Apparatus

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sensors Mode-S transponder

781B9E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-323X · AIRBUS A-320

Hex
781B9E
Octal
36015636
Decimal
7,871,390
Country
CN
Tail
B-323X
Type
A320
No current signal · last broadcast 5h ago
Flights observed
49
Distinct callsigns
20
Country
CN
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 781B9E.

Country allocation

The ICAO 24-bit address 781B9E 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
UEA2817 - 4 2026-07-14
UEA2713 - 4 2026-07-05
UEA1869 - 3 2026-07-03
UEA2818 - 2 2026-07-04
UEA2720 United Eagle Airlines 2 2026-06-04
UEA2714 United Eagle Airlines 2 2026-05-04
UEA2449 - 2 2026-07-07
UEA2288 - 2 2026-07-08
UEA2287 - 2 2026-07-09
UEA2263 - 2 2026-06-20
UEA2253 - 2 2026-07-06
UEA1858 - 2 2026-06-28
UEA1848 - 2 2026-07-13
UEA1821 - 2 2026-06-23
UEA2757 - 1 2026-06-21
UEA2716 - 1 2026-06-14
UEA2442 United Eagle Airlines 1 2026-04-20
UEA2414 United Eagle Airlines 1 2026-06-04
UEA2413 United Eagle Airlines 1 2026-06-04
UEA2264 United Eagle Airlines 1 2026-06-12

Recent flights last 49

DateFlightRouteTakeoffLandingDuration
2026-07-14 UEA2817 - Jul 14, 01:20 UTCJul 14, 01:30 UTC10m
2026-07-13 UEA1847 - Jul 13, 10:35 UTCJul 13, 10:45 UTC10m
2026-07-13 UEA1848 - Jul 13, 02:45 UTCJul 13, 02:55 UTC10m
2026-07-12 UEA1848 - Jul 12, 01:05 UTCJul 12, 01:15 UTC10m
2026-07-09 UEA2287 - Jul 9, 03:10 UTCJul 9, 07:35 UTC4h 25m
2026-07-08 UEA2288 - Jul 8, 06:55 UTCJul 9, 03:50 UTC20h 55m
2026-07-08 UEA2288 - Jul 8, 03:25 UTCJul 8, 07:30 UTC4h 5m
2026-07-07 UEA2449 - Jul 7, 07:20 UTCJul 7, 12:40 UTC5h 20m
2026-07-06 UEA2254 - Jul 6, 05:00 UTCJul 6, 05:10 UTC10m
2026-07-06 UEA2253 - Jul 6, 03:15 UTCJul 6, 03:45 UTC30m
2026-07-05 UEA2253 - Jul 5, 07:00 UTCJul 6, 00:50 UTC17h 50m
2026-07-05 UEA2713 - Jul 5, 02:15 UTCJul 5, 02:25 UTC10m
2026-07-04 UEA2818 - Jul 4, 10:45 UTCJul 4, 11:05 UTC20m
2026-07-04 UEA2817 - Jul 4, 02:25 UTCJul 4, 02:40 UTC15m
2026-07-03 UEA1869 - Jul 3, 07:00 UTCJul 3, 13:25 UTC6h 25m
2026-07-02 UEA1869 - Jul 2, 13:15 UTCJul 3, 10:00 UTC20h 45m
2026-07-02 UEA1869 - Jul 2, 09:40 UTCJul 3, 07:15 UTC21h 35m
2026-07-02 UEA2713 - Jul 2, 01:35 UTCJul 2, 13:15 UTC11h 40m
2026-07-01 UEA2713 - Jul 1, 13:50 UTCJul 2, 13:15 UTC23h 25m
2026-06-30 UEA2818 - Jun 30, 09:55 UTCJun 30, 10:05 UTC10m
2026-06-30 UEA2817 - Jun 30, 00:25 UTCJun 30, 00:35 UTC10m
2026-06-29 UEA1873 - Jun 29, 13:49 UTCJun 29, 14:04 UTC15m
2026-06-28 UEA1858 - Jun 28, 12:35 UTCJun 28, 12:50 UTC15m
2026-06-25 UEA1858 - Jun 25, 13:59 UTCJun 26, 12:24 UTC22h 25m
2026-06-23 UEA1821 - Jun 23, 13:15 UTCJun 23, 15:24 UTC2h 10m
2026-06-21 UEA2757 - Jun 21, 07:29 UTCJun 21, 07:45 UTC15m
2026-06-20 UEA2263 - Jun 20, 10:09 UTCJun 21, 07:45 UTC21h 35m
2026-06-20 UEA2263 - Jun 20, 06:29 UTCJun 20, 10:25 UTC3h 55m
2026-06-14 UEA2716 - Jun 14, 12:20 UTCJun 14, 12:30 UTC10m
2026-06-12 UEA2264 HGH → HAK Jun 12, 07:15 UTCJun 12, 09:55 UTC2h 40m
2026-06-04 UEA2720 ZUH → TFU Jun 4, 13:10 UTCJun 4, 13:20 UTC10m
2026-06-04 UEA2414 HAK → TFU Jun 4, 06:05 UTCJun 4, 06:20 UTC15m
2026-06-04 UEA2413 TFU → HAK Jun 4, 03:50 UTCJun 4, 04:05 UTC15m
2026-06-03 UEA2720 ZUH → TFU Jun 3, 13:50 UTCJun 3, 14:05 UTC15m
2026-06-02 UEA2218 SZX → CTU Jun 2, 04:05 UTCJun 2, 04:20 UTC15m
2026-06-01 UEA2207 CTU → SYX Jun 1, 04:05 UTCJun 1, 15:25 UTC11h 20m
2026-05-31 UEA1970 - May 31, 09:55 UTCJun 1, 06:25 UTC20h 30m
2026-05-30 UEA1822 - May 30, 17:40 UTCMay 31, 10:00 UTC16h 20m
2026-05-30 UEA1821 - May 30, 05:25 UTCMay 30, 13:35 UTC8h 10m
2026-05-07 UEA2817 SHE → WUT May 7, 00:30 UTCMay 7, 00:40 UTC10m
2026-05-04 UEA2714 SYX → HFE May 4, 01:30 UTCMay 4, 13:30 UTC12h 0m
2026-05-02 UEA1823 - May 2, 02:20 UTCMay 2, 02:45 UTC25m
2026-05-01 UEA1959 TFU → HRB May 1, 03:10 UTCMay 1, 03:30 UTC20m
2026-04-29 UEA2244 - Apr 29, 12:55 UTCApr 29, 13:05 UTC10m
2026-04-28 UEA2287 - Apr 28, 03:25 UTCApr 28, 07:20 UTC3h 55m
2026-04-25 UEA2449 TFU → HFE Apr 25, 05:50 UTCApr 25, 10:10 UTC4h 20m
2026-04-20 UEA2442 CSX → SHE Apr 20, 06:30 UTCApr 20, 06:45 UTC15m
2026-04-13 UEA2714 - Apr 13, 11:20 UTCApr 13, 11:30 UTC10m
2026-04-13 UEA2713 - Apr 13, 07:55 UTCApr 13, 08:05 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-323X page for operator, model, and routing details .

Mode-S 781B9E frequently asked

What is Mode-S code 781B9E?
781B9E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-323X.
Where is Mode-S 781B9E registered?
Mode-S code 781B9E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B9E broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B9E, octal 36015636, decimal 7,871,390.
What flights does 781B9E operate?
Mode-S 781B9E has broadcast 20 distinct callsigns, including UEA2817, UEA2713, UEA1869, UEA2818, UEA2720.