Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78138A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1280 · BOEING 737-800

Hex
78138A
Octal
36011612
Decimal
7,869,322
Country
CN
Tail
B-1280
Type
B738
No current signal · last broadcast 7d ago
Flights observed
53
Distinct callsigns
20
Country
CN
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 78138A.

Country allocation

The ICAO 24-bit address 78138A 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 - 4 2026-07-15
CUA2819 China United Airlines 4 2026-07-23
CUA880 - 3 2026-07-16
CUA879 - 3 2026-07-16
CUA872 China United Airlines 3 2026-07-18
CUA871 - 3 2026-07-18
CUA5595 China United Airlines 3 2026-06-25
CUA2126 China United Airlines 3 2026-07-25
CUA877 China United Airlines 2 2026-05-19
CUA870 - 2 2026-07-15
CUA5579 China United Airlines 2 2026-07-22
CUA5529 - 2 2026-05-04
CUA5525 China United Airlines 2 2026-07-26
CUA5251 - 2 2026-05-28
CUA5929 China United Airlines 1 2026-07-25
CUA5858 China United Airlines 1 2026-07-20
CUA5818 - 1 2026-07-19
CUA5752 - 1 2026-05-09
CUA5651 - 1 2026-06-09
CUA5638 China United Airlines 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CUA5526 YSQ → PKX Jul 26, 03:55 UTCJul 26, 04:05 UTC10m
2026-07-26 CUA5525 PKX → YSQ Jul 26, 00:15 UTCJul 26, 00:30 UTC15m
2026-07-25 CUA5929 PKX → YYA Jul 25, 05:30 UTCJul 25, 05:40 UTC10m
2026-07-25 CUA2126 DSN → PKX Jul 25, 02:40 UTCJul 25, 03:10 UTC30m
2026-07-23 CUA2819 DSN → NKG Jul 23, 23:40 UTCJul 24, 00:05 UTC25m
2026-07-22 CUA5579 PKX → YNJ Jul 22, 23:50 UTCJul 23, 00:00 UTC10m
2026-07-21 CUA5622 LHW → PKX Jul 21, 05:30 UTCJul 21, 05:45 UTC15m
2026-07-20 CUA5522 HLD → PKX Jul 20, 15:30 UTCJul 20, 15:40 UTC10m
2026-07-20 CUA5858 SZX → PKX Jul 20, 03:50 UTCJul 20, 04:00 UTC10m
2026-07-19 CUA5818 - Jul 19, 10:25 UTCJul 19, 10:35 UTC10m
2026-07-19 CUA2126 - Jul 19, 02:35 UTCJul 19, 02:50 UTC15m
2026-07-18 CUA872 CJJ → DSN Jul 18, 19:55 UTCJul 18, 21:25 UTC1h 30m
2026-07-18 CUA871 - Jul 18, 17:35 UTCJul 18, 18:10 UTC35m
2026-07-18 CUA2126 - Jul 18, 02:35 UTCJul 18, 02:45 UTC10m
2026-07-16 CUA880 - Jul 16, 04:55 UTCJul 16, 23:59 UTC19h 5m
2026-07-16 CUA879 - Jul 16, 02:20 UTCJul 16, 03:00 UTC40m
2026-07-15 CUA870 - Jul 15, 13:10 UTCJul 15, 13:40 UTC30m
2026-07-15 CUA869 - Jul 15, 10:45 UTCJul 15, 11:10 UTC25m
2026-07-14 CUA5585 - Jul 14, 23:40 UTCJul 14, 23:50 UTC10m
2026-07-14 CUA5525 - Jul 14, 00:30 UTCJul 14, 00:40 UTC10m
2026-07-13 CUA2867 - Jul 13, 06:05 UTCJul 13, 06:30 UTC25m
2026-07-11 CUA2128 - Jul 11, 00:50 UTCJul 11, 01:05 UTC15m
2026-07-08 CUA2819 - Jul 8, 23:40 UTCJul 9, 00:05 UTC25m
2026-07-08 CUA870 ICN → DSN Jul 8, 13:10 UTCJul 8, 13:30 UTC20m
2026-07-08 CUA869 DSN → ICN Jul 8, 11:00 UTCJul 8, 11:30 UTC30m
2026-07-04 CUA5137 - Jul 4, 03:15 UTCJul 4, 03:25 UTC10m
2026-06-30 CUA5630 - Jun 30, 15:25 UTCJun 30, 15:40 UTC15m
2026-06-28 CUA880 TAE → DSN Jun 28, 04:40 UTCJun 29, 00:05 UTC19h 25m
2026-06-27 CUA879 DSN → TAE Jun 27, 13:30 UTCJun 28, 03:05 UTC13h 35m
2026-06-27 CUA869 DSN → ICN Jun 27, 11:55 UTCJun 27, 12:19 UTC25m
2026-06-27 CUA869 DSN → ICN Jun 27, 10:50 UTCJun 27, 11:00 UTC10m
2026-06-25 CUA5595 PKX → DBC Jun 25, 23:39 UTCJun 25, 23:49 UTC10m
2026-06-24 CUA872 CJJ → DSN Jun 24, 12:54 UTCJun 24, 23:54 UTC11h 0m
2026-06-24 CUA871 DSN → CJJ Jun 24, 10:45 UTCJun 24, 11:14 UTC30m
2026-06-21 CUA5595 PKX → DBC Jun 21, 23:40 UTCJun 21, 23:55 UTC15m
2026-06-20 CUA872 CJJ → DSN Jun 20, 13:24 UTCJun 20, 23:59 UTC10h 35m
2026-06-20 CUA871 DSN → CJJ Jun 20, 10:44 UTCJun 20, 11:09 UTC25m
2026-06-12 CUA2819 DSN → NKG Jun 12, 23:35 UTCJun 12, 23:50 UTC15m
2026-06-11 CUA880 TAE → DSN Jun 11, 04:50 UTCJun 11, 05:35 UTC45m
2026-06-11 CUA879 DSN → TAE Jun 11, 01:50 UTCJun 11, 03:20 UTC1h 30m
2026-06-09 CUA5651 - Jun 9, 06:20 UTCJun 9, 13:55 UTC7h 35m
2026-05-28 CUA5252 - May 28, 09:55 UTCMay 28, 10:05 UTC10m
2026-05-28 CUA5251 - May 28, 07:15 UTCMay 28, 08:25 UTC1h 10m
2026-05-21 CUA5595 PKX → DBC May 21, 23:45 UTCMay 21, 23:55 UTC10m
2026-05-19 CUA877 PKX → VVO May 19, 05:40 UTCMay 19, 05:55 UTC15m
2026-05-17 CUA2819 DSN → NKG May 17, 23:40 UTCMay 18, 00:05 UTC25m
2026-05-09 CUA5752 - May 9, 02:40 UTCMay 9, 03:00 UTC20m
2026-05-06 CUA5251 - May 6, 07:30 UTCMay 6, 07:45 UTC15m
2026-05-04 CUA5529 - May 4, 10:30 UTCMay 4, 10:40 UTC10m
2026-04-24 CUA5638 LHW → PKX Apr 24, 11:25 UTCApr 24, 11:40 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-1280 page for operator, model, and routing details .

Mode-S 78138A frequently asked

What is Mode-S code 78138A?
78138A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1280.
Where is Mode-S 78138A registered?
Mode-S code 78138A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78138A 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 78138A, octal 36011612, decimal 7,869,322.
What flights does 78138A operate?
Mode-S 78138A has broadcast 20 distinct callsigns, including CUA869, CUA2819, CUA880, CUA879, CUA872.