Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF34

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

Currently assigned to HL7734 · BOEING 777-200

Hex
71BF34
Octal
34337464
Decimal
7,454,516
Country
KR
Tail
HL7734
Type
B772
No current signal · last broadcast 22h ago
Flights observed
318
Distinct callsigns
18
Country
KR
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S 71BF34.

Country allocation

The ICAO 24-bit address 71BF34 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 - 32 2026-07-13
JNA271 - 32 2026-07-13
JNA733 Jin Air 31 2026-07-13
JNA734 Jin Air 27 2026-07-13
JNA342 - 27 2026-06-26
JNA203 - 22 2026-06-27
JNA341 - 21 2026-06-25
JNA204 - 21 2026-06-28
JNA209 Jin Air 16 2026-06-05
JNA210 Jin Air 14 2026-06-05
JNA212 - 13 2026-07-05
JNA211 - 12 2026-07-05
JNA302 - 10 2026-07-13
JNA301 - 10 2026-07-12
JNA242 Jin Air 9 2026-06-05
JNA241 Jin Air 9 2026-06-04
JNA240 - 6 2026-07-11
JNA239 - 6 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JNA734 TPE → ICN Jul 13, 17:30 UTCJul 13, 19:30 UTC2h 0m
2026-07-13 JNA733 ICN → TPE Jul 13, 14:05 UTCJul 13, 16:05 UTC2h 0m
2026-07-13 JNA272 - Jul 13, 11:10 UTCJul 13, 12:05 UTC55m
2026-07-13 JNA271 - Jul 13, 08:20 UTCJul 13, 09:05 UTC45m
2026-07-13 JNA302 - Jul 13, 03:40 UTCJul 13, 05:55 UTC2h 15m
2026-07-12 JNA301 ICN → CTS Jul 12, 23:55 UTCJul 13, 02:10 UTC2h 15m
2026-07-11 JNA240 KIX → ICN Jul 11, 10:30 UTCJul 11, 11:45 UTC1h 15m
2026-07-11 JNA239 ICN → KIX Jul 11, 07:20 UTCJul 11, 08:45 UTC1h 25m
2026-07-10 JNA240 KIX → ICN Jul 10, 10:30 UTCJul 10, 11:50 UTC1h 20m
2026-07-10 JNA239 ICN → KIX Jul 10, 07:35 UTCJul 10, 09:00 UTC1h 25m
2026-07-06 JNA734 TPE → ICN Jul 6, 17:40 UTCJul 6, 19:40 UTC2h 0m
2026-07-06 JNA733 ICN → TPE Jul 6, 14:00 UTCJul 6, 16:00 UTC2h 0m
2026-07-06 JNA272 - Jul 6, 10:50 UTCJul 6, 12:00 UTC1h 10m
2026-07-06 JNA271 - Jul 6, 08:15 UTCJul 6, 08:55 UTC40m
2026-07-05 JNA212 - Jul 5, 10:30 UTCJul 5, 12:35 UTC2h 5m
2026-07-05 JNA211 ICN → NRT Jul 5, 07:10 UTCJul 5, 09:05 UTC1h 55m
2026-07-03 JNA734 TPE → ICN Jul 3, 17:35 UTCJul 3, 19:35 UTC2h 0m
2026-07-03 JNA733 ICN → TPE Jul 3, 14:10 UTCJul 3, 16:05 UTC1h 55m
2026-07-03 JNA302 CTS → ICN Jul 3, 03:30 UTCJul 3, 06:00 UTC2h 30m
2026-07-02 JNA301 - Jul 2, 23:40 UTCJul 3, 01:50 UTC2h 10m
2026-06-30 JNA302 - Jun 30, 03:25 UTCJun 30, 05:50 UTC2h 25m
2026-06-29 JNA301 ICN → CTS Jun 29, 23:44 UTCJun 30, 01:50 UTC2h 6m
2026-06-29 JNA240 KIX → ICN Jun 29, 10:24 UTCJun 29, 11:45 UTC1h 20m
2026-06-29 JNA239 ICN → KIX Jun 29, 07:30 UTCJun 29, 09:05 UTC1h 35m
2026-06-29 JNA302 - Jun 29, 03:29 UTCJun 29, 05:59 UTC2h 30m
2026-06-28 JNA301 - Jun 28, 23:34 UTCJun 29, 01:44 UTC2h 10m
2026-06-28 JNA212 - Jun 28, 10:55 UTCJun 28, 12:55 UTC2h 0m
2026-06-28 JNA211 ICN → NRT Jun 28, 07:05 UTCJun 28, 09:05 UTC2h 0m
2026-06-28 JNA204 - Jun 28, 03:00 UTCJun 28, 04:55 UTC1h 55m
2026-06-27 JNA203 - Jun 27, 23:14 UTCJun 28, 00:59 UTC1h 45m
2026-06-27 JNA734 TPE → ICN Jun 27, 17:49 UTCJun 27, 19:39 UTC1h 50m
2026-06-27 JNA733 ICN → TPE Jun 27, 16:10 UTCJun 27, 16:30 UTC20m
2026-06-27 JNA733 ICN → TPE Jun 27, 14:20 UTCJun 27, 15:05 UTC45m
2026-06-27 JNA272 - Jun 27, 11:04 UTCJun 27, 12:04 UTC1h 0m
2026-06-27 JNA271 - Jun 27, 08:25 UTCJun 27, 09:09 UTC45m
2026-06-27 JNA302 - Jun 27, 03:40 UTCJun 27, 05:59 UTC2h 20m
2026-06-26 JNA301 ICN → CTS Jun 26, 23:44 UTCJun 27, 01:44 UTC2h 0m
2026-06-26 JNA342 ICN → ICN Jun 26, 03:00 UTCJun 26, 09:05 UTC6h 5m
2026-06-25 JNA734 TPE → ICN Jun 25, 18:19 UTCJun 25, 20:25 UTC2h 5m
2026-06-25 JNA733 ICN → TPE Jun 25, 13:59 UTCJun 25, 15:54 UTC1h 55m
2026-06-25 JNA341 ICN → ICN Jun 25, 01:14 UTCJun 25, 06:40 UTC5h 25m
2026-06-24 JNA342 - Jun 24, 01:14 UTCJun 24, 06:39 UTC5h 25m
2026-06-23 JNA272 - Jun 23, 10:59 UTCJun 23, 11:54 UTC55m
2026-06-23 JNA271 - Jun 23, 08:20 UTCJun 23, 09:05 UTC45m
2026-06-23 JNA302 - Jun 23, 03:25 UTCJun 23, 05:49 UTC2h 25m
2026-06-22 JNA301 ICN → CTS Jun 22, 23:39 UTCJun 23, 01:59 UTC2h 20m
2026-06-22 JNA734 TPE → ICN Jun 22, 17:44 UTCJun 22, 19:44 UTC2h 0m
2026-06-22 JNA733 ICN → TPE Jun 22, 14:10 UTCJun 22, 16:10 UTC2h 0m
2026-06-22 JNA272 - Jun 22, 10:55 UTCJun 22, 11:54 UTC1h 0m
2026-06-22 JNA271 - Jun 22, 08:19 UTCJun 22, 09:04 UTC45m

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 HL7734 page for operator, model, and routing details .

Mode-S 71BF34 frequently asked

What is Mode-S code 71BF34?
71BF34 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7734.
Where is Mode-S 71BF34 registered?
Mode-S code 71BF34 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 71BF34 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF34, octal 34337464, decimal 7,454,516.
What flights does 71BF34 operate?
Mode-S 71BF34 has broadcast 18 distinct callsigns, including JNA272, JNA271, JNA733, JNA734, JNA342.