Apparatus

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sensors Mode-S transponder

71C339

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

Currently assigned to HL8339 · BOEING 737-800

Hex
71C339
Octal
34341471
Decimal
7,455,545
Country
KR
Tail
HL8339
Type
B738
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
475
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S 71C339.

Country allocation

The ICAO 24-bit address 71C339 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
JJA2202 Jeju Air 14 2026-07-25
JJA2104 - 13 2026-07-09
JJA2103 - 13 2026-07-09
JJA1602 Jeju Air 13 2026-07-23
JJA1601 Jeju Air 13 2026-07-22
JJA6001 - 12 2026-07-19
JJA1101 - 12 2026-07-15
JJA1304 Jeju Air 11 2026-07-26
JJA1176 - 11 2026-06-25
JJA2201 Jeju Air 10 2026-07-25
JJA1396 Jeju Air 10 2026-07-18
JJA1395 - 10 2026-07-17
JJA1175 - 10 2026-06-25
JJA1102 - 10 2026-07-16
JJA1701 - 9 2026-07-10
JJA1612 - 9 2026-07-17
JJA1611 - 9 2026-07-16
JJA1504 - 9 2026-07-18
JJA1503 - 9 2026-07-18
JJA1402 - 9 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJA2108 HKG → ICN Jul 26, 17:40 UTCJul 26, 21:20 UTC3h 40m
2026-07-26 JJA2107 ICN → CRK Jul 26, 12:50 UTCJul 26, 16:10 UTC3h 20m
2026-07-26 JJA1604 FSZ → ICN Jul 26, 09:40 UTCJul 26, 11:15 UTC1h 35m
2026-07-26 JJA1603 ICN → FSZ Jul 26, 06:20 UTCJul 26, 07:50 UTC1h 31m
2026-07-26 JJA1304 KIX → ICN Jul 26, 03:05 UTCJul 26, 04:30 UTC1h 25m
2026-07-26 JJA1303 ICN → KIX Jul 26, 00:20 UTCJul 26, 01:35 UTC1h 15m
2026-07-25 JJA2202 HAN → ICN Jul 25, 21:25 UTCJul 25, 21:45 UTC20m
2026-07-25 JJA2202 HAN → ICN Jul 25, 18:05 UTCJul 25, 18:30 UTC25m
2026-07-25 JJA2201 ICN → BKK Jul 25, 12:15 UTCJul 25, 13:00 UTC45m
2026-07-25 JJA1622 UKB → ICN Jul 25, 08:30 UTCJul 25, 09:50 UTC1h 20m
2026-07-25 JJA1621 ICN → UKB Jul 25, 05:50 UTCJul 25, 07:10 UTC1h 20m
2026-07-25 JJA1304 KIX → ICN Jul 25, 03:15 UTCJul 25, 04:35 UTC1h 20m
2026-07-25 JJA1303 ICN → KIX Jul 25, 00:25 UTCJul 25, 01:45 UTC1h 20m
2026-07-24 JJA2174 CRK → ICN Jul 24, 16:45 UTCJul 24, 20:15 UTC3h 30m
2026-07-24 JJA2173 ICN → CRK Jul 24, 11:55 UTCJul 24, 15:25 UTC3h 30m
2026-07-24 JJA8802 SJW → ICN Jul 24, 06:25 UTCJul 24, 06:45 UTC20m
2026-07-24 JJA8801 ICN → SJW Jul 24, 01:50 UTCJul 24, 02:15 UTC25m
2026-07-23 JJA2217 ICN → DAD Jul 23, 12:55 UTCJul 24, 00:05 UTC11h 10m
2026-07-23 JJA1172 NRT → ICN Jul 23, 08:50 UTCJul 23, 10:50 UTC2h 0m
2026-07-23 JJA1171 ICN → NRT Jul 23, 05:25 UTCJul 23, 07:35 UTC2h 10m
2026-07-23 JJA1602 FSZ → ICN Jul 23, 01:20 UTCJul 23, 03:00 UTC1h 40m
2026-07-22 JJA1601 ICN → FSZ Jul 22, 22:25 UTCJul 23, 00:15 UTC1h 50m
2026-07-22 JJA1282 NGO → ICN Jul 22, 02:25 UTCJul 22, 03:55 UTC1h 30m
2026-07-21 JJA1281 ICN → NGO Jul 21, 22:50 UTCJul 22, 00:10 UTC1h 20m
2026-07-21 JJA5276 UBN → ICN Jul 21, 12:55 UTCJul 21, 13:15 UTC20m
2026-07-21 JJA5275 ICN → UBN Jul 21, 06:45 UTCJul 21, 07:00 UTC15m
2026-07-21 JJA5275 ICN → UBN Jul 21, 05:25 UTCJul 21, 05:50 UTC25m
2026-07-21 JJA1602 FSZ → ICN Jul 21, 01:35 UTCJul 21, 03:15 UTC1h 40m
2026-07-20 JJA1601 ICN → FSZ Jul 20, 22:30 UTCJul 21, 00:05 UTC1h 35m
2026-07-20 JJA8904 YNJ → ICN Jul 20, 07:20 UTCJul 20, 12:40 UTC5h 20m
2026-07-20 JJA1304 KIX → ICN Jul 20, 04:00 UTCJul 20, 05:25 UTC1h 25m
2026-07-20 JJA1303 ICN → KIX Jul 20, 00:20 UTCJul 20, 01:45 UTC1h 25m
2026-07-19 JJA2202 - Jul 19, 19:10 UTCJul 19, 22:30 UTC3h 20m
2026-07-19 JJA2201 ICN → BKK Jul 19, 12:10 UTCJul 19, 12:40 UTC30m
2026-07-19 TWB762 - Jul 19, 10:05 UTCJul 19, 10:45 UTC40m
2026-07-19 JJA6002 - Jul 19, 06:15 UTCJul 19, 09:25 UTC3h 10m
2026-07-19 JJA6001 - Jul 19, 01:10 UTCJul 19, 04:20 UTC3h 10m
2026-07-18 TWB843 - Jul 18, 23:40 UTCJul 19, 00:10 UTC30m
2026-07-18 JJA2402 ICN → ICN Jul 18, 12:05 UTCJul 18, 22:45 UTC10h 40m
2026-07-18 JJA1504 - Jul 18, 07:05 UTCJul 18, 09:35 UTC2h 30m
2026-07-18 JJA1503 - Jul 18, 03:20 UTCJul 18, 05:40 UTC2h 20m
2026-07-18 JJA1396 KIX → ICN Jul 18, 00:10 UTCJul 18, 01:25 UTC1h 15m
2026-07-17 JJA1395 ICN → KIX Jul 17, 10:35 UTCJul 17, 12:04 UTC1h 30m
2026-07-17 JJA1704 - Jul 17, 07:00 UTCJul 17, 08:04 UTC1h 5m
2026-07-17 JJA1703 - Jul 17, 04:29 UTCJul 17, 05:30 UTC1h 0m
2026-07-17 JJA1612 - Jul 17, 01:45 UTCJul 17, 02:50 UTC1h 5m
2026-07-16 JJA1611 - Jul 16, 22:59 UTCJul 16, 23:59 UTC1h 0m
2026-07-16 JJA1110 NRT → ICN Jul 16, 11:15 UTCJul 16, 13:10 UTC1h 55m
2026-07-16 JJA1109 ICN → NRT Jul 16, 07:40 UTCJul 16, 09:45 UTC2h 5m
2026-07-16 JJA1102 NRT → ICN Jul 16, 02:55 UTCJul 16, 04:50 UTC1h 55m

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 HL8339 page for operator, model, and routing details .

Mode-S 71C339 frequently asked

What is Mode-S code 71C339?
71C339 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8339.
Where is Mode-S 71C339 registered?
Mode-S code 71C339 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 71C339 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C339, octal 34341471, decimal 7,455,545.
What flights does 71C339 operate?
Mode-S 71C339 has broadcast 20 distinct callsigns, including JJA2202, JJA2104, JJA2103, JJA1602, JJA1601.