Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Broadcasting now · callsign JJA1602 · 36,000 ft
Flights observed
225
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Current position

71C339 is currently broadcasting. Map zoomed to live position.

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
JJA2104 Jeju Air 10 2026-05-25
JJA2103 Jeju Air 10 2026-05-25
JJA1402 Jeju Air 8 2026-05-17
JJA1401 Jeju Air 8 2026-05-16
JJA1101 Jeju Air 7 2026-05-10
JJA1701 Jeju Air 6 2026-05-27
JJA1102 Jeju Air 6 2026-05-11
JJA1702 Jeju Air 5 2026-05-28
JJA1616 Jeju Air 5 2026-05-23
JJA1615 Jeju Air 5 2026-05-23
JJA1471 Jeju Air 5 2026-05-17
JJA1304 Jeju Air 5 2026-05-19
JJA2604 Jeju Air 4 2026-05-21
JJA2603 Jeju Air 4 2026-05-21
JJA2202 Jeju Air 4 2026-05-28
JJA1704 Jeju Air 4 2026-05-21
JJA1703 Jeju Air 4 2026-05-21
JJA1612 Jeju Air 4 2026-05-27
JJA1611 Jeju Air 4 2026-05-26
JJA1603 Jeju Air 4 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 JJA1601 ICN → FSZ May 29, 22:25 UTCMay 29, 23:45 UTC1h 20m
2026-05-29 JJA1176 NRT → ICN May 29, 05:00 UTCMay 29, 07:15 UTC2h 15m
2026-05-29 JJA1175 NRT → PUS May 29, 01:15 UTCMay 29, 03:10 UTC1h 55m
2026-05-28 JJA2202 HAN → ICN May 28, 18:00 UTCMay 28, 22:05 UTC4h 5m
2026-05-28 JJA2201 ICN → BKK May 28, 12:00 UTCMay 28, 15:45 UTC3h 45m
2026-05-28 JJA1504 CTS → ICN May 28, 07:10 UTCMay 28, 09:45 UTC2h 35m
2026-05-28 JJA1503 ICN → CTS May 28, 03:20 UTCMay 28, 05:35 UTC2h 15m
2026-05-28 JJA1702 MYJ → ICN May 28, 00:35 UTCMay 28, 01:45 UTC1h 10m
2026-05-27 JJA1701 ICN → MYJ May 27, 22:15 UTCMay 27, 23:10 UTC55m
2026-05-27 JJA1172 NRT → ICN May 27, 08:45 UTCMay 27, 10:50 UTC2h 5m
2026-05-27 JJA1171 ICN → NRT May 27, 04:55 UTCMay 27, 06:55 UTC2h 0m
2026-05-27 JJA1612 HIJ → ICN May 27, 01:44 UTCMay 27, 02:49 UTC1h 5m
2026-05-26 JJA1611 ICN → HIJ May 26, 22:59 UTCMay 27, 00:04 UTC1h 5m
2026-05-26 JJA5204 UBN → ICN May 26, 07:59 UTCMay 26, 08:19 UTC20m
2026-05-26 JJA5203 ICN → UBN May 26, 02:39 UTCMay 26, 02:55 UTC15m
2026-05-26 JJA5203 ICN → UBN May 26, 01:20 UTCMay 26, 01:34 UTC15m
2026-05-25 JJA2104 MNL → ICN May 25, 15:55 UTCMay 25, 19:25 UTC3h 29m
2026-05-25 JJA2103 ICN → MNL May 25, 10:25 UTCMay 25, 13:55 UTC3h 30m
2026-05-25 JJA8802 SJW → ICN May 25, 06:00 UTCMay 25, 06:25 UTC25m
2026-05-24 JJA2104 MNL → ICN May 24, 15:55 UTCMay 24, 19:25 UTC3h 30m
2026-05-24 JJA2103 ICN → MNL May 24, 10:15 UTCMay 24, 14:00 UTC3h 45m
2026-05-24 JJA1176 NRT → ICN May 24, 04:40 UTCMay 24, 06:45 UTC2h 5m
2026-05-24 JJA1175 NRT → PUS May 24, 01:05 UTCMay 24, 02:55 UTC1h 50m
2026-05-23 JJA8611 ICN → KWL May 23, 13:35 UTCMay 23, 21:30 UTC7h 56m
2026-05-23 JJA1408 FUK → ICN May 23, 11:00 UTCMay 23, 12:20 UTC1h 20m
2026-05-23 JJA1407 ICN → FUK May 23, 08:25 UTCMay 23, 08:55 UTC30m
2026-05-23 JJA1616 HIJ → ICN May 23, 05:45 UTCMay 23, 07:00 UTC1h 15m
2026-05-23 JJA1615 ICN → HIJ May 23, 03:05 UTCMay 23, 04:30 UTC1h 25m
2026-05-23 JJA1396 KIX → ICN May 23, 00:10 UTCMay 23, 01:35 UTC1h 25m
2026-05-22 JJA1395 ICN → KIX May 22, 10:40 UTCMay 22, 11:55 UTC1h 15m
2026-05-22 JJA8802 SJW → ICN May 22, 05:50 UTCMay 22, 06:15 UTC25m
2026-05-22 JJA8801 ICN → SJW May 22, 01:35 UTCMay 22, 01:55 UTC20m
2026-05-21 JJA2604 BKI → ICN May 21, 16:25 UTCMay 21, 21:05 UTC4h 40m
2026-05-21 JJA2603 ICN → BKI May 21, 10:25 UTCMay 21, 15:10 UTC4h 45m
2026-05-21 JJA1704 MYJ → ICN May 21, 07:05 UTCMay 21, 08:15 UTC1h 10m
2026-05-21 JJA1703 ICN → MYJ May 21, 04:25 UTCMay 21, 05:25 UTC1h 0m
2026-05-21 JJA1612 HIJ → ICN May 21, 01:35 UTCMay 21, 02:50 UTC1h 15m
2026-05-20 JJA1611 ICN → HIJ May 20, 23:05 UTCMay 21, 00:10 UTC1h 5m
2026-05-20 JJA1172 NRT → ICN May 20, 08:35 UTCMay 20, 10:35 UTC2h 0m
2026-05-20 JJA1171 ICN → NRT May 20, 05:00 UTCMay 20, 07:00 UTC2h 0m
2026-05-20 JJA1612 HIJ → ICN May 20, 01:30 UTCMay 20, 02:40 UTC1h 10m
2026-05-19 JJA1611 ICN → HIJ May 19, 23:05 UTCMay 20, 00:05 UTC1h 0m
2026-05-19 JJA1604 FSZ → ICN May 19, 09:20 UTCMay 19, 10:55 UTC1h 35m
2026-05-19 JJA1603 ICN → FSZ May 19, 06:20 UTCMay 19, 07:55 UTC1h 35m
2026-05-19 JJA1304 KIX → ICN May 19, 03:10 UTCMay 19, 04:25 UTC1h 15m
2026-05-19 JJA1303 ICN → KIX May 19, 00:15 UTCMay 19, 01:35 UTC1h 20m
2026-05-18 JJA2104 MNL → ICN May 18, 15:45 UTCMay 18, 19:25 UTC3h 39m
2026-05-18 JJA2103 ICN → MNL May 18, 10:15 UTCMay 18, 14:05 UTC3h 50m
2026-05-18 JJA1704 MYJ → ICN May 18, 07:00 UTCMay 18, 08:05 UTC1h 5m
2026-05-18 JJA1703 ICN → MYJ May 18, 04:20 UTCMay 18, 05:20 UTC1h 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 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?
Yes. Mode-S 71C339 is currently airborne.
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 JJA2104, JJA2103, JJA1402, JJA1401, JJA1101.