Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78241B

ICAO 24-bit transponder address · allocated to China

Hex
78241B
Octal
36022033
Decimal
7,873,563
Country
CN
No current signal · last broadcast 25d ago
Flights observed
44
Distinct callsigns
17
Country
CN
Last broadcast
25d ago

Last known position

Most recent position reported by Mode-S 78241B.

Country allocation

The ICAO 24-bit address 78241B 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 17 distinct

Callsign Airline Flights Last seen
CES6279 - 7 2026-07-15
CES6280 - 6 2026-07-15
CES5072 China Eastern Airlines 5 2026-07-25
CES5071 China Eastern Airlines 5 2026-07-25
CES6422 China Eastern Airlines 4 2026-07-24
CES6421 - 3 2026-07-21
CES5211 China Eastern Airlines 3 2026-07-22
CES6399 - 2 2026-07-06
CES6134 China Eastern Airlines 1 2026-07-26
CES5392 - 1 2026-07-09
CES5391 - 1 2026-07-09
CES5359 - 1 2026-07-08
CES5352 - 1 2026-07-02
CES5343 - 1 2026-07-02
CES5332 - 1 2026-07-08
CES5158 - 1 2026-07-07
CES5000 - 1 2026-06-27

Recent flights last 44

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES6134 BPL → PVG Jul 26, 03:55 UTCJul 26, 04:30 UTC35m
2026-07-25 CES5072 ICN → HGH Jul 25, 03:35 UTCJul 25, 04:00 UTC25m
2026-07-25 CES5071 HGH → ICN Jul 25, 01:25 UTCJul 25, 02:10 UTC45m
2026-07-24 CES6422 SZX → HGH Jul 24, 12:30 UTCJul 24, 12:45 UTC15m
2026-07-24 CES5072 ICN → HGH Jul 24, 03:10 UTCJul 24, 09:55 UTC6h 45m
2026-07-24 CES5071 HGH → ICN Jul 24, 01:05 UTCJul 24, 01:45 UTC40m
2026-07-23 CES5072 ICN → HGH Jul 23, 03:15 UTCJul 24, 01:45 UTC22h 30m
2026-07-23 CES5071 HGH → ICN Jul 23, 01:10 UTCJul 23, 01:50 UTC40m
2026-07-22 CES5211 HGH → CAN Jul 22, 01:55 UTCJul 22, 02:05 UTC10m
2026-07-21 CES6422 SZX → HGH Jul 21, 15:10 UTCJul 21, 15:25 UTC15m
2026-07-21 CES6421 - Jul 21, 12:55 UTCJul 21, 13:50 UTC55m
2026-07-21 CES5211 HGH → CAN Jul 21, 06:20 UTCJul 21, 06:40 UTC20m
2026-07-20 CES6422 SZX → HGH Jul 20, 13:40 UTCJul 20, 13:50 UTC10m
2026-07-20 CES6421 - Jul 20, 11:50 UTCJul 20, 12:10 UTC20m
2026-07-19 CES6422 - Jul 19, 14:20 UTCJul 19, 14:30 UTC10m
2026-07-19 CES6421 - Jul 19, 10:25 UTCJul 19, 11:50 UTC1h 25m
2026-07-19 CES5211 - Jul 19, 01:50 UTCJul 19, 02:05 UTC15m
2026-07-18 CES5072 - Jul 18, 03:25 UTCJul 18, 04:00 UTC35m
2026-07-18 CES5071 HGH → ICN Jul 18, 01:20 UTCJul 18, 02:00 UTC40m
2026-07-17 CES5072 ICN → ICN Jul 17, 03:34 UTCJul 18, 02:00 UTC22h 25m
2026-07-17 CES5071 HGH → ICN Jul 17, 01:35 UTCJul 17, 02:20 UTC45m
2026-07-15 CES6280 - Jul 15, 12:05 UTCJul 15, 12:20 UTC15m
2026-07-15 CES6279 - Jul 15, 09:35 UTCJul 15, 10:00 UTC25m
2026-07-14 CES6280 - Jul 14, 13:35 UTCJul 14, 13:50 UTC15m
2026-07-14 CES6279 - Jul 14, 11:20 UTCJul 14, 11:50 UTC30m
2026-07-13 CES6280 - Jul 13, 11:55 UTCJul 13, 12:15 UTC20m
2026-07-13 CES6279 - Jul 13, 09:50 UTCJul 13, 10:15 UTC25m
2026-07-12 CES6280 - Jul 12, 12:01 UTCJul 12, 12:10 UTC10m
2026-07-12 CES6279 - Jul 12, 09:45 UTCJul 12, 10:05 UTC20m
2026-07-11 CES6280 - Jul 11, 14:05 UTCJul 11, 14:25 UTC20m
2026-07-11 CES6279 - Jul 11, 11:45 UTCJul 11, 12:05 UTC20m
2026-07-11 CES6279 - Jul 11, 09:20 UTCJul 11, 09:35 UTC15m
2026-07-10 CES6280 - Jul 10, 13:10 UTCJul 10, 13:20 UTC10m
2026-07-10 CES6279 - Jul 10, 11:15 UTCJul 10, 11:40 UTC25m
2026-07-09 CES5392 - Jul 9, 09:35 UTCJul 9, 09:55 UTC20m
2026-07-09 CES5391 - Jul 9, 01:00 UTCJul 9, 08:15 UTC7h 15m
2026-07-08 CES5332 - Jul 8, 23:50 UTCJul 9, 00:00 UTC10m
2026-07-08 CES5359 - Jul 8, 10:15 UTCJul 8, 16:05 UTC5h 50m
2026-07-07 CES5158 - Jul 7, 11:25 UTCJul 8, 10:15 UTC22h 50m
2026-07-06 CES6399 - Jul 6, 09:20 UTCJul 6, 13:00 UTC3h 40m
2026-07-05 CES6399 - Jul 5, 14:30 UTCJul 6, 12:45 UTC22h 15m
2026-07-02 CES5352 - Jul 2, 12:35 UTCJul 2, 12:45 UTC10m
2026-07-02 CES5343 - Jul 2, 10:10 UTCJul 2, 10:35 UTC25m
2026-06-27 CES5000 - Jun 27, 08:49 UTCJun 27, 21:34 UTC12h 45m

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.

Mode-S 78241B frequently asked

What is Mode-S code 78241B?
78241B is an ICAO 24-bit transponder address. Allocated to China.
Where is Mode-S 78241B registered?
Mode-S code 78241B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78241B broadcasting right now?
No active broadcast right now. Last signal was 25d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78241B, octal 36022033, decimal 7,873,563.
What flights does 78241B operate?
Mode-S 78241B has broadcast 17 distinct callsigns, including CES6279, CES6280, CES5072, CES5071, CES6422.