Apparatus

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sensors Mode-S transponder

71C337

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

Currently assigned to HL8337 · BOEING 737-800

Hex
71C337
Octal
34341467
Decimal
7,455,543
Country
KR
Tail
HL8337
Type
B738
No current signal · last broadcast 1h ago
Flights observed
255
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C337.

Country allocation

The ICAO 24-bit address 71C337 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
JJA114 Jeju Air 9 2026-06-01
JJA117 Jeju Air 8 2026-05-12
JJA131 Jeju Air 7 2026-05-11
JJA122 Jeju Air 7 2026-05-11
JJA108 Jeju Air 7 2026-05-11
JJA103 Jeju Air 7 2026-05-31
JJA6124 Jeju Air 6 2026-05-30
JJA227 Jeju Air 6 2026-05-23
JJA140 Jeju Air 6 2026-05-31
JJA6123 Jeju Air 5 2026-05-30
JJA228 Jeju Air 5 2026-05-23
JJA138 Jeju Air 5 2026-05-23
JJA137 Jeju Air 5 2026-05-31
JJA1328 Jeju Air 5 2026-05-31
JJA1326 Jeju Air 5 2026-05-29
JJA1325 Jeju Air 5 2026-05-30
JJA123 Jeju Air 5 2026-05-27
JJA706 Jeju Air 4 2026-05-10
JJA141 Jeju Air 4 2026-05-06
JJA1327 Jeju Air 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 JJA6151 PUS → TPE Jun 3, 02:15 UTCJun 3, 02:50 UTC35m
2026-06-02 JJA6154 TPE → PUS Jun 2, 18:55 UTCJun 2, 19:10 UTC15m
2026-06-02 JJA6256 KHH → PUS Jun 2, 09:00 UTCJun 2, 14:55 UTC5h 55m
2026-06-02 JJA1152 NRT → PUS Jun 2, 01:40 UTCJun 2, 07:30 UTC5h 50m
2026-06-01 JJA1151 PUS → NRT Jun 1, 23:00 UTCJun 2, 00:10 UTC1h 10m
2026-06-01 JJA1151 PUS → NRT Jun 1, 04:50 UTCJun 2, 00:10 UTC19h 20m
2026-06-01 JJA114 CJU → GMP Jun 1, 03:00 UTCJun 1, 03:35 UTC35m
2026-05-31 JJA103 GMP → CJU May 31, 21:35 UTCMay 31, 22:00 UTC25m
2026-05-31 JJA140 CJU → GMP May 31, 12:45 UTCMay 31, 13:15 UTC30m
2026-05-31 JJA137 GMP → CJU May 31, 10:35 UTCMay 31, 11:00 UTC25m
2026-05-31 JJA1328 KIX → GMP May 31, 08:45 UTCMay 31, 09:10 UTC25m
2026-05-30 JJA1325 GMP → KIX May 30, 23:20 UTCMay 31, 00:40 UTC1h 20m
2026-05-30 JJA140 CJU → GMP May 30, 12:40 UTCMay 30, 13:15 UTC35m
2026-05-30 JJA137 GMP → CJU May 30, 10:30 UTCMay 30, 10:55 UTC25m
2026-05-30 JJA6124 KHH → GMP May 30, 06:55 UTCMay 30, 07:35 UTC40m
2026-05-30 JJA6124 KHH → GMP May 30, 05:00 UTCMay 30, 05:45 UTC45m
2026-05-30 JJA6123 GMP → KHH May 30, 00:55 UTCMay 30, 03:20 UTC2h 25m
2026-05-29 JJA1328 KIX → GMP May 29, 07:45 UTCMay 29, 09:15 UTC1h 30m
2026-05-29 JJA1327 GMP → KIX May 29, 05:05 UTCMay 29, 06:20 UTC1h 15m
2026-05-29 JJA1326 KIX → GMP May 29, 02:05 UTCMay 29, 03:35 UTC1h 30m
2026-05-28 JJA1325 GMP → KIX May 28, 23:20 UTCMay 29, 00:35 UTC1h 15m
2026-05-28 JJA130 CJU → GMP May 28, 09:15 UTCMay 28, 09:45 UTC30m
2026-05-28 JJA119 GMP → CJU May 28, 03:45 UTCMay 28, 04:10 UTC25m
2026-05-28 JJA106 CJU → GMP May 28, 01:20 UTCMay 28, 01:55 UTC35m
2026-05-27 JJA123 GMP → CJU May 27, 04:39 UTCMay 27, 05:04 UTC25m
2026-05-27 JJA114 CJU → GMP May 27, 02:59 UTCMay 27, 03:34 UTC35m
2026-05-26 JJA103 GMP → CJU May 26, 21:40 UTCMay 26, 22:05 UTC25m
2026-05-26 JJA128 CJU → GMP May 26, 09:25 UTCMay 26, 09:59 UTC35m
2026-05-26 JJA129 GMP → CJU May 26, 06:54 UTCMay 26, 07:24 UTC30m
2026-05-26 JJA120 CJU → GMP May 26, 05:20 UTCMay 26, 05:49 UTC30m
2026-05-26 JJA115 GMP → CJU May 26, 02:55 UTCMay 26, 03:19 UTC25m
2026-05-25 JJA134 CJU → GMP May 25, 11:40 UTCMay 25, 12:10 UTC30m
2026-05-25 JJA135 GMP → CJU May 25, 09:20 UTCMay 25, 09:45 UTC25m
2026-05-25 JJA126 CJU → GMP May 25, 07:55 UTCMay 25, 08:25 UTC30m
2026-05-25 JJA125 GMP → CJU May 25, 05:35 UTCMay 25, 06:00 UTC25m
2026-05-25 JJA114 CJU → GMP May 25, 03:05 UTCMay 25, 03:40 UTC35m
2026-05-24 JJA103 GMP → CJU May 24, 21:25 UTCMay 24, 21:50 UTC25m
2026-05-24 JJA140 CJU → GMP May 24, 12:50 UTCMay 24, 13:15 UTC25m
2026-05-24 JJJA137 - May 24, 10:35 UTCMay 24, 11:00 UTC25m
2026-05-24 JJA1328 KIX → GMP May 24, 07:35 UTCMay 24, 08:55 UTC1h 20m
2026-05-24 JJA1327 GMP → KIX May 24, 05:05 UTCMay 24, 06:25 UTC1h 20m
2026-05-24 JJA1326 KIX → GMP May 24, 02:10 UTCMay 24, 03:25 UTC1h 15m
2026-05-23 JJA1325 GMP → KIX May 23, 23:10 UTCMay 24, 00:20 UTC1h 10m
2026-05-23 JJA138 CJU → GMP May 23, 12:35 UTCMay 23, 13:05 UTC30m
2026-05-23 JJA227 CJJ → CJU May 23, 10:30 UTCMay 23, 10:50 UTC20m
2026-05-23 JJA228 CJU → CJJ May 23, 09:00 UTCMay 23, 09:25 UTC25m
2026-05-23 JJA109 GMP → CJU May 23, 00:10 UTCMay 23, 00:35 UTC25m
2026-05-22 JJA134 CJU → GMP May 22, 12:05 UTCMay 22, 12:40 UTC35m
2026-05-22 JJA135 GMP → CJU May 22, 09:45 UTCMay 22, 10:15 UTC30m
2026-05-22 JJA126 CJU → GMP May 22, 08:15 UTCMay 22, 08:50 UTC35m

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 HL8337 page for operator, model, and routing details .

Mode-S 71C337 frequently asked

What is Mode-S code 71C337?
71C337 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8337.
Where is Mode-S 71C337 registered?
Mode-S code 71C337 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 71C337 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C337, octal 34341467, decimal 7,455,543.
What flights does 71C337 operate?
Mode-S 71C337 has broadcast 20 distinct callsigns, including JJA114, JJA117, JJA131, JJA122, JJA108.