Apparatus

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sensors Mode-S transponder

71BF78

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL7778 · HAWKER BEECHCRAFT Hawker 750/850

Hex
71BF78
Octal
34337570
Decimal
7,454,584
Country
KR
Tail
HL7778
Type
H25B
No current signal · last broadcast 1d ago
Flights observed
24
Distinct callsigns
1
Country
KR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 71BF78.

Country allocation

The ICAO 24-bit address 71BF78 falls within the block assigned to Korea, South (KR) by ICAO Annex 10, Volume III. Every aircraft registered in Korea, South 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 1 distinct

Callsign Airline Flights Last seen
FC78 - 24 2026-05-29

Recent flights last 24

DateFlightRouteTakeoffLandingDuration
2026-05-29 FC78 - May 29, 05:15 UTCMay 29, 06:35 UTC1h 20m
2026-05-28 FC78 - May 28, 05:15 UTCMay 28, 08:00 UTC2h 45m
2026-05-19 FC78 - May 19, 07:05 UTCMay 19, 07:40 UTC35m
2026-05-19 FC78 - May 19, 04:35 UTCMay 19, 05:05 UTC30m
2026-05-14 FC78 - May 14, 06:35 UTCMay 14, 06:50 UTC15m
2026-05-14 FC78 - May 14, 04:50 UTCMay 14, 05:20 UTC30m
2026-05-13 FC78 - May 13, 07:15 UTCMay 13, 07:45 UTC30m
2026-05-13 FC78 - May 13, 01:15 UTCMay 13, 01:40 UTC25m
2026-05-11 FC78 - May 11, 03:10 UTCMay 11, 03:45 UTC35m
2026-05-11 FC78 - May 11, 01:15 UTCMay 11, 01:45 UTC30m
2026-05-06 FC78 - May 6, 05:15 UTCMay 6, 06:00 UTC45m
2026-05-06 FC78 - May 6, 01:25 UTCMay 6, 02:01 UTC35m
2026-04-29 FC78 - Apr 29, 06:45 UTCApr 29, 07:20 UTC35m
2026-04-29 FC78 - Apr 29, 04:15 UTCApr 29, 04:44 UTC30m
2026-04-28 FC78 - Apr 28, 04:15 UTCApr 28, 06:10 UTC1h 55m
2026-04-21 FC78 - Apr 21, 05:10 UTCApr 21, 05:55 UTC45m
2026-04-21 FC78 - Apr 21, 01:15 UTCApr 21, 01:50 UTC35m
2026-04-17 FC78 - Apr 17, 01:20 UTCApr 17, 03:15 UTC1h 55m
2026-04-17 FC78 - Apr 17, 00:44 UTCApr 17, 01:15 UTC30m
2026-04-15 FC78 - Apr 15, 05:30 UTCApr 15, 05:55 UTC25m
2026-04-15 FC78 - Apr 15, 04:10 UTCApr 15, 04:35 UTC25m
2026-04-14 FC78 - Apr 14, 10:50 UTCApr 14, 11:05 UTC15m
2026-04-14 FC78 - Apr 14, 10:15 UTCApr 14, 10:30 UTC15m
2026-04-14 FC78 - Apr 14, 06:00 UTCApr 14, 06:15 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 HL7778 page for operator, model, and routing details .

Mode-S 71BF78 frequently asked

What is Mode-S code 71BF78?
71BF78 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7778.
Where is Mode-S 71BF78 registered?
Mode-S code 71BF78 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71BF78 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 71BF78, octal 34337570, decimal 7,454,584.
What flights does 71BF78 operate?
Mode-S 71BF78 has broadcast 1 distinct callsign, including FC78.