Apparatus

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sensors Mode-S transponder

781B7B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-323H · AIRBUS A-350-900

Hex
781B7B
Octal
36015573
Decimal
7,871,355
Country
CN
Tail
B-323H
Type
A359
Broadcasting now · callsign CES709 · 39,000 ft
Flights observed
111
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 19:25 UTC

Current position

781B7B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781B7B 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
CES5350 - 9 2026-07-08
CES223 China Eastern Airlines 9 2026-06-01
CES5341 - 8 2026-07-11
CES243 China Eastern Airlines 8 2026-06-08
CES250 China Eastern Airlines 7 2026-06-07
CES787 China Eastern Airlines 6 2026-07-23
CES788 China Eastern Airlines 5 2026-07-23
CES249 China Eastern Airlines 5 2026-06-06
CES224 China Eastern Airlines 5 2026-06-01
CES524 China Eastern Airlines 4 2026-05-11
CES567 - 3 2026-07-13
CES562 China Eastern Airlines 3 2026-05-29
CES244 China Eastern Airlines 3 2026-06-09
CES231 China Eastern Airlines 3 2026-07-21
CES710 China Eastern Airlines 2 2026-07-20
CES568 - 2 2026-07-13
CES561 China Eastern Airlines 2 2026-05-28
CES5360 - 2 2026-06-18
CES5342 - 2 2026-07-12
CES523 China Eastern Airlines 2 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES782 ADL → PVG Jul 26, 00:25 UTCJul 26, 19:25 UTC19h 1m
2026-07-25 CES781 PVG → ADL Jul 25, 04:10 UTCJul 25, 22:35 UTC18h 25m
2026-07-24 CES5318 CAN → SHA Jul 24, 14:05 UTCJul 25, 07:40 UTC17h 35m
2026-07-23 CES788 FCO → PVG Jul 23, 19:35 UTCJul 23, 22:50 UTC3h 15m
2026-07-23 CES787 PVG → FCO Jul 23, 06:10 UTCJul 23, 16:15 UTC10h 5m
2026-07-22 CES787 PVG → FCO Jul 22, 12:50 UTCJul 23, 12:45 UTC23h 55m
2026-07-22 CES232 CMB → PVG Jul 22, 11:30 UTCJul 23, 10:05 UTC22h 35m
2026-07-21 CES231 PVG → CMB Jul 21, 20:35 UTCJul 22, 05:25 UTC8h 50m
2026-07-21 CES231 PVG → CMB Jul 21, 08:50 UTCJul 22, 05:25 UTC20h 35m
2026-07-21 CES231 PVG → CMB Jul 21, 08:25 UTCJul 22, 05:25 UTC21h 0m
2026-07-20 CES710 MAD → PVG Jul 20, 10:50 UTCJul 21, 06:45 UTC19h 55m
2026-07-20 CES710 MAD → PVG Jul 20, 10:00 UTCJul 21, 06:45 UTC20h 45m
2026-07-19 CES709 - Jul 19, 19:00 UTCJul 20, 06:15 UTC11h 15m
2026-07-18 CES262 - Jul 18, 21:15 UTCJul 19, 07:30 UTC10h 15m
2026-07-18 CES261 - Jul 18, 08:45 UTCJul 18, 17:10 UTC8h 25m
2026-07-14 CES6050 - Jul 14, 10:40 UTCJul 14, 13:30 UTC2h 50m
2026-07-13 CES568 - Jul 13, 13:00 UTCJul 14, 08:20 UTC19h 20m
2026-07-13 CES568 - Jul 13, 10:00 UTCJul 14, 08:20 UTC22h 20m
2026-07-13 CES567 - Jul 13, 03:55 UTCJul 13, 08:05 UTC4h 10m
2026-07-12 CES567 - Jul 12, 06:40 UTCJul 13, 04:40 UTC22h 0m
2026-07-12 CES5342 - Jul 12, 05:25 UTCJul 12, 05:35 UTC10m
2026-07-11 CES5341 - Jul 11, 09:20 UTCJul 11, 09:30 UTC10m
2026-07-08 CES5350 - Jul 8, 13:25 UTCJul 8, 13:35 UTC10m
2026-07-08 CES5341 - Jul 8, 10:35 UTCJul 8, 11:10 UTC35m
2026-07-04 CES5350 - Jul 4, 14:25 UTCJul 4, 14:35 UTC10m
2026-07-04 CES5341 - Jul 4, 12:45 UTCJul 4, 13:00 UTC15m
2026-07-03 CES5350 - Jul 3, 15:15 UTCJul 3, 15:25 UTC10m
2026-07-03 CES5341 - Jul 3, 13:30 UTCJul 3, 13:40 UTC10m
2026-07-02 CES5350 - Jul 2, 12:45 UTCJul 2, 13:00 UTC15m
2026-06-18 CES5360 - Jun 18, 19:15 UTCJun 18, 19:25 UTC10m
2026-06-17 CES5360 - Jun 17, 15:00 UTCJun 17, 15:10 UTC10m
2026-06-13 CES5350 SZX → SHA Jun 13, 10:55 UTCJun 13, 11:05 UTC10m
2026-06-09 CES244 MXP → PVG Jun 9, 12:00 UTCJun 9, 18:20 UTC6h 20m
2026-06-08 CES243 PVG → MXP Jun 8, 19:15 UTCJun 9, 05:25 UTC10h 10m
2026-06-08 CES243 PVG → MXP Jun 8, 06:50 UTCJun 9, 05:25 UTC22h 35m
2026-06-08 CES243 PVG → MXP Jun 8, 05:20 UTCJun 9, 04:45 UTC23h 25m
2026-06-07 CES250 BCN → PVG Jun 7, 09:45 UTCJun 8, 03:40 UTC17h 55m
2026-06-06 CES249 PVG → BCN Jun 6, 18:19 UTCJun 7, 05:10 UTC10h 50m
2026-06-06 CES249 PVG → BCN Jun 6, 06:50 UTCJun 7, 05:10 UTC22h 20m
2026-06-06 CES249 PVG → BCN Jun 6, 06:40 UTCJun 7, 04:45 UTC22h 5m
2026-06-05 CES218 GVA → PVG Jun 5, 10:50 UTCJun 6, 05:00 UTC18h 10m
2026-06-05 CES218 GVA → PVG Jun 5, 10:20 UTCJun 6, 05:00 UTC18h 40m
2026-06-04 CES217 PVG → GVA Jun 4, 19:20 UTCJun 5, 05:15 UTC9h 55m
2026-06-01 CES224 CAI → PVG Jun 1, 11:30 UTCJun 1, 17:05 UTC5h 35m
2026-06-01 CES223 PVG → CAI Jun 1, 02:30 UTCJun 1, 05:55 UTC3h 25m
2026-05-30 CES7236 HAN → PVG May 30, 23:15 UTCMay 31, 01:11 UTC1h 56m
2026-05-30 CES7235 PVG → HAN May 30, 08:05 UTCMay 30, 18:55 UTC10h 50m
2026-05-29 CES562 SYD → PVG May 29, 08:50 UTCMay 30, 08:25 UTC23h 35m
2026-05-29 CES562 SYD → PVG May 29, 01:15 UTCMay 29, 10:15 UTC9h 0m
2026-05-28 CES561 PVG → SYD May 28, 13:25 UTCMay 28, 22:50 UTC9h 25m

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-323H page for operator, model, and routing details .

Mode-S 781B7B frequently asked

What is Mode-S code 781B7B?
781B7B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-323H.
Where is Mode-S 781B7B registered?
Mode-S code 781B7B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B7B broadcasting right now?
Yes. Mode-S 781B7B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B7B, octal 36015573, decimal 7,871,355.
What flights does 781B7B operate?
Mode-S 781B7B has broadcast 20 distinct callsigns, including CES5350, CES223, CES5341, CES243, CES250.