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 1h ago
Flights observed
418
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

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
JJA2104 - 13 2026-07-09
JJA2103 - 13 2026-07-09
JJA6001 - 11 2026-07-12
JJA2202 - 11 2026-07-11
JJA1602 - 11 2026-07-14
JJA1601 - 11 2026-07-13
JJA1176 - 11 2026-06-25
JJA1101 Jeju Air 11 2026-06-29
JJA1175 - 10 2026-06-25
JJA1701 - 9 2026-07-10
JJA1402 - 9 2026-07-09
JJA1401 - 9 2026-07-08
JJA1396 - 9 2026-07-13
JJA1395 - 9 2026-07-12
JJA1102 - 9 2026-06-30
JJA2201 - 8 2026-07-11
JJA1702 - 8 2026-07-11
JJA1612 - 8 2026-07-01
JJA1611 - 8 2026-06-30
JJA1504 - 8 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JJA1602 - Jul 14, 01:20 UTCJul 14, 02:10 UTC50m
2026-07-13 JJA1601 - Jul 13, 22:20 UTCJul 13, 23:55 UTC1h 35m
2026-07-13 JJA1504 - Jul 13, 07:10 UTCJul 13, 09:35 UTC2h 25m
2026-07-13 JJA1503 - Jul 13, 03:30 UTCJul 13, 05:55 UTC2h 25m
2026-07-13 JJA1396 KIX → ICN Jul 13, 00:10 UTCJul 13, 01:35 UTC1h 25m
2026-07-12 JJA1395 - Jul 12, 10:35 UTCJul 12, 12:01 UTC1h 25m
2026-07-12 JJA6002 - Jul 12, 06:05 UTCJul 12, 09:05 UTC3h 0m
2026-07-12 JJA6001 - Jul 12, 03:50 UTCJul 12, 04:15 UTC25m
2026-07-12 JJA6001 - Jul 12, 01:05 UTCJul 12, 03:20 UTC2h 15m
2026-07-11 JJA2202 - Jul 11, 22:35 UTCJul 11, 22:55 UTC20m
2026-07-11 JJA2202 - Jul 11, 19:05 UTCJul 11, 19:15 UTC10m
2026-07-11 JJA2201 - Jul 11, 13:45 UTCJul 11, 14:00 UTC15m
2026-07-11 JJA1504 - Jul 11, 07:10 UTCJul 11, 09:30 UTC2h 20m
2026-07-11 JJA1503 - Jul 11, 03:25 UTCJul 11, 05:45 UTC2h 20m
2026-07-11 JJA1702 - Jul 11, 00:25 UTCJul 11, 01:40 UTC1h 15m
2026-07-10 JJA1701 - Jul 10, 22:10 UTCJul 10, 23:10 UTC1h 0m
2026-07-10 JJA5286 - Jul 10, 12:00 UTCJul 10, 12:15 UTC15m
2026-07-10 JJA5285 - Jul 10, 05:20 UTCJul 10, 06:50 UTC1h 30m
2026-07-10 JJA1282 - Jul 10, 01:55 UTCJul 10, 03:35 UTC1h 40m
2026-07-09 JJA1281 - Jul 9, 22:50 UTCJul 10, 00:10 UTC1h 20m
2026-07-09 JJA2104 - Jul 9, 15:50 UTCJul 9, 19:15 UTC3h 25m
2026-07-09 JJA2103 ICN → MNL Jul 9, 10:35 UTCJul 9, 14:15 UTC3h 40m
2026-07-09 JJA1616 HIJ → ICN Jul 9, 06:00 UTCJul 9, 07:10 UTC1h 10m
2026-07-09 JJA1615 ICN → HIJ Jul 9, 03:10 UTCJul 9, 04:20 UTC1h 10m
2026-07-09 JJA1402 - Jul 9, 00:10 UTCJul 9, 01:15 UTC1h 5m
2026-07-08 JJA1401 - Jul 8, 22:00 UTCJul 8, 22:45 UTC45m
2026-07-08 JJA2104 - Jul 8, 15:50 UTCJul 8, 19:20 UTC3h 30m
2026-07-08 JJA2103 - Jul 8, 10:30 UTCJul 8, 14:10 UTC3h 40m
2026-07-08 JJA1704 - Jul 8, 06:55 UTCJul 8, 08:15 UTC1h 20m
2026-07-08 JJA1703 - Jul 8, 04:30 UTCJul 8, 05:30 UTC1h 0m
2026-07-08 JJA1602 - Jul 8, 01:00 UTCJul 8, 02:40 UTC1h 40m
2026-07-07 JJA1601 ICN → FSZ Jul 7, 22:15 UTCJul 7, 23:50 UTC1h 35m
2026-07-07 JJA1622 UKB → ICN Jul 7, 06:55 UTCJul 7, 08:15 UTC1h 20m
2026-07-07 JJA1621 ICN → UKB Jul 7, 04:30 UTCJul 7, 05:50 UTC1h 20m
2026-07-07 JJA1396 KIX → ICN Jul 7, 00:10 UTCJul 7, 01:35 UTC1h 25m
2026-07-06 JJA1395 ICN → KIX Jul 6, 10:35 UTCJul 6, 11:50 UTC1h 15m
2026-07-06 JJA1622 UKB → ICN Jul 6, 07:05 UTCJul 6, 08:35 UTC1h 30m
2026-07-06 JJA1621 ICN → UKB Jul 6, 04:50 UTCJul 6, 06:10 UTC1h 20m
2026-07-06 JJA1702 - Jul 6, 00:45 UTCJul 6, 02:00 UTC1h 15m
2026-07-05 JJA1701 - Jul 5, 22:15 UTCJul 5, 23:15 UTC1h 0m
2026-07-05 JJA8904 - Jul 5, 12:10 UTCJul 5, 12:30 UTC20m
2026-07-05 JJA8903 - Jul 5, 07:10 UTCJul 5, 07:35 UTC25m
2026-07-05 JJA1304 KIX → ICN Jul 5, 03:05 UTCJul 5, 04:35 UTC1h 30m
2026-07-05 JJA1303 ICN → KIX Jul 5, 00:15 UTCJul 5, 01:30 UTC1h 15m
2026-07-04 JJA2202 - Jul 4, 19:00 UTCJul 4, 22:10 UTC3h 10m
2026-07-04 JJA2202 - Jul 4, 18:00 UTCJul 4, 18:15 UTC15m
2026-07-04 JJA2201 - Jul 4, 12:10 UTCJul 4, 16:10 UTC4h 0m
2026-07-04 JJA1504 - Jul 4, 07:15 UTCJul 4, 09:40 UTC2h 25m
2026-07-04 JJA1503 - Jul 4, 03:30 UTCJul 4, 06:10 UTC2h 40m
2026-07-04 JJA1396 KIX → ICN Jul 4, 00:10 UTCJul 4, 01:40 UTC1h 30m

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 1h ago.
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, JJA6001, JJA2202, JJA1602.