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
Broadcasting now · callsign CHH7628 · 27,625 ft
Flights observed
116
Distinct callsigns
20
Country
CN
Last broadcast
12h ago

Current position

78001B is currently broadcasting. Map zoomed to live position.

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 - 6 2026-07-16
CHH7987 - 3 2026-06-21
CHH7601 - 3 2026-07-08
CHH7247 - 3 2026-06-29
CHH7988 - 2 2026-06-22
CHH7811 - 2 2026-06-26
CHH7746 - 2 2026-05-25
CHH7736 Hainan Airlines 2 2026-05-28
CHH7654 - 2 2026-07-14
CHH7557 Hainan Airlines 2 2026-05-30
CHH7547 - 2 2026-06-27
CHH7386 - 2 2026-06-28
CHH7319 - 2 2026-07-10
CHH7290 Hainan Airlines 2 2026-04-26
CHH7289 Hainan Airlines 2 2026-07-06
CHH7275 Hainan Airlines 2 2026-05-28
CHH720 - 2 2026-07-13
CHH7193 - 2 2026-06-24
CHH719 - 2 2026-07-13
CHH7164 - 2 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 CHH6359 PEK → HRB Jul 23, 23:20 UTCJul 23, 23:30 UTC10m
2026-07-23 CHH7236 - Jul 23, 09:25 UTCJul 23, 09:35 UTC10m
2026-07-23 CHH7235 CAN → CGO Jul 23, 03:15 UTCJul 23, 03:35 UTC20m
2026-07-22 CHH7015 HAK → SZX Jul 22, 01:10 UTCJul 22, 12:35 UTC11h 25m
2026-07-18 CHH7282 - Jul 18, 13:30 UTCJul 18, 13:50 UTC20m
2026-07-18 CHH7803 - Jul 18, 01:50 UTCJul 18, 02:09 UTC20m
2026-07-17 CHH7810 - Jul 17, 09:50 UTCJul 17, 10:05 UTC15m
2026-07-16 CHH7741 - Jul 16, 03:05 UTCJul 16, 03:15 UTC10m
2026-07-16 CHH7742 - Jul 16, 01:35 UTCJul 16, 01:50 UTC15m
2026-07-15 CHH748 - Jul 15, 04:05 UTCJul 15, 04:35 UTC30m
2026-07-15 CHH747 - Jul 15, 02:20 UTCJul 15, 02:30 UTC10m
2026-07-14 CHH7654 - Jul 14, 12:35 UTCJul 14, 15:30 UTC2h 55m
2026-07-13 CHH720 - Jul 13, 08:15 UTCJul 13, 08:30 UTC15m
2026-07-13 CHH719 - Jul 13, 06:25 UTCJul 13, 06:45 UTC20m
2026-07-13 CHH706 - Jul 13, 02:35 UTCJul 13, 02:50 UTC15m
2026-07-13 CHH705 - Jul 13, 00:35 UTCJul 13, 00:40 UTC5m
2026-07-12 CHH7648 - Jul 12, 07:50 UTCJul 12, 11:30 UTC3h 40m
2026-07-11 CHH720 - Jul 11, 08:15 UTCJul 11, 08:30 UTC15m
2026-07-11 CHH719 - Jul 11, 06:20 UTCJul 11, 06:35 UTC15m
2026-07-10 CHH7319 - Jul 10, 09:10 UTCJul 11, 03:10 UTC18h 0m
2026-07-10 CHH7319 - Jul 10, 04:55 UTCJul 11, 03:10 UTC22h 15m
2026-07-09 CHH7164 - Jul 9, 04:45 UTCJul 9, 05:25 UTC40m
2026-07-09 CHH7291 - Jul 9, 00:15 UTCJul 9, 00:25 UTC10m
2026-07-08 CHH7716 - Jul 8, 12:25 UTCJul 8, 12:35 UTC10m
2026-07-08 - - Jul 8, 10:45 UTCJul 8, 10:55 UTC10m
2026-07-08 CHH7709 - Jul 8, 07:50 UTCJul 8, 08:10 UTC20m
2026-07-08 CHH7601 - Jul 8, 00:00 UTCJul 8, 00:15 UTC15m
2026-07-07 CHH7188 - Jul 7, 16:00 UTCJul 7, 16:25 UTC25m
2026-07-06 CHH7289 PEK → KWE Jul 6, 23:40 UTCJul 7, 08:25 UTC8h 45m
2026-07-06 CHH7710 - Jul 6, 11:35 UTCJul 6, 11:45 UTC10m
2026-07-06 CHH7156 - Jul 6, 09:35 UTCJul 6, 09:45 UTC10m
2026-07-06 CHH7155 - Jul 6, 04:05 UTCJul 6, 04:15 UTC10m
2026-07-05 CHH7397 - Jul 5, 15:35 UTCJul 5, 15:45 UTC10m
2026-07-05 CHH7772 - Jul 5, 13:10 UTCJul 5, 13:25 UTC15m
2026-07-05 CHH7771 - Jul 5, 09:20 UTCJul 5, 09:30 UTC10m
2026-07-02 CHH7103 - Jul 2, 15:50 UTCJul 2, 16:00 UTC10m
2026-06-29 CHH7247 - Jun 29, 05:30 UTCJun 29, 05:50 UTC20m
2026-06-28 CHH7301 SYX → TFU Jun 28, 13:19 UTCJun 28, 13:34 UTC15m
2026-06-28 CHH7386 - Jun 28, 01:50 UTCJun 28, 11:14 UTC9h 25m
2026-06-27 CHH7386 - Jun 27, 12:55 UTCJun 28, 11:14 UTC22h 20m
2026-06-27 CHH7547 - Jun 27, 12:25 UTCJun 28, 10:30 UTC22h 5m
2026-06-27 CHH440 - Jun 27, 06:05 UTCJun 27, 08:10 UTC2h 5m
2026-06-27 CHH439 - Jun 27, 01:00 UTCJun 27, 03:09 UTC2h 10m
2026-06-26 CHH439 - Jun 26, 23:55 UTCJun 27, 00:10 UTC15m
2026-06-26 CHH7811 - Jun 26, 09:00 UTCJun 26, 09:14 UTC15m
2026-06-26 CHH7147 - Jun 26, 00:05 UTCJun 26, 00:24 UTC20m
2026-06-25 CHH6218 XIY → PEK Jun 25, 12:40 UTCJun 25, 13:09 UTC30m
2026-06-25 CHH6217 PEK → XIY Jun 25, 07:39 UTCJun 25, 07:59 UTC20m
2026-06-24 CHH7601 - Jun 24, 23:59 UTCJun 25, 00:09 UTC10m
2026-06-24 CHH7193 - Jun 24, 12:34 UTCJun 24, 12:50 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-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?
Yes. Mode-S 78001B is currently airborne.
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, CHH7601, CHH7247, CHH7988.