Apparatus

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sensors Mode-S transponder

71BF18

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

Currently assigned to HL7718 · BOEING 737-900

Hex
71BF18
Octal
34337430
Decimal
7,454,488
Country
KR
Tail
HL7718
Type
B739
No current signal · last broadcast 2h ago
Flights observed
287
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 71BF18.

Country allocation

The ICAO 24-bit address 71BF18 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
JNA507 Jin Air 21 2026-05-30
JNA406 Jin Air 21 2026-05-30
JNA405 Jin Air 20 2026-05-30
JNA514 Jin Air 19 2026-05-29
JNA504 Jin Air 18 2026-05-30
JNA408 Jin Air 18 2026-05-29
JNA407 Jin Air 18 2026-05-29
JNA403 Jin Air 18 2026-05-28
JNA404 Jin Air 17 2026-05-28
JNA503 Jin Air 15 2026-05-29
JNA456 Jin Air 15 2026-05-13
JNA455 Jin Air 10 2026-05-12
JNA764 Jin Air 9 2026-05-15
JNA763 Jin Air 9 2026-05-15
JNA430 Jin Air 8 2026-05-27
JNA429 Jin Air 7 2026-05-30
JNA410 Jin Air 7 2026-05-16
JNA409 Jin Air 7 2026-05-16
JNA451 Jin Air 5 2026-05-11
JNA465 Jin Air 4 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JNA429 TAE → CJU May 30, 09:10 UTCMay 30, 09:20 UTC10m
2026-05-30 JNA405 CJJ → CJU May 30, 05:25 UTCMay 30, 05:45 UTC20m
2026-05-30 JNA406 CJU → CJJ May 30, 04:00 UTCMay 30, 04:20 UTC20m
2026-05-30 JNA507 GMP → CJU May 30, 01:45 UTCMay 30, 02:06 UTC21m
2026-05-30 JNA504 CJU → GMP May 30, 00:00 UTCMay 30, 00:35 UTC35m
2026-05-29 JNA503 GMP → CJU May 29, 21:45 UTCMay 29, 22:10 UTC25m
2026-05-29 JNA514 CJU → GMP May 29, 13:10 UTCMay 29, 13:45 UTC35m
2026-05-29 JNA407 CJJ → CJU May 29, 07:55 UTCMay 29, 08:05 UTC10m
2026-05-29 JNA408 CJU → CJJ May 29, 06:00 UTCMay 29, 06:25 UTC25m
2026-05-29 JNA424 CJU → TAE May 29, 02:40 UTCMay 29, 02:50 UTC10m
2026-05-28 JNA407 CJJ → CJU May 28, 07:40 UTCMay 28, 07:55 UTC15m
2026-05-28 JNA408 CJU → CJJ May 28, 06:05 UTCMay 28, 06:25 UTC20m
2026-05-28 JNA403 CJJ → CJU May 28, 03:50 UTCMay 28, 04:10 UTC20m
2026-05-28 JNA404 CJU → CJJ May 28, 02:20 UTCMay 28, 02:40 UTC20m
2026-05-27 JNA430 CJU → TAE May 27, 08:05 UTCMay 27, 08:15 UTC10m
2026-05-27 JNA405 CJJ → CJU May 27, 05:40 UTCMay 27, 05:59 UTC20m
2026-05-27 JNA406 CJU → CJJ May 27, 03:54 UTCMay 27, 04:19 UTC25m
2026-05-27 JNA507 GMP → CJU May 27, 01:49 UTCMay 27, 02:09 UTC20m
2026-05-27 JNA504 CJU → GMP May 27, 00:14 UTCMay 27, 00:55 UTC40m
2026-05-26 JNA503 GMP → CJU May 26, 21:49 UTCMay 26, 22:15 UTC25m
2026-05-26 JNA514 CJU → GMP May 26, 13:00 UTCMay 26, 13:34 UTC35m
2026-05-26 JNA405 CJJ → CJU May 26, 05:59 UTCMay 26, 06:20 UTC20m
2026-05-26 JNA406 CJU → CJJ May 26, 04:15 UTCMay 26, 04:35 UTC20m
2026-05-26 JNA507 GMP → CJU May 26, 01:49 UTCMay 26, 02:15 UTC25m
2026-05-25 JNA514 CJU → GMP May 25, 12:55 UTCMay 25, 13:25 UTC30m
2026-05-25 JNA429 TAE → CJU May 25, 09:15 UTCMay 25, 09:25 UTC10m
2026-05-25 JNA405 CJJ → CJU May 25, 05:30 UTCMay 25, 05:45 UTC15m
2026-05-25 JNA406 CJU → CJJ May 25, 04:05 UTCMay 25, 04:25 UTC20m
2026-05-25 JNA507 GMP → CJU May 25, 01:55 UTCMay 25, 02:10 UTC15m
2026-05-24 JNA503 GMP → CJU May 24, 21:40 UTCMay 24, 21:50 UTC10m
2026-05-24 JNA514 CJU → GMP May 24, 13:00 UTCMay 24, 13:25 UTC25m
2026-05-24 JNA430 CJU → TAE May 24, 08:05 UTCMay 24, 08:20 UTC15m
2026-05-24 JNA405 CJJ → CJU May 24, 05:35 UTCMay 24, 05:50 UTC15m
2026-05-24 JNA406 CJU → CJJ May 24, 04:05 UTCMay 24, 04:30 UTC25m
2026-05-24 JNA507 GMP → CJU May 24, 01:45 UTCMay 24, 02:10 UTC25m
2026-05-24 JNA504 CJU → GMP May 24, 00:05 UTCMay 24, 00:40 UTC35m
2026-05-23 JNA503 GMP → CJU May 23, 21:50 UTCMay 23, 22:15 UTC25m
2026-05-23 JNA514 CJU → GMP May 23, 12:50 UTCMay 23, 13:25 UTC35m
2026-05-23 JNA430 CJU → TAE May 23, 07:50 UTCMay 23, 08:05 UTC15m
2026-05-23 JNA405 CJJ → CJU May 23, 05:25 UTCMay 23, 05:45 UTC20m
2026-05-23 JNA406 CJU → CJJ May 23, 03:55 UTCMay 23, 04:20 UTC25m
2026-05-23 JNA507 GMP → CJU May 23, 01:50 UTCMay 23, 02:15 UTC25m
2026-05-23 JNA504 CJU → GMP May 23, 00:05 UTCMay 23, 00:40 UTC35m
2026-05-22 JNA503 GMP → CJU May 22, 21:55 UTCMay 22, 22:20 UTC25m
2026-05-22 JNA514 CJU → GMP May 22, 13:10 UTCMay 22, 13:40 UTC30m
2026-05-22 JNA407 CJJ → CJU May 22, 07:45 UTCMay 22, 08:05 UTC20m
2026-05-22 JNA408 CJU → CJJ May 22, 06:10 UTCMay 22, 06:40 UTC30m
2026-05-22 JNA403 CJJ → CJU May 22, 04:00 UTCMay 22, 04:15 UTC15m
2026-05-22 JNA404 CJU → CJJ May 22, 02:05 UTCMay 22, 02:35 UTC30m
2026-05-21 JNA413 CJJ → CJU May 21, 23:55 UTCMay 22, 00:15 UTC20m

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 HL7718 page for operator, model, and routing details .

Mode-S 71BF18 frequently asked

What is Mode-S code 71BF18?
71BF18 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7718.
Where is Mode-S 71BF18 registered?
Mode-S code 71BF18 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 71BF18 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF18, octal 34337430, decimal 7,454,488.
What flights does 71BF18 operate?
Mode-S 71BF18 has broadcast 20 distinct callsigns, including JNA507, JNA406, JNA405, JNA514, JNA504.