7055 HAK → HGH May 14, 09:35 UTCMay 15, 06:50 UTC21h 15m
2026-05-14 CHH7052 HGH → HAK May 14, 06:10 UTCMay 15, 01:50 UTC19h 40m
2026-05-13 CHH7052 HGH → HAK May 13, 13:31 UTCMay 14, 09:50 UTC20h 20m
2026-05-13 CHH7052 HGH → HAK May 13, 09:05 UTCMay 14, 06:35 UTC21h 30m
2026-05-13 CHH7056 HGH → HAK May 13, 01:20 UTCMay 13, 13:50 UTC12h 30m
2026-05-12 CHH7056 HGH → HAK May 12, 13:25 UTCMay 13, 09:15 UTC19h 50m
2026-05-12 CHH7056 HGH → HAK May 12, 08:35 UTCMay 13, 06:15 UTC21h 40m
2026-05-12 CHH7052 HGH → HAK May 12, 05:40 UTCMay 13, 01:25 UTC19h 45m
2026-05-10 CHH7052 HGH → HAK May 10, 01:09 UTCMay 10, 13:40 UTC12h 30m
2026-05-09 CHH7052 HGH → HAK May 9, 13:25 UTCMay 10, 09:45 UTC20h 20m
2026-05-09 CHH7056 HGH → HAK May 9, 06:05 UTCMay 10, 01:14 UTC19h 10m
2026-05-09 CHH7056 HGH → HAK May 9, 03:05 UTCMay 10, 01:14 UTC22h 10m
2026-05-09 CHH7054 HGH → HAK May 9, 02:40 UTCMay 9, 13:50 UTC11h 10m
2026-05-08 CHH7054 HGH → HAK May 8, 06:14 UTCMay 9, 03:10 UTC20h 55m
2026-05-08 CHH7054 HGH → HAK May 8, 03:04 UTCMay 9, 03:00 UTC23h 55m
2026-05-06 CHH7054 HGH → HAK May 6, 12:45 UTCMay 7, 03:00 UTC14h 14m
2026-05-04 CHH7054 HGH → HAK May 4, 12:40 UTCMay 5, 06:00 UTC17h 21m
2026-05-03 CHH7488 CGQ → HGH May 3, 13:05 UTCMay 4, 12:40 UTC23h 35m
2026-04-29 CHH7153 CAN → URC Apr 29, 10:10 UTCApr 29, 10:30 UTC20m
2026-04-29 CHH7212 KMG → PEK Apr 29, 07:24 UTCApr 29, 07:50 UTC25m
2026-04-28 CHH7211 PEK → KMG Apr 28, 23:50 UTCApr 29, 00:10 UTC20m
2026-04-28 CHH7212 KMG → PEK Apr 28, 07:40 UTCApr 28, 08:00 UTC20m
2026-04-27 CHH7211 PEK → KMG Apr 27, 23:40 UTCApr 28, 00:10 UTC30m
2026-04-27 CHH7212 KMG → PEK Apr 27, 07:30 UTCApr 27, 07:40 UTC10m
2026-04-26 CHH7211 PEK → KMG Apr 26, 23:55 UTCApr 27, 00:10 UTC15m
2026-04-26 CHH7492 XMN → PEK Apr 26, 15:35 UTCApr 26, 15:45 UTC10m
2026-04-26 CHH7191 PEK → XMN Apr 26, 00:15 UTCApr 26, 00:25 UTC10m
2026-04-25 CHH7134 - Apr 25, 16:20 UTCApr 25, 16:35 UTC15m
2026-04-24 CHH7491 PEK → XMN Apr 24, 08:50 UTCApr 24, 09:05 UTC15m
2026-04-24 CHH7191 PEK → XMN Apr 24, 00:20 UTCApr 24, 00:30 UTC10m
2026-04-23 CHH7492 XMN → PEK Apr 23, 15:45 UTCApr 23, 15:55 UTC10m
2026-04-23 CHH7191 PEK → XMN Apr 23, 00:10 UTCApr 23, 00:20 UTC10m
2026-04-22 CHH7191 PEK → XMN Apr 22, 00:15 UTCApr 22, 00:25 UTC10m
2026-04-21 CHH7191 PEK → XMN Apr 21, 00:10 UTCApr 21, 00:25 UTC15m
2026-04-20 CHH7268 - Apr 20, 15:25 UTCApr 20, 15:35 UTC10m
2026-04-20 CHH7267 PEK → CKG Apr 20, 09:45 UTCApr 20, 10:05 UTC20m
2026-04-20 CHH7191 PEK → XMN Apr 20, 00:10 UTCApr 20, 00:20 UTC10m
2026-04-19 CHH7295 PEK → FOC Apr 19, 09:25 UTCApr 19, 09:35 UTC10m
2026-04-19 CHH7212 KMG → PEK Apr 19, 07:10 UTCApr 19, 07:30 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-1347 page for operator, model, and routing details .

Mode-S 78129C frequently asked

What is Mode-S code 78129C?
78129C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1347.
Where is Mode-S 78129C registered?
Mode-S code 78129C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78129C broadcasting right now?
No active broadcast right now. Last signal was 7m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78129C, octal 36011234, decimal 7,869,084.
What flights does 78129C operate?
Mode-S 78129C has broadcast 20 distinct callsigns, including CHH7191, CHH7056, CHH7052, CHH7054, CHH7212.