sensors Mode-S transponder

7800FF

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8971 · AIRBUS A-330-300

Hex
7800FF
Octal
36000377
Decimal
7,864,575
Country
CN
Tail
B-8971
Type
A333
No current signal · last broadcast 16h ago
Flights observed
10
Distinct callsigns
5
Country
CN
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 7800FF.

Country allocation

The ICAO 24-bit address 7800FF 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 5 distinct

Callsign Airline Flights Last seen
CES5030 China Eastern Airlines 3 2026-04-13
CES5029 - 3 2026-04-13
CES591 China Eastern Airlines 2 2026-04-14
CES516 - 1 2026-04-13
CES515 - 1 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 CES591 PVG → SVO Apr 14, 09:10 UTCApr 14, 09:40 UTC30m
2026-04-14 CES591 PVG → SVO Apr 14, 07:30 UTCApr 14, 09:05 UTC1h 35m
2026-04-13 CES5030 DPS → PVG Apr 13, 21:15 UTCApr 13, 21:35 UTC20m
2026-04-13 CES5030 DPS → PVG Apr 13, 18:55 UTCApr 13, 19:25 UTC30m
2026-04-13 CES5029 - Apr 13, 13:30 UTCApr 13, 14:10 UTC40m
2026-04-13 CES5029 - Apr 13, 11:55 UTCApr 13, 14:10 UTC2h 15m
2026-04-13 CES5029 - Apr 13, 10:40 UTCApr 13, 11:55 UTC1h 15m
2026-04-13 CES516 - Apr 13, 05:40 UTCApr 13, 06:25 UTC45m
2026-04-13 CES515 - Apr 13, 03:20 UTCApr 13, 03:45 UTC25m
2026-04-12 CES5030 DPS → PVG Apr 12, 19:20 UTCApr 12, 19:55 UTC35m

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-8971 page for operator, model, and routing details .

Mode-S 7800FF frequently asked

What is Mode-S code 7800FF?
7800FF is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8971.
Where is Mode-S 7800FF registered?
Mode-S code 7800FF is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7800FF broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7800FF, octal 36000377, decimal 7,864,575.
What flights does 7800FF operate?
Mode-S 7800FF has broadcast 5 distinct callsigns, including CES5030, CES5029, CES591, CES516, CES515.