Apparatus

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sensors Mode-S transponder

781E3F

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32C5 · AIRBUS A-320neo

Hex
781E3F
Octal
36017077
Decimal
7,872,063
Country
CN
Tail
B-32C5
Type
A20N
No current signal · last broadcast Jul 26, 05:50 UTC
Flights observed
91
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 05:50 UTC

Last known position

Most recent position reported by Mode-S 781E3F.

Country allocation

The ICAO 24-bit address 781E3F 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
CES6109 China Eastern Airlines 8 2026-07-25
CES873 - 7 2026-07-16
CES6270 China Eastern Airlines 7 2026-07-25
CES6110 China Eastern Airlines 6 2026-07-26
CES6235 China Eastern Airlines 5 2026-07-24
CES874 - 4 2026-07-16
CES6269 China Eastern Airlines 4 2026-07-25
CES6229 China Eastern Airlines 3 2026-05-19
CES5031 China Eastern Airlines 3 2026-05-04
CES2071 China Eastern Airlines 3 2026-07-18
CES6676 China Eastern Airlines 2 2026-07-24
CES6236 China Eastern Airlines 2 2026-04-23
CES6230 - 2 2026-05-02
CES6108 China Eastern Airlines 2 2026-05-05
CES6107 China Eastern Airlines 2 2026-07-23
CES5032 China Eastern Airlines 2 2026-05-04
CES5022 - 2 2026-07-10
CES5021 - 2 2026-07-10
CES2072 - 2 2026-07-18
CES2070 - 2 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES6110 JHG → TAO Jul 26, 05:35 UTCJul 26, 05:50 UTC15m
2026-07-25 CES6109 TAO → JHG Jul 25, 13:20 UTCJul 25, 13:40 UTC20m
2026-07-25 CES6270 PKX → XMN Jul 25, 10:55 UTCJul 25, 11:05 UTC10m
2026-07-25 CES6269 XMN → PKX Jul 25, 02:45 UTCJul 25, 03:10 UTC25m
2026-07-24 CES6235 PKX → HRB Jul 24, 15:45 UTCJul 24, 16:00 UTC15m
2026-07-24 CES6676 HAK → PKX Jul 24, 13:45 UTCJul 24, 14:10 UTC25m
2026-07-24 CES6675 PKX → HAK Jul 24, 07:45 UTCJul 24, 08:15 UTC30m
2026-07-24 CES6110 JHG → TAO Jul 24, 06:00 UTCJul 24, 06:20 UTC20m
2026-07-23 CES6109 TAO → JHG Jul 23, 14:10 UTCJul 23, 14:30 UTC20m
2026-07-23 CES6107 NGB → TAO Jul 23, 01:30 UTCJul 23, 10:35 UTC9h 5m
2026-07-22 CES6312 CAN → PKX Jul 22, 12:50 UTCJul 22, 13:00 UTC10m
2026-07-21 CES6109 TAO → JHG Jul 21, 13:50 UTCJul 21, 14:00 UTC10m
2026-07-20 CES6235 - Jul 20, 18:30 UTCJul 20, 18:45 UTC15m
2026-07-20 CES6676 HAK → PKX Jul 20, 15:20 UTCJul 20, 15:45 UTC25m
2026-07-20 CES6110 JHG → TAO Jul 20, 05:25 UTCJul 20, 05:40 UTC15m
2026-07-19 CES6109 TAO → JHG Jul 19, 13:25 UTCJul 19, 13:45 UTC20m
2026-07-19 CES6270 PKX → XMN Jul 19, 11:05 UTCJul 19, 11:15 UTC10m
2026-07-18 CES2072 - Jul 18, 20:00 UTCJul 18, 20:25 UTC25m
2026-07-18 CES2071 PKX → BKK Jul 18, 17:20 UTCJul 18, 17:35 UTC15m
2026-07-18 CES2071 PKX → BKK Jul 18, 16:00 UTCJul 18, 16:20 UTC20m
2026-07-18 CES6270 - Jul 18, 10:45 UTCJul 18, 10:55 UTC10m
2026-07-18 CES6269 - Jul 18, 02:25 UTCJul 18, 02:45 UTC20m
2026-07-16 CES874 - Jul 16, 08:10 UTCJul 16, 11:05 UTC2h 55m
2026-07-16 CES873 - Jul 16, 03:30 UTCJul 16, 06:30 UTC3h 0m
2026-07-10 CES5022 - Jul 10, 05:45 UTCJul 10, 06:10 UTC25m
2026-07-10 CES5021 - Jul 10, 03:55 UTCJul 10, 04:25 UTC30m
2026-07-09 CES874 - Jul 9, 08:05 UTCJul 9, 08:15 UTC10m
2026-07-08 CES873 - Jul 8, 10:35 UTCJul 9, 06:45 UTC20h 10m
2026-07-08 CES874 - Jul 8, 08:10 UTCJul 8, 08:25 UTC15m
2026-07-08 CES873 - Jul 8, 06:15 UTCJul 8, 06:50 UTC35m
2026-07-08 CES873 - Jul 8, 03:45 UTCJul 8, 04:10 UTC25m
2026-07-07 CES873 - Jul 7, 05:50 UTCJul 8, 04:10 UTC22h 20m
2026-07-07 CES5022 - Jul 7, 05:35 UTCJul 8, 03:45 UTC22h 10m
2026-07-07 CES5021 - Jul 7, 03:55 UTCJul 7, 04:15 UTC20m
2026-07-01 CES2070 - Jul 1, 06:30 UTCJul 2, 00:05 UTC17h 35m
2026-07-01 CES2069 - Jul 1, 01:15 UTCJul 1, 04:20 UTC3h 5m
2026-06-29 CES874 - Jun 29, 07:59 UTCJun 29, 11:04 UTC3h 5m
2026-06-29 CES873 - Jun 29, 06:05 UTCJun 29, 06:29 UTC25m
2026-06-28 CES873 - Jun 28, 13:10 UTCJun 29, 04:00 UTC14h 50m
2026-06-28 CES2139 - Jun 28, 04:55 UTCJun 28, 11:00 UTC6h 5m
2026-06-26 CES861 XIY → PQC Jun 26, 10:50 UTCJun 26, 16:09 UTC5h 20m
2026-06-21 CES2183 XIY → SHE Jun 21, 23:50 UTCJun 22, 00:04 UTC15m
2026-06-20 CES6528 - Jun 20, 13:29 UTCJun 20, 13:44 UTC15m
2026-06-20 CES6110 - Jun 20, 05:19 UTCJun 20, 05:34 UTC15m
2026-06-19 CES6109 - Jun 19, 13:09 UTCJun 19, 13:29 UTC20m
2026-06-19 CES6270 - Jun 19, 10:59 UTCJun 19, 11:09 UTC10m
2026-06-12 CES2070 SIN → XIY Jun 12, 06:40 UTCJun 12, 09:35 UTC2h 55m
2026-06-12 CES2069 - Jun 12, 01:20 UTCJun 12, 04:15 UTC2h 55m
2026-06-07 CES6350 DSN → PVG Jun 7, 00:30 UTCJun 7, 00:55 UTC25m
2026-06-02 CES2236 KHN → XIY Jun 2, 12:05 UTCJun 2, 12:20 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-32C5 page for operator, model, and routing details .

Mode-S 781E3F frequently asked

What is Mode-S code 781E3F?
781E3F is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32C5.
Where is Mode-S 781E3F registered?
Mode-S code 781E3F is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781E3F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781E3F, octal 36017077, decimal 7,872,063.
What flights does 781E3F operate?
Mode-S 781E3F has broadcast 20 distinct callsigns, including CES6109, CES873, CES6270, CES6110, CES6235.