Apparatus

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sensors Mode-S transponder

78001B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5372 · BOEING 737-800

Hex
78001B
Octal
36000033
Decimal
7,864,347
Country
CN
Tail
B-5372
Type
B738
No current signal · last broadcast 1d ago
Flights observed
52
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 78001B.

Country allocation

The ICAO 24-bit address 78001B 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
CHH7741 Hainan Airlines 5 2026-06-05
CHH7987 Hainan Airlines 2 2026-05-17
CHH7746 - 2 2026-05-25
CHH7736 Hainan Airlines 2 2026-05-28
CHH7557 Hainan Airlines 2 2026-05-30
CHH7290 Hainan Airlines 2 2026-04-26
CHH7275 Hainan Airlines 2 2026-05-28
CHH7988 Hainan Airlines 1 2026-05-17
CHH7811 Hainan Airlines 1 2026-06-04
CHH7776 - 1 2026-05-29
CHH7775 Hainan Airlines 1 2026-05-29
CHH7765 Hainan Airlines 1 2026-05-26
CHH7752 Hainan Airlines 1 2026-05-29
CHH7751 Hainan Airlines 1 2026-05-28
CHH7745 - 1 2026-05-25
CHH7735 Hainan Airlines 1 2026-05-27
CHH7732 Hainan Airlines 1 2026-05-26
CHH7726 Hainan Airlines 1 2026-05-23
CHH7725 Hainan Airlines 1 2026-05-23
CHH7698 Hainan Airlines 1 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-08 CHH7216 NKG → HAK Jun 8, 09:20 UTCJun 8, 09:40 UTC20m
2026-06-05 CHH7249 CAN → TYN Jun 5, 16:55 UTCJun 5, 17:10 UTC15m
2026-06-05 CHH7741 SZX → KWE Jun 5, 04:05 UTCJun 5, 04:15 UTC10m
2026-06-04 CHH7811 PEK → CAN Jun 4, 08:45 UTCJun 4, 09:00 UTC15m
2026-06-04 CHH7167 PEK → CKG Jun 4, 00:05 UTCJun 4, 00:25 UTC20m
2026-06-03 CHH7193 - Jun 3, 12:50 UTCJun 3, 13:05 UTC15m
2026-06-02 CHH7306 TFU → SYX Jun 2, 01:00 UTCJun 2, 07:45 UTC6h 45m
2026-06-01 CHH7330 SHS → SYX Jun 1, 04:15 UTCJun 2, 01:15 UTC21h 0m
2026-05-30 CHH7557 SZX → CKG May 30, 14:30 UTCMay 30, 14:40 UTC10m
2026-05-29 CHH7776 - May 29, 18:20 UTCMay 29, 18:40 UTC20m
2026-05-29 CHH7775 SZX → TYN May 29, 06:40 UTCMay 29, 06:50 UTC10m
2026-05-29 CHH7752 CTU → SZX May 29, 04:55 UTCMay 29, 05:05 UTC10m
2026-05-28 CHH7751 SZX → CTU May 28, 23:10 UTCMay 28, 23:20 UTC10m
2026-05-28 CHH7275 SZX → TFU May 28, 06:25 UTCMay 28, 06:40 UTC15m
2026-05-28 CHH7736 CGO → SZX May 28, 04:45 UTCMay 28, 04:55 UTC10m
2026-05-27 CHH7735 SZX → CGO May 27, 22:30 UTCMay 27, 22:45 UTC15m
2026-05-26 CHH7765 SZX → FUG May 26, 22:50 UTCMay 26, 22:59 UTC10m
2026-05-26 CHH7732 SZX → SYX May 26, 10:20 UTCMay 26, 10:29 UTC10m
2026-05-25 CHH7746 - May 25, 13:50 UTCMay 25, 14:05 UTC15m
2026-05-25 CHH7745 - May 25, 03:00 UTCMay 25, 03:10 UTC10m
2026-05-24 CHH6394 - May 24, 15:15 UTCMay 24, 15:30 UTC15m
2026-05-23 CHH7120 PVG → HAK May 23, 12:10 UTCMay 23, 12:20 UTC10m
2026-05-23 CHH7725 SZX → PVG May 23, 05:55 UTCMay 23, 06:05 UTC10m
2026-05-23 CHH7726 PVG → SZX May 23, 01:15 UTCMay 23, 01:25 UTC10m
2026-05-20 CHH7746 - May 20, 08:55 UTCMay 20, 09:20 UTC25m
2026-05-19 CHH7557 SZX → CKG May 19, 15:15 UTCMay 19, 15:30 UTC15m
2026-05-19 CHH7276 TFU → SZX May 19, 13:00 UTCMay 19, 13:10 UTC10m
2026-05-19 CHH7275 SZX → TFU May 19, 06:30 UTCMay 19, 06:40 UTC10m
2026-05-19 CHH7736 CGO → SZX May 19, 04:55 UTCMay 19, 05:05 UTC10m
2026-05-17 CHH7289 PEK → KWE May 17, 23:35 UTCMay 17, 23:55 UTC20m
2026-05-17 CHH7125 PEK → DOY May 17, 12:20 UTCMay 17, 12:30 UTC10m
2026-05-17 CHH7988 TPE → PEK May 17, 05:20 UTCMay 17, 05:50 UTC30m
2026-05-17 CHH7987 PEK → TPE May 17, 02:20 UTCMay 17, 02:55 UTC35m
2026-05-16 CHH7987 PEK → TPE May 16, 04:05 UTCMay 17, 02:45 UTC22h 40m
2026-05-16 CHH7370 - May 16, 00:55 UTCMay 16, 04:25 UTC3h 30m
2026-05-13 - - May 13, 15:00 UTCMay 13, 15:15 UTC15m
2026-05-13 CHH7741 SZX → KWE May 13, 04:15 UTCMay 13, 04:30 UTC15m
2026-05-13 - - May 13, 02:30 UTCMay 13, 02:40 UTC10m
2026-05-10 CHH7698 NKG → SYX May 10, 04:50 UTCMay 10, 05:10 UTC20m
2026-05-07 CHH7045 ZUH → TYN May 7, 05:20 UTCMay 7, 05:30 UTC10m
2026-05-06 CHH7741 SZX → KWE May 6, 04:05 UTCMay 6, 04:15 UTC10m
2026-05-05 CHH7741 SZX → KWE May 5, 04:00 UTCMay 5, 04:10 UTC10m
2026-05-02 CHH7247 PEK → TFU May 2, 05:00 UTCMay 2, 05:20 UTC20m
2026-04-30 CHH7011 HAK → CAN Apr 30, 15:20 UTCApr 30, 15:35 UTC15m
2026-04-27 CHH7567 PEK → CKG Apr 27, 11:10 UTCApr 27, 11:30 UTC20m
2026-04-27 CHH7147 PEK → TFU Apr 27, 00:25 UTCApr 27, 00:35 UTC10m
2026-04-26 CHH7290 KWE → PEK Apr 26, 14:35 UTCApr 26, 14:45 UTC10m
2026-04-25 CHH7741 SZX → KWE Apr 25, 04:00 UTCApr 25, 04:10 UTC10m
2026-04-22 CHH7038 - Apr 22, 14:20 UTCApr 22, 14:40 UTC20m
2026-04-22 CHH7164 NKG → SZX Apr 22, 05:05 UTCApr 22, 05:30 UTC25m

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-5372 page for operator, model, and routing details .

Mode-S 78001B frequently asked

What is Mode-S code 78001B?
78001B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5372.
Where is Mode-S 78001B registered?
Mode-S code 78001B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78001B broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78001B, octal 36000033, decimal 7,864,347.
What flights does 78001B operate?
Mode-S 78001B has broadcast 20 distinct callsigns, including CHH7741, CHH7987, CHH7746, CHH7736, CHH7557.