Apparatus

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sensors Mode-S transponder

71BF19

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

Currently assigned to HL7719 · BOEING 737-900

Hex
71BF19
Octal
34337431
Decimal
7,454,489
Country
KR
Tail
HL7719
Type
B739
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
635
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 71BF19.

Country allocation

The ICAO 24-bit address 71BF19 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
JNA514 Jin Air 48 2026-07-26
JNA507 Jin Air 46 2026-07-26
JNA405 Jin Air 46 2026-07-26
JNA406 Jin Air 45 2026-07-26
JNA503 Jin Air 36 2026-07-26
JNA504 Jin Air 35 2026-07-25
JNA430 Jin Air 32 2026-07-26
JNA429 Jin Air 31 2026-07-26
JNA409 - 24 2026-07-08
JNA408 - 24 2026-07-16
JNA407 - 24 2026-07-16
JNA410 - 23 2026-07-08
JNA404 - 22 2026-07-12
JNA403 - 22 2026-07-12
JNA764 - 21 2026-07-07
JNA763 - 21 2026-07-07
JNA451 - 18 2026-07-08
JNA452 - 17 2026-07-07
JNA465 - 14 2026-07-08
JNA424 - 12 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JNA503 GMP → CJU Jul 26, 21:50 UTCJul 26, 22:15 UTC25m
2026-07-26 JNA514 CJU → GMP Jul 26, 12:55 UTCJul 26, 13:25 UTC30m
2026-07-26 JNA429 TAE → CJU Jul 26, 09:20 UTCJul 26, 09:35 UTC15m
2026-07-26 JNA430 CJU → TAE Jul 26, 07:55 UTCJul 26, 08:15 UTC20m
2026-07-26 JNA405 CJJ → CJU Jul 26, 05:35 UTCJul 26, 06:05 UTC30m
2026-07-26 JNA406 CJU → CJJ Jul 26, 03:55 UTCJul 26, 04:25 UTC30m
2026-07-26 JNA507 GMP → CJU Jul 26, 01:50 UTCJul 26, 02:25 UTC35m
2026-07-25 JNA504 CJU → GMP Jul 25, 23:55 UTCJul 26, 00:35 UTC40m
2026-07-25 JNA503 GMP → CJU Jul 25, 21:50 UTCJul 25, 22:25 UTC35m
2026-07-24 JNA504 CJU → GMP Jul 24, 00:10 UTCJul 24, 00:45 UTC35m
2026-07-23 JNA503 - Jul 23, 21:55 UTCJul 23, 22:25 UTC30m
2026-07-23 JNA514 CJU → GMP Jul 23, 13:00 UTCJul 23, 13:35 UTC35m
2026-07-23 JNA429 - Jul 23, 09:45 UTCJul 23, 09:55 UTC10m
2026-07-23 JNA430 - Jul 23, 08:20 UTCJul 23, 08:35 UTC15m
2026-07-23 JNA405 - Jul 23, 05:50 UTCJul 23, 06:20 UTC30m
2026-07-23 JNA406 CJU → CJJ Jul 23, 04:20 UTCJul 23, 04:45 UTC25m
2026-07-23 JNA507 GMP → CJU Jul 23, 02:05 UTCJul 23, 02:35 UTC30m
2026-07-23 JNA504 CJU → GMP Jul 23, 00:10 UTCJul 23, 00:50 UTC40m
2026-07-22 JNA503 - Jul 22, 21:55 UTCJul 22, 22:25 UTC30m
2026-07-22 JNA514 CJU → GMP Jul 22, 12:45 UTCJul 22, 13:25 UTC40m
2026-07-22 JNA401 CJJ → CJU Jul 22, 02:45 UTCJul 22, 03:15 UTC30m
2026-07-22 JNA402 CJU → CJJ Jul 22, 01:00 UTCJul 22, 01:40 UTC40m
2026-07-21 JNA505 GMP → CJU Jul 21, 22:45 UTCJul 21, 23:20 UTC35m
2026-07-21 JNA510 - Jul 21, 13:00 UTCJul 21, 13:35 UTC35m
2026-07-21 JNA515 - Jul 21, 10:40 UTCJul 21, 11:10 UTC30m
2026-07-21 JNA508 - Jul 21, 05:30 UTCJul 21, 06:15 UTC45m
2026-07-21 JNA401 - Jul 21, 02:50 UTCJul 21, 03:15 UTC25m
2026-07-21 JNA402 - Jul 21, 01:15 UTCJul 21, 01:45 UTC30m
2026-07-20 JNA505 GMP → CJU Jul 20, 22:50 UTCJul 20, 23:25 UTC35m
2026-07-20 JNA510 - Jul 20, 12:55 UTCJul 20, 13:40 UTC45m
2026-07-20 JNA429 - Jul 20, 09:35 UTCJul 20, 09:45 UTC10m
2026-07-20 JNA430 - Jul 20, 08:15 UTCJul 20, 08:35 UTC20m
2026-07-20 JNA405 - Jul 20, 06:05 UTCJul 20, 06:25 UTC20m
2026-07-20 JNA406 - Jul 20, 04:20 UTCJul 20, 04:50 UTC30m
2026-07-20 JNA507 - Jul 20, 02:10 UTCJul 20, 02:50 UTC40m
2026-07-20 JNA504 CJU → GMP Jul 20, 00:25 UTCJul 20, 01:00 UTC35m
2026-07-19 JNA503 - Jul 19, 22:10 UTCJul 19, 22:50 UTC40m
2026-07-19 JNA514 CJU → GMP Jul 19, 12:55 UTCJul 19, 13:30 UTC35m
2026-07-19 JNA429 - Jul 19, 09:30 UTCJul 19, 09:40 UTC10m
2026-07-19 JNA430 - Jul 19, 08:00 UTCJul 19, 08:25 UTC25m
2026-07-19 JNA405 - Jul 19, 05:55 UTCJul 19, 06:25 UTC30m
2026-07-19 JNA406 - Jul 19, 04:10 UTCJul 19, 04:35 UTC25m
2026-07-19 JNA507 - Jul 19, 01:55 UTCJul 19, 02:30 UTC35m
2026-07-19 JNA504 CJU → GMP Jul 19, 00:10 UTCJul 19, 00:50 UTC40m
2026-07-18 JNA503 - Jul 18, 22:00 UTCJul 18, 22:30 UTC30m
2026-07-16 JNA514 CJU → GMP Jul 16, 12:49 UTCJul 16, 13:30 UTC40m
2026-07-16 JNA456 - Jul 16, 10:00 UTCJul 16, 10:10 UTC10m
2026-07-16 JNA407 - Jul 16, 08:00 UTCJul 16, 08:25 UTC25m
2026-07-16 JNA408 - Jul 16, 06:15 UTCJul 16, 06:45 UTC30m
2026-07-16 JNA401 - Jul 16, 03:00 UTCJul 16, 03:30 UTC30m

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 HL7719 page for operator, model, and routing details .

Mode-S 71BF19 frequently asked

What is Mode-S code 71BF19?
71BF19 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7719.
Where is Mode-S 71BF19 registered?
Mode-S code 71BF19 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 71BF19 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF19, octal 34337431, decimal 7,454,489.
What flights does 71BF19 operate?
Mode-S 71BF19 has broadcast 20 distinct callsigns, including JNA514, JNA507, JNA405, JNA406, JNA503.