Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781942

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20EQ · BOEING 787-9 Dreamliner

Hex
781942
Octal
36014502
Decimal
7,870,786
Country
CN
Tail
B-20EQ
Type
B789
Broadcasting now · callsign DKH1657 · 37,975 ft
Flights observed
6
Distinct callsigns
3
Country
CN
Last broadcast
1d ago

Current position

781942 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781942 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 3 distinct

Callsign Airline Flights Last seen
DKH1667 Juneyao Airlines 4 2026-04-13
DKH1668 - 1 2026-04-13
DKH1608 - 1 2026-04-12

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-13 DKH1668 - Apr 13, 20:40 UTCApr 13, 22:45 UTC2h 5m
2026-04-13 DKH1667 CGO → MXP Apr 13, 16:15 UTCApr 13, 18:10 UTC1h 55m
2026-04-13 DKH1667 CGO → MXP Apr 13, 15:50 UTCApr 13, 18:10 UTC2h 20m
2026-04-13 DKH1667 CGO → MXP Apr 13, 13:15 UTCApr 13, 16:15 UTC3h 0m
2026-04-13 DKH1667 CGO → MXP Apr 13, 09:35 UTCApr 13, 11:35 UTC2h 0m
2026-04-12 DKH1608 - Apr 12, 17:35 UTCApr 12, 18:15 UTC40m

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-20EQ page for operator, model, and routing details .

Mode-S 781942 frequently asked

What is Mode-S code 781942?
781942 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20EQ.
Where is Mode-S 781942 registered?
Mode-S code 781942 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781942 broadcasting right now?
Yes. Mode-S 781942 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781942, octal 36014502, decimal 7,870,786.
What flights does 781942 operate?
Mode-S 781942 has broadcast 3 distinct callsigns, including DKH1667, DKH1668, DKH1608.