Apparatus

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sensors Mode-S transponder

78129E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1345 · BOEING 787-9 Dreamliner

Hex
78129E
Octal
36011236
Decimal
7,869,086
Country
CN
Tail
B-1345
Type
B789
No current signal · last broadcast 50m ago
Flights observed
84
Distinct callsigns
20
Country
CN
Last broadcast
50m ago

Last known position

Most recent position reported by Mode-S 78129E.

Country allocation

The ICAO 24-bit address 78129E 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
CHH785 Hainan Airlines 5 2026-04-18
CHH727 Hainan Airlines 5 2026-05-19
CHH7992 Hainan Airlines 4 2026-05-18
CHH7991 Hainan Airlines 4 2026-05-18
CHH789 Hainan Airlines 4 2026-04-15
CHH786 Hainan Airlines 4 2026-04-19
CHH728 Hainan Airlines 4 2026-05-20
CHH492 Hainan Airlines 4 2026-05-16
CHH446 Hainan Airlines 4 2026-05-29
CHH797 Hainan Airlines 3 2026-05-26
CHH730 Hainan Airlines 3 2026-04-23
CHH491 Hainan Airlines 3 2026-05-15
CHH798 Hainan Airlines 2 2026-05-27
CHH7964 Hainan Airlines 2 2026-05-25
CHH790 Hainan Airlines 2 2026-04-15
CHH7713 Hainan Airlines 2 2026-04-24
CHH7712 Hainan Airlines 2 2026-04-21
CHH7708 Hainan Airlines 2 2026-04-28
CHH7707 Hainan Airlines 2 2026-04-21
CHH762 Hainan Airlines 2 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CHH446 SEA → CKG May 29, 03:35 UTCMay 30, 03:30 UTC23h 55m
2026-05-29 CHH446 SEA → CKG May 29, 03:15 UTCMay 29, 21:15 UTC18h 0m
2026-05-28 CHH446 SEA → CKG May 28, 21:35 UTCMay 29, 21:15 UTC23h 40m
2026-05-28 CHH446 SEA → CKG May 28, 18:20 UTCMay 29, 12:25 UTC18h 5m
2026-05-27 CHH445 CKG → SEA May 27, 23:40 UTCMay 28, 16:05 UTC16h 25m
2026-05-27 CHH445 CKG → SEA May 27, 18:40 UTCMay 28, 16:05 UTC21h 25m
2026-05-27 CHH798 AKL → HAK May 27, 11:50 UTCMay 28, 08:05 UTC20h 15m
2026-05-27 CHH798 AKL → HAK May 27, 09:05 UTCMay 28, 07:30 UTC22h 25m
2026-05-26 CHH797 HAK → SYD May 26, 19:34 UTCMay 27, 05:14 UTC9h 40m
2026-05-26 CHH797 HAK → SYD May 26, 03:05 UTCMay 26, 21:09 UTC18h 5m
2026-05-26 CHH797 HAK → SYD May 26, 01:00 UTCMay 26, 21:09 UTC20h 10m
2026-05-25 CHH7964 CSX → HAK May 25, 21:35 UTCMay 26, 21:09 UTC23h 35m
2026-05-25 CHH7964 CSX → HAK May 25, 21:19 UTCMay 26, 03:30 UTC6h 10m
2026-05-25 CHH7963 CSX → LHR May 25, 11:15 UTCMay 25, 18:15 UTC7h 0m
2026-05-22 CHH428 MXP → CKG May 22, 10:55 UTCMay 22, 14:45 UTC3h 50m
2026-05-21 CHH427 CKG → MXP May 21, 23:05 UTCMay 22, 05:55 UTC6h 50m
2026-05-20 CHH728 MAD → CKG May 20, 09:40 UTCMay 20, 14:30 UTC4h 50m
2026-05-19 CHH727 CKG → MAD May 19, 22:25 UTCMay 20, 06:35 UTC8h 11m
2026-05-18 CHH7992 FCO → CKG May 18, 10:55 UTCMay 18, 14:15 UTC3h 20m
2026-05-18 CHH7991 CKG → FCO May 18, 01:15 UTCMay 18, 05:50 UTC4h 35m
2026-05-16 CHH492 BRU → PEK May 16, 11:41 UTCMay 16, 17:45 UTC6h 5m
2026-05-15 CHH491 PEK → BRU May 15, 22:00 UTCMay 16, 04:30 UTC6h 30m
2026-05-14 CHH492 BRU → PEK May 14, 11:35 UTCMay 14, 17:35 UTC6h 0m
2026-05-13 CHH491 PEK → BRU May 13, 20:45 UTCMay 14, 04:35 UTC7h 50m
2026-05-10 CHH728 MAD → CKG May 10, 09:45 UTCMay 10, 14:20 UTC4h 35m
2026-05-10 CHH727 CKG → MAD May 10, 00:09 UTCMay 10, 07:10 UTC7h 0m
2026-05-08 CHH428 MXP → CKG May 8, 10:59 UTCMay 8, 14:50 UTC3h 50m
2026-05-07 CHH427 CKG → MXP May 7, 23:49 UTCMay 8, 05:14 UTC5h 25m
2026-05-07 CHH7357 SZX → CKG May 7, 12:30 UTCMay 7, 12:40 UTC10m
2026-05-06 CHH728 MAD → CKG May 6, 09:35 UTCMay 6, 14:25 UTC4h 50m
2026-05-05 CHH727 CKG → MAD May 5, 13:45 UTCMay 6, 07:30 UTC17h 45m
2026-05-05 CHH7179 PEK → SYX May 5, 01:45 UTCMay 5, 02:01 UTC15m
2026-05-04 CHH492 BRU → PEK May 4, 20:05 UTCMay 4, 20:20 UTC15m
2026-05-04 CHH492 BRU → PEK May 4, 11:50 UTCMay 4, 17:45 UTC5h 55m
2026-05-03 CHH491 PEK → BRU May 3, 19:20 UTCMay 4, 05:35 UTC10h 15m
2026-04-30 CHH728 MAD → CKG Apr 30, 09:45 UTCApr 30, 14:25 UTC4h 40m
2026-04-30 CHH727 CKG → MAD Apr 30, 00:05 UTCApr 30, 06:30 UTC6h 25m
2026-04-29 CHH727 CKG → MAD Apr 29, 09:45 UTCApr 30, 06:30 UTC20h 44m
2026-04-28 CHH7708 SZX → PEK Apr 28, 08:25 UTCApr 28, 08:35 UTC10m
2026-04-27 CHH762 BUD → SZX Apr 27, 20:30 UTCApr 27, 20:40 UTC10m
2026-04-27 CHH762 BUD → SZX Apr 27, 10:20 UTCApr 27, 13:20 UTC3h 0m
2026-04-27 CHH761 SZX → BUD Apr 27, 01:40 UTCApr 27, 05:05 UTC3h 25m
2026-04-26 CHH761 SZX → BUD Apr 26, 18:05 UTCApr 26, 18:15 UTC10m
2026-04-26 CHH7394 HGH → SZX Apr 26, 06:20 UTCApr 26, 06:40 UTC20m
2026-04-25 CHH7974 LAX → PVG Apr 25, 10:30 UTCApr 25, 14:15 UTC3h 45m
2026-04-25 CHH7973 PEK → KJA Apr 25, 05:00 UTCApr 25, 08:15 UTC3h 15m
2026-04-24 CHH7713 PEK → SZX Apr 24, 17:05 UTCApr 24, 17:20 UTC15m
2026-04-24 CHH7713 PEK → SZX Apr 24, 14:30 UTCApr 24, 14:55 UTC25m
2026-04-24 CHH7708 SZX → PEK Apr 24, 09:45 UTCApr 24, 09:55 UTC10m
2026-04-24 CHH7703 PEK → SZX Apr 24, 01:55 UTCApr 24, 02:10 UTC15m

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-1345 page for operator, model, and routing details .

Mode-S 78129E frequently asked

What is Mode-S code 78129E?
78129E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1345.
Where is Mode-S 78129E registered?
Mode-S code 78129E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78129E broadcasting right now?
No active broadcast right now. Last signal was 50m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78129E, octal 36011236, decimal 7,869,086.
What flights does 78129E operate?
Mode-S 78129E has broadcast 20 distinct callsigns, including CHH785, CHH727, CHH7992, CHH7991, CHH789.