Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF43

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

Currently assigned to HL7743 · BOEING 777-200

Hex
71BF43
Octal
34337503
Decimal
7,454,531
Country
KR
Tail
HL7743
Type
B772
No current signal · last broadcast 20h ago
Flights observed
323
Distinct callsigns
18
Country
KR
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 71BF43.

Country allocation

The ICAO 24-bit address 71BF43 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 18 distinct

Callsign Airline Flights Last seen
JNA272 - 31 2026-07-12
JNA271 - 31 2026-07-12
JNA733 Jin Air 27 2026-07-12
JNA342 - 26 2026-07-13
JNA734 Jin Air 24 2026-07-12
JNA341 - 20 2026-07-13
JNA204 Jin Air 20 2026-06-06
JNA203 Jin Air 19 2026-06-05
JNA212 - 16 2026-07-10
JNA211 - 16 2026-07-10
JNA302 - 15 2026-07-11
JNA301 - 15 2026-07-10
JNA209 Jin Air 14 2026-06-01
JNA242 Jin Air 13 2026-06-01
JNA241 Jin Air 13 2026-05-31
JNA210 Jin Air 13 2026-06-01
JNA240 - 5 2026-07-03
JNA239 - 5 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JNA342 - Jul 13, 04:35 UTCJul 13, 06:20 UTC1h 45m
2026-07-13 JNA341 - Jul 13, 01:10 UTCJul 13, 02:50 UTC1h 40m
2026-07-12 JNA734 TPE → ICN Jul 12, 17:35 UTCJul 12, 19:30 UTC1h 55m
2026-07-12 JNA733 ICN → TPE Jul 12, 14:01 UTCJul 12, 16:01 UTC2h 0m
2026-07-12 JNA272 - Jul 12, 11:01 UTCJul 12, 11:50 UTC50m
2026-07-12 JNA271 - Jul 12, 08:25 UTCJul 12, 09:20 UTC55m
2026-07-12 JNA342 - Jul 12, 04:45 UTCJul 12, 06:35 UTC1h 50m
2026-07-12 JNA341 - Jul 12, 02:30 UTCJul 12, 02:50 UTC20m
2026-07-12 JNA341 - Jul 12, 01:10 UTCJul 12, 01:45 UTC35m
2026-07-11 JNA734 TPE → ICN Jul 11, 19:40 UTCJul 11, 21:40 UTC2h 0m
2026-07-11 JNA733 ICN → TPE Jul 11, 15:30 UTCJul 11, 18:05 UTC2h 35m
2026-07-11 JNA272 - Jul 11, 11:00 UTCJul 11, 11:55 UTC55m
2026-07-11 JNA271 - Jul 11, 08:20 UTCJul 11, 09:00 UTC40m
2026-07-11 JNA302 - Jul 11, 03:50 UTCJul 11, 06:01 UTC2h 10m
2026-07-10 JNA301 ICN → CTS Jul 10, 23:35 UTCJul 11, 01:50 UTC2h 15m
2026-07-10 JNA212 - Jul 10, 10:40 UTCJul 10, 12:40 UTC2h 0m
2026-07-10 JNA211 ICN → NRT Jul 10, 07:05 UTCJul 10, 08:55 UTC1h 50m
2026-07-07 JNA734 TPE → ICN Jul 7, 17:50 UTCJul 7, 19:55 UTC2h 5m
2026-07-07 JNA733 ICN → TPE Jul 7, 14:10 UTCJul 7, 16:05 UTC1h 55m
2026-07-07 JNA302 - Jul 7, 05:20 UTCJul 7, 07:40 UTC2h 20m
2026-07-07 JNA301 - Jul 7, 01:35 UTCJul 7, 03:55 UTC2h 20m
2026-07-06 JNA302 - Jul 6, 03:25 UTCJul 6, 05:55 UTC2h 30m
2026-07-05 JNA301 ICN → CTS Jul 5, 23:40 UTCJul 6, 01:55 UTC2h 15m
2026-07-05 JNA272 - Jul 5, 10:55 UTCJul 5, 11:55 UTC1h 0m
2026-07-05 JNA271 - Jul 5, 08:20 UTCJul 5, 09:00 UTC40m
2026-07-05 JNA302 - Jul 5, 03:30 UTCJul 5, 06:05 UTC2h 35m
2026-07-04 JNA301 ICN → CTS Jul 4, 23:55 UTCJul 5, 02:00 UTC2h 5m
2026-07-04 JNA734 TPE → ICN Jul 4, 17:40 UTCJul 4, 19:40 UTC2h 0m
2026-07-04 JNA733 ICN → TPE Jul 4, 14:15 UTCJul 4, 16:15 UTC2h 0m
2026-07-04 JNA302 - Jul 4, 03:30 UTCJul 4, 05:55 UTC2h 25m
2026-07-03 JNA301 - Jul 3, 23:40 UTCJul 4, 01:50 UTC2h 10m
2026-07-03 JNA240 - Jul 3, 10:25 UTCJul 3, 11:45 UTC1h 20m
2026-07-03 JNA239 ICN → KIX Jul 3, 07:30 UTCJul 3, 08:50 UTC1h 20m
2026-07-02 JNA302 - Jul 2, 03:25 UTCJul 2, 06:00 UTC2h 35m
2026-07-01 JNA301 - Jul 1, 23:35 UTCJul 2, 01:45 UTC2h 10m
2026-07-01 JNA302 - Jul 1, 03:20 UTCJul 1, 05:40 UTC2h 20m
2026-06-30 JNA301 ICN → CTS Jun 30, 23:40 UTCJul 1, 01:45 UTC2h 5m
2026-06-29 JNA212 - Jun 29, 10:29 UTCJun 29, 12:24 UTC1h 55m
2026-06-29 JNA211 ICN → NRT Jun 29, 07:15 UTCJun 29, 09:05 UTC1h 50m
2026-06-28 JNA240 KIX → ICN Jun 28, 10:35 UTCJun 28, 11:50 UTC1h 15m
2026-06-28 JNA239 ICN → KIX Jun 28, 07:40 UTCJun 28, 09:05 UTC1h 25m
2026-06-28 JNA302 - Jun 28, 03:25 UTCJun 28, 05:55 UTC2h 30m
2026-06-27 JNA301 ICN → CTS Jun 27, 23:45 UTCJun 28, 01:44 UTC2h 0m
2026-06-27 JNA341 ICN → ICN Jun 27, 01:39 UTCJun 27, 06:50 UTC5h 10m
2026-06-26 JNA240 - Jun 26, 10:55 UTCJun 26, 12:14 UTC1h 20m
2026-06-26 JNA239 ICN → KIX Jun 26, 07:39 UTCJun 26, 09:05 UTC1h 25m
2026-06-25 JNA302 - Jun 25, 03:34 UTCJun 25, 06:09 UTC2h 35m
2026-06-24 JNA301 ICN → CTS Jun 24, 23:40 UTCJun 25, 01:54 UTC2h 15m
2026-06-24 JNA734 TPE → ICN Jun 24, 17:50 UTCJun 24, 19:49 UTC2h 0m
2026-06-24 JNA733 ICN → TPE Jun 24, 14:00 UTCJun 24, 15:59 UTC2h 0m

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 HL7743 page for operator, model, and routing details .

Mode-S 71BF43 frequently asked

What is Mode-S code 71BF43?
71BF43 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7743.
Where is Mode-S 71BF43 registered?
Mode-S code 71BF43 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 71BF43 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF43, octal 34337503, decimal 7,454,531.
What flights does 71BF43 operate?
Mode-S 71BF43 has broadcast 18 distinct callsigns, including JNA272, JNA271, JNA733, JNA342, JNA734.