Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF24

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

Currently assigned to HL7724 · BOEING 737-900

Hex
71BF24
Octal
34337444
Decimal
7,454,500
Country
KR
Tail
HL7724
Type
B739
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
520
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S 71BF24.

Country allocation

The ICAO 24-bit address 71BF24 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 20 distinct

Callsign Airline Flights Last seen
JNA409 Jin Air 31 2026-07-26
JNA410 Jin Air 29 2026-07-26
JNA764 - 24 2026-07-25
JNA406 - 24 2026-07-21
JNA405 - 24 2026-07-21
JNA451 Jin Air 23 2026-07-26
JNA404 Jin Air 23 2026-07-25
JNA763 - 22 2026-07-21
JNA403 Jin Air 22 2026-07-25
JNA507 - 21 2026-07-21
JNA452 Jin Air 21 2026-07-25
JNA466 Jin Air 20 2026-07-26
JNA514 Jin Air 19 2026-07-20
JNA465 Jin Air 19 2026-07-26
JNA407 - 19 2026-07-23
JNA456 - 18 2026-07-23
JNA429 - 18 2026-07-21
JNA408 - 18 2026-07-23
JNA455 - 17 2026-07-23
JNA430 - 17 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JNA714 - Jul 26, 18:15 UTCJul 26, 19:45 UTC1h 30m
2026-07-26 JNA713 - Jul 26, 15:35 UTCJul 26, 15:45 UTC10m
2026-07-26 JNA713 - Jul 26, 14:00 UTCJul 26, 14:55 UTC55m
2026-07-26 JNA409 CJJ → CJU Jul 26, 10:50 UTCJul 26, 11:15 UTC25m
2026-07-26 JNA410 CJU → CJJ Jul 26, 09:10 UTCJul 26, 09:40 UTC30m
2026-07-26 JNA465 KUV → CJU Jul 26, 07:20 UTCJul 26, 07:30 UTC10m
2026-07-26 JNA466 CJU → KUV Jul 26, 05:45 UTCJul 26, 05:55 UTC10m
2026-07-26 JNA423 TAE → CJU Jul 26, 03:45 UTCJul 26, 04:00 UTC15m
2026-07-26 JNA424 CJU → TAE Jul 26, 02:25 UTCJul 26, 02:35 UTC10m
2026-07-26 JNA451 KWJ → CJU Jul 26, 00:20 UTCJul 26, 00:35 UTC15m
2026-07-25 JNA452 CJU → KWJ Jul 25, 23:05 UTCJul 25, 23:15 UTC10m
2026-07-25 JNA764 - Jul 25, 19:15 UTCJul 25, 19:30 UTC15m
2026-07-25 JNA763A - Jul 25, 14:50 UTCJul 25, 15:10 UTC20m
2026-07-25 JNA409 - Jul 25, 11:35 UTCJul 25, 12:05 UTC30m
2026-07-25 JNA410 CJU → CJJ Jul 25, 10:10 UTCJul 25, 10:40 UTC30m
2026-07-25 JNA465 KUV → CJU Jul 25, 08:30 UTCJul 25, 08:45 UTC15m
2026-07-25 JNA466 CJU → KUV Jul 25, 07:05 UTCJul 25, 07:20 UTC15m
2026-07-25 JNA403 CJJ → CJU Jul 25, 04:00 UTCJul 25, 04:35 UTC35m
2026-07-25 JNA404 CJU → CJJ Jul 25, 02:25 UTCJul 25, 02:55 UTC30m
2026-07-24 JNA409 - Jul 24, 10:35 UTCJul 24, 11:05 UTC30m
2026-07-24 JNA410 - Jul 24, 09:05 UTCJul 24, 09:35 UTC30m
2026-07-24 JNA465 - Jul 24, 07:20 UTCJul 24, 07:35 UTC15m
2026-07-24 JNA466 CJU → KUV Jul 24, 06:00 UTCJul 24, 06:10 UTC10m
2026-07-24 JNA403 CJJ → CJU Jul 24, 03:55 UTCJul 24, 04:25 UTC30m
2026-07-24 JNA404 CJU → CJJ Jul 24, 02:25 UTCJul 24, 02:55 UTC30m
2026-07-23 JNA455 - Jul 23, 11:10 UTCJul 23, 11:20 UTC10m
2026-07-23 JNA456 - Jul 23, 10:00 UTCJul 23, 10:10 UTC10m
2026-07-23 JNA407 - Jul 23, 07:45 UTCJul 23, 08:10 UTC25m
2026-07-23 JNA408 - Jul 23, 06:00 UTCJul 23, 06:30 UTC30m
2026-07-23 JNA403 CJJ → CJU Jul 23, 03:55 UTCJul 23, 04:25 UTC30m
2026-07-23 JNA404 CJU → CJJ Jul 23, 01:50 UTCJul 23, 02:20 UTC30m
2026-07-23 JNA451 - Jul 23, 00:05 UTCJul 23, 00:15 UTC10m
2026-07-22 JNA714 - Jul 22, 18:25 UTCJul 22, 19:45 UTC1h 20m
2026-07-22 JNA713 - Jul 22, 14:20 UTCJul 22, 15:50 UTC1h 30m
2026-07-22 JNA409 - Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 JNA423 - Jul 22, 03:45 UTCJul 22, 04:00 UTC15m
2026-07-22 JNA424 CJU → TAE Jul 22, 02:15 UTCJul 22, 02:35 UTC20m
2026-07-22 JNA451 - Jul 22, 00:20 UTCJul 22, 00:30 UTC10m
2026-07-21 JNA452 - Jul 21, 23:00 UTCJul 21, 23:10 UTC10m
2026-07-21 JNA764 - Jul 21, 19:20 UTCJul 21, 19:35 UTC15m
2026-07-21 JNA763 - Jul 21, 14:45 UTCJul 21, 15:05 UTC20m
2026-07-21 JNA429 - Jul 21, 10:05 UTCJul 21, 10:15 UTC10m
2026-07-21 JNA430 - Jul 21, 08:45 UTCJul 21, 09:00 UTC15m
2026-07-21 JNA405 - Jul 21, 06:35 UTCJul 21, 07:00 UTC25m
2026-07-21 JNA406 - Jul 21, 05:05 UTCJul 21, 05:30 UTC25m
2026-07-21 JNA507 - Jul 21, 01:50 UTCJul 21, 02:25 UTC35m
2026-07-20 JNA514 CJU → GMP Jul 20, 13:15 UTCJul 20, 13:55 UTC40m
2026-07-20 JNA409 - Jul 20, 10:45 UTCJul 20, 11:20 UTC35m
2026-07-20 JNA410 - Jul 20, 09:10 UTCJul 20, 09:40 UTC30m
2026-07-20 JNA465 - Jul 20, 07:20 UTCJul 20, 07:35 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 HL7724 page for operator, model, and routing details .

Mode-S 71BF24 frequently asked

What is Mode-S code 71BF24?
71BF24 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7724.
Where is Mode-S 71BF24 registered?
Mode-S code 71BF24 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 71BF24 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF24, octal 34337444, decimal 7,454,500.
What flights does 71BF24 operate?
Mode-S 71BF24 has broadcast 20 distinct callsigns, including JNA409, JNA410, JNA764, JNA406, JNA405.