sensors Mode-S transponder

7800C0

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5542 · BOEING 737-800

Hex
7800C0
Octal
36000300
Decimal
7,864,512
Country
CN
Tail
B-5542
Type
B738
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
2
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7800C0.

Country allocation

The ICAO 24-bit address 7800C0 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 2 distinct

Callsign Airline Flights Last seen
CDG8086 - 3 2026-04-13
CDG8085 Shandong Airlines 2 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 CDG8086 - Apr 13, 08:20 UTCApr 13, 08:40 UTC20m
2026-04-13 CDG8086 - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m
2026-04-13 CDG8086 - Apr 13, 07:20 UTCApr 13, 07:40 UTC20m
2026-04-13 CDG8085 TNA → KIX Apr 13, 04:20 UTCApr 13, 05:20 UTC1h 0m
2026-04-13 CDG8085 TNA → KIX Apr 13, 04:10 UTCApr 13, 05:20 UTC1h 10m

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-5542 page for operator, model, and routing details .

Mode-S 7800C0 frequently asked

What is Mode-S code 7800C0?
7800C0 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5542.
Where is Mode-S 7800C0 registered?
Mode-S code 7800C0 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7800C0 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7800C0, octal 36000300, decimal 7,864,512.
What flights does 7800C0 operate?
Mode-S 7800C0 has broadcast 2 distinct callsigns, including CDG8086, CDG8085.