Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781389

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1279 · BOEING 737-800

Hex
781389
Octal
36011611
Decimal
7,869,321
Country
CN
Tail
B-1279
Type
B738
No current signal · last broadcast 7d ago
Flights observed
60
Distinct callsigns
20
Country
CN
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 781389.

Country allocation

The ICAO 24-bit address 781389 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
CUA869 China United Airlines 4 2026-07-25
CUA5509 - 4 2026-07-15
CUA2819 China United Airlines 4 2026-07-22
CUA2126 China United Airlines 4 2026-07-26
CUA880 China United Airlines 3 2026-07-19
CUA870 - 3 2026-07-25
CUA5595 China United Airlines 3 2026-06-29
CUA879 China United Airlines 2 2026-07-19
CUA5586 - 2 2026-07-13
CUA5585 - 2 2026-07-12
CUA5569 China United Airlines 2 2026-07-22
CUA5535 - 2 2026-07-15
CUA2817 - 2 2026-07-25
CUA2128 - 2 2026-07-12
CUA872 China United Airlines 1 2026-07-08
CUA871 China United Airlines 1 2026-07-08
CUA5929 - 1 2026-07-20
CUA5838 - 1 2026-06-04
CUA5822 China United Airlines 1 2026-06-08
CUA5802 China United Airlines 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CUA2126 DSN → PKX Jul 26, 02:35 UTCJul 26, 02:50 UTC15m
2026-07-25 CUA870 - Jul 25, 13:35 UTCJul 25, 14:55 UTC1h 20m
2026-07-25 CUA869 DSN → ICN Jul 25, 10:20 UTCJul 25, 11:40 UTC1h 20m
2026-07-25 CUA2817 - Jul 25, 00:10 UTCJul 25, 04:00 UTC3h 50m
2026-07-24 CUA2378 DSN → SJW Jul 24, 09:30 UTCJul 24, 09:40 UTC10m
2026-07-22 CUA2819 DSN → NKG Jul 22, 16:00 UTCJul 23, 00:15 UTC8h 15m
2026-07-22 CUA5569 PKX → DQA Jul 22, 01:30 UTCJul 22, 01:40 UTC10m
2026-07-20 CUA5929 - Jul 20, 05:40 UTCJul 20, 05:55 UTC15m
2026-07-20 CUA2126 - Jul 20, 02:35 UTCJul 20, 02:45 UTC10m
2026-07-19 CUA880 TAE → DSN Jul 19, 04:50 UTCJul 19, 05:30 UTC40m
2026-07-19 CUA879 DSN → TAE Jul 19, 02:35 UTCJul 19, 03:20 UTC45m
2026-07-15 CUA5509 - Jul 15, 23:20 UTCJul 15, 23:30 UTC10m
2026-07-15 CUA5521 - Jul 15, 11:50 UTCJul 15, 12:05 UTC15m
2026-07-15 CUA5535 - Jul 15, 04:55 UTCJul 15, 05:10 UTC15m
2026-07-15 CUA2126 - Jul 15, 02:35 UTCJul 15, 02:50 UTC15m
2026-07-13 CUA5586 - Jul 13, 04:15 UTCJul 13, 04:25 UTC10m
2026-07-12 CUA5585 - Jul 12, 23:35 UTCJul 12, 23:45 UTC10m
2026-07-12 CUA5567 - Jul 12, 03:05 UTCJul 12, 03:15 UTC10m
2026-07-12 CUA2128 - Jul 12, 00:45 UTCJul 12, 00:55 UTC10m
2026-07-10 CUA2819 - Jul 10, 23:45 UTCJul 11, 00:00 UTC15m
2026-07-10 CUA5586 - Jul 10, 04:25 UTCJul 10, 04:35 UTC10m
2026-07-09 CUA5585 - Jul 9, 23:35 UTCJul 9, 23:50 UTC15m
2026-07-09 CUA2128 - Jul 9, 00:50 UTCJul 9, 01:05 UTC15m
2026-07-08 CUA872 CJJ → DSN Jul 8, 13:00 UTCJul 8, 14:35 UTC1h 35m
2026-07-08 CUA871 DSN → CJJ Jul 8, 11:05 UTCJul 8, 11:40 UTC35m
2026-07-06 CUA2819 - Jul 6, 23:45 UTCJul 7, 00:10 UTC25m
2026-07-05 CUA5509 PKX → JXA Jul 5, 23:20 UTCJul 5, 23:30 UTC10m
2026-07-05 CUA5598 - Jul 5, 14:30 UTCJul 5, 14:45 UTC15m
2026-07-05 CUA5597 - Jul 5, 09:40 UTCJul 5, 09:50 UTC10m
2026-07-05 CUA2126 - Jul 5, 02:15 UTCJul 5, 02:25 UTC10m
2026-07-04 CUA870 ICN → DSN Jul 4, 13:15 UTCJul 4, 13:30 UTC15m
2026-07-04 CUA869 DSN → ICN Jul 4, 11:05 UTCJul 4, 11:35 UTC30m
2026-07-04 CUA2817 - Jul 4, 00:40 UTCJul 4, 10:10 UTC9h 30m
2026-07-02 CUA880 TAE → DSN Jul 2, 04:50 UTCJul 2, 05:35 UTC45m
2026-07-01 CUA870 ICN → DSN Jul 1, 13:30 UTCJul 2, 03:40 UTC14h 10m
2026-07-01 CUA869 DSN → ICN Jul 1, 11:00 UTCJul 1, 11:20 UTC20m
2026-06-30 CUA2819 - Jun 30, 23:50 UTCJul 1, 00:15 UTC25m
2026-06-29 CUA5595 PKX → DBC Jun 29, 23:49 UTCJun 30, 00:00 UTC10m
2026-06-29 CUA5651 - Jun 29, 06:09 UTCJun 29, 06:34 UTC25m
2026-06-28 CUA5509 PKX → JXA Jun 28, 23:14 UTCJun 28, 23:25 UTC10m
2026-06-27 CUA5509 PKX → JXA Jun 27, 23:25 UTCJun 27, 23:34 UTC10m
2026-06-24 CUA5801 PKX → DSN Jun 24, 08:39 UTCJun 24, 09:00 UTC20m
2026-06-21 CUA880 TAE → DSN Jun 21, 04:49 UTCJun 21, 05:35 UTC45m
2026-06-20 CUA879 DSN → TAE Jun 20, 13:19 UTCJun 21, 03:00 UTC13h 40m
2026-06-20 CUA869 DSN → ICN Jun 20, 10:55 UTCJun 20, 11:20 UTC25m
2026-06-08 CUA5822 FUO → PKX Jun 8, 09:40 UTCJun 8, 09:50 UTC10m
2026-06-04 CUA5686 HMI → PKX Jun 4, 16:15 UTCJun 4, 16:30 UTC15m
2026-06-04 CUA5685 PKX → HMI Jun 4, 09:20 UTCJun 4, 09:35 UTC15m
2026-06-04 CUA5838 - Jun 4, 05:40 UTCJun 4, 06:35 UTC55m
2026-05-29 CUA5802 DSN → PKX May 29, 05:35 UTCMay 29, 05:45 UTC10m

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-1279 page for operator, model, and routing details .

Mode-S 781389 frequently asked

What is Mode-S code 781389?
781389 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1279.
Where is Mode-S 781389 registered?
Mode-S code 781389 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781389 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781389, octal 36011611, decimal 7,869,321.
What flights does 781389 operate?
Mode-S 781389 has broadcast 20 distinct callsigns, including CUA869, CUA5509, CUA2819, CUA2126, CUA880.