sensors Mode-S transponder

78102A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1550 · BOEING 737-800

Hex
78102A
Octal
36010052
Decimal
7,868,458
Country
CN
Tail
B-1550
Type
B738
No current signal · last broadcast 8h ago
Flights observed
60
Distinct callsigns
20
Country
CN
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 78102A.

Country allocation

The ICAO 24-bit address 78102A 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
CXA8781 - 8 2026-07-14
CXA8321 Xiamen Airlines 4 2026-05-21
CXA8222 - 3 2026-06-20
CXA8221 - 3 2026-06-20
CXA8827 - 2 2026-06-25
CXA8818 - 2 2026-07-09
CXA8692 - 2 2026-04-21
CXA8691 - 2 2026-04-21
CXA8682 - 2 2026-07-11
CXA8681 - 2 2026-07-11
CXA8555 Xiamen Airlines 2 2026-05-23
CXA8526 - 2 2026-06-07
CXA8040 - 2 2026-07-06
CXA8868 - 1 2026-04-13
CXA8867 - 1 2026-04-13
CXA8828 Xiamen Airlines 1 2026-06-25
CXA8783 - 1 2026-07-01
CXA8672 - 1 2026-06-26
CXA8671 - 1 2026-06-26
CXA8624 - 1 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CXA8781 - Jul 14, 03:35 UTCJul 14, 08:05 UTC4h 30m
2026-07-13 CXA8781 - Jul 13, 04:35 UTCJul 14, 00:30 UTC19h 55m
2026-07-13 CXA8781 - Jul 13, 04:20 UTCJul 14, 00:30 UTC20h 10m
2026-07-13 CXA8781 - Jul 13, 00:25 UTCJul 13, 07:55 UTC7h 30m
2026-07-11 CXA8359 - Jul 11, 10:15 UTCJul 11, 10:35 UTC20m
2026-07-11 CXA8682 - Jul 11, 07:10 UTCJul 11, 07:25 UTC15m
2026-07-11 CXA8681 - Jul 11, 04:25 UTCJul 11, 05:01 UTC35m
2026-07-09 CXA8818 - Jul 9, 10:50 UTCJul 9, 11:25 UTC35m
2026-07-08 CXA8051 - Jul 8, 15:40 UTCJul 9, 11:25 UTC19h 45m
2026-07-08 CXA8080 - Jul 8, 06:15 UTCJul 8, 15:40 UTC9h 25m
2026-07-06 CXA8040 - Jul 6, 11:50 UTCJul 7, 01:35 UTC13h 45m
2026-07-06 CXA8040 - Jul 6, 04:35 UTCJul 7, 01:35 UTC21h 0m
2026-07-06 CXA8781 - Jul 6, 04:15 UTCJul 7, 01:35 UTC21h 20m
2026-07-05 CXA8781 - Jul 5, 04:35 UTCJul 6, 04:30 UTC23h 55m
2026-07-04 CXA8781 - Jul 4, 23:35 UTCJul 5, 04:35 UTC5h 0m
2026-07-04 CXA8304 - Jul 4, 04:25 UTCJul 4, 04:35 UTC10m
2026-07-01 CXA8783 - Jul 1, 00:15 UTCJul 1, 03:40 UTC3h 25m
2026-06-26 CXA8672 - Jun 26, 12:55 UTCJun 26, 13:04 UTC10m
2026-06-26 CXA8671 - Jun 26, 10:35 UTCJun 26, 10:50 UTC15m
2026-06-25 CXA8828 ZUH → XMN Jun 25, 15:59 UTCJun 25, 16:14 UTC15m
2026-06-25 CXA8827 - Jun 25, 13:45 UTCJun 25, 13:55 UTC10m
2026-06-20 CXA8221 - Jun 20, 05:39 UTCJun 20, 05:49 UTC10m
2026-06-20 CXA8222 - Jun 20, 03:59 UTCJun 20, 04:09 UTC10m
2026-06-10 CXA8327 PKX → CSX Jun 10, 11:25 UTCJun 10, 11:35 UTC10m
2026-06-08 CXA8682 MFM → XMN Jun 8, 08:25 UTCJun 8, 08:35 UTC10m
2026-06-08 CXA8681 XMN → MFM Jun 8, 05:10 UTCJun 8, 05:25 UTC15m
2026-06-07 CXA8526 - Jun 7, 14:10 UTCJun 8, 02:05 UTC11h 55m
2026-06-06 CXA8388 SZX → HGH Jun 6, 08:20 UTCJun 6, 08:30 UTC10m
2026-06-03 CXA8097 NKG → HRB Jun 3, 23:25 UTCJun 3, 23:35 UTC10m
2026-05-27 CXA8070 CGQ → HGH May 27, 08:05 UTCMay 27, 12:15 UTC4h 10m
2026-05-23 CXA8555 PKX → PVG May 23, 00:45 UTCMay 23, 10:10 UTC9h 24m
2026-05-22 CXA8555 PKX → PVG May 22, 09:10 UTCMay 23, 01:20 UTC16h 10m
2026-05-22 CXA8818 HRB → HGH May 22, 00:35 UTCMay 22, 10:00 UTC9h 25m
2026-05-21 CXA8322 SYX → HGH May 21, 04:30 UTCMay 22, 01:10 UTC20h 40m
2026-05-21 CXA8321 HGH → SYX May 21, 00:20 UTCMay 21, 04:30 UTC4h 10m
2026-05-19 CXA8321 HGH → SYX May 19, 00:30 UTCMay 19, 04:25 UTC3h 55m
2026-05-18 CXA8321 HGH → SYX May 18, 06:35 UTCMay 19, 04:25 UTC21h 49m
2026-05-18 CXA8321 HGH → SYX May 18, 05:45 UTCMay 19, 04:25 UTC22h 39m
2026-05-17 CXA8624 - May 17, 05:40 UTCMay 17, 05:50 UTC10m
2026-05-17 CXA8623 - May 17, 01:25 UTCMay 17, 01:35 UTC10m
2026-05-13 CXA8076 CGQ → NGB May 13, 06:20 UTCMay 13, 06:50 UTC30m
2026-05-11 CXA8044 CGQ → HGH May 11, 06:35 UTCMay 11, 07:10 UTC35m
2026-05-09 CXA8616 - May 9, 03:50 UTCMay 9, 04:10 UTC20m
2026-05-07 CXA8385 - May 7, 01:00 UTCMay 7, 01:20 UTC20m
2026-05-06 CXA818 - May 6, 10:35 UTCMay 6, 11:45 UTC1h 10m
2026-05-06 CXA817 - May 6, 07:20 UTCMay 6, 08:30 UTC1h 10m
2026-05-05 CXA8344 SZX → HGH May 5, 14:25 UTCMay 5, 14:35 UTC10m
2026-05-05 CXA8827 XMN → ZUH May 5, 12:40 UTCMay 5, 12:55 UTC15m
2026-05-03 CXA8781 SHE → FOC May 3, 23:15 UTCMay 4, 08:00 UTC8h 45m
2026-05-02 CXA8526 - May 2, 01:25 UTCMay 2, 02:05 UTC40m

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-1550 page for operator, model, and routing details .

Mode-S 78102A frequently asked

What is Mode-S code 78102A?
78102A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1550.
Where is Mode-S 78102A registered?
Mode-S code 78102A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78102A broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78102A, octal 36010052, decimal 7,868,458.
What flights does 78102A operate?
Mode-S 78102A has broadcast 20 distinct callsigns, including CXA8781, CXA8321, CXA8222, CXA8221, CXA8827.