Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 12:00 UTC
Flights observed
413
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:00 UTC

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 - 11 2026-06-19
JJA103 - 9 2026-06-18
JJA117 Jeju Air 8 2026-05-12
JJA140 Jeju Air 7 2026-06-06
JJA1328 Jeju Air 7 2026-06-08
JJA1326 Jeju Air 7 2026-06-08
JJA1325 Jeju Air 7 2026-06-07
JJA131 Jeju Air 7 2026-05-11
JJA122 Jeju Air 7 2026-05-11
JJA108 Jeju Air 7 2026-05-11
JJA6256 - 6 2026-06-20
JJA6124 Jeju Air 6 2026-05-30
JJA227 Jeju Air 6 2026-05-23
JJA137 Jeju Air 6 2026-06-06
JJA1327 Jeju Air 6 2026-06-08
JJA123 - 6 2026-06-19
JJA6123 Jeju Air 5 2026-05-30
JJA301 - 5 2026-06-19
JJA228 Jeju Air 5 2026-05-23
JJA155 - 5 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJA1395 ICN → KIX Jul 26, 10:35 UTCJul 26, 11:55 UTC1h 20m
2026-07-26 JJA1704 MYJ → ICN Jul 26, 06:50 UTCJul 26, 08:05 UTC1h 15m
2026-07-26 JJA1703 ICN → MYJ Jul 26, 04:30 UTCJul 26, 05:35 UTC1h 5m
2026-07-26 JJA1612 HIJ → ICN Jul 26, 01:40 UTCJul 26, 02:50 UTC1h 10m
2026-07-25 JJA1611 ICN → HIJ Jul 25, 23:00 UTCJul 26, 00:05 UTC1h 5m
2026-07-25 JJA1602 FSZ → ICN Jul 25, 01:10 UTCJul 25, 02:45 UTC1h 35m
2026-07-24 JJA1601 ICN → FSZ Jul 24, 22:20 UTCJul 24, 23:50 UTC1h 30m
2026-07-24 JJA1504 CTS → ICN Jul 24, 07:10 UTCJul 24, 09:30 UTC2h 20m
2026-07-24 JJA1503 ICN → CTS Jul 24, 03:25 UTCJul 24, 05:45 UTC2h 20m
2026-07-24 JJA1702 MYJ → ICN Jul 24, 00:40 UTCJul 24, 01:50 UTC1h 10m
2026-07-23 JJA1701 ICN → MYJ Jul 23, 22:15 UTCJul 23, 23:20 UTC1h 5m
2026-07-23 JJA1106 NRT → ICN Jul 23, 08:30 UTCJul 23, 10:30 UTC2h 0m
2026-07-23 JJA1105 NRT → ICN Jul 23, 04:55 UTCJul 23, 07:00 UTC2h 5m
2026-07-23 JJA1282 NGO → ICN Jul 23, 01:40 UTCJul 23, 03:15 UTC1h 35m
2026-07-22 JJA1281 ICN → NGO Jul 22, 22:55 UTCJul 23, 00:15 UTC1h 20m
2026-07-22 JJA1602 FSZ → ICN Jul 22, 01:50 UTCJul 22, 03:30 UTC1h 40m
2026-07-21 JJA1601 ICN → FSZ Jul 21, 22:15 UTCJul 21, 23:50 UTC1h 35m
2026-07-21 JJA1172 NRT → ICN Jul 21, 09:00 UTCJul 21, 11:00 UTC2h 0m
2026-07-21 JJA1171 ICN → NRT Jul 21, 05:10 UTCJul 21, 07:15 UTC2h 5m
2026-07-21 JJA1612 HIJ → ICN Jul 21, 01:50 UTCJul 21, 03:00 UTC1h 10m
2026-07-20 JJA1611 ICN → HIJ Jul 20, 23:10 UTCJul 21, 00:20 UTC1h 10m
2026-07-20 JJA1504 CTS → ICN Jul 20, 07:10 UTCJul 20, 09:35 UTC2h 25m
2026-07-20 JJA1503 ICN → CTS Jul 20, 03:25 UTCJul 20, 05:50 UTC2h 25m
2026-07-20 JJA1396 KIX → ICN Jul 20, 00:25 UTCJul 20, 01:45 UTC1h 20m
2026-07-19 JJA1395 ICN → KIX Jul 19, 10:35 UTCJul 19, 12:05 UTC1h 30m
2026-07-19 JJA1616 HIJ → ICN Jul 19, 05:45 UTCJul 19, 06:55 UTC1h 10m
2026-07-19 JJA1615 ICN → HIJ Jul 19, 03:10 UTCJul 19, 04:20 UTC1h 10m
2026-07-19 JJA1396 KIX → ICN Jul 19, 00:05 UTCJul 19, 01:25 UTC1h 20m
2026-07-18 JJA1395 ICN → KIX Jul 18, 10:35 UTCJul 18, 12:05 UTC1h 30m
2026-07-18 JJA1622 UKB → ICN Jul 18, 06:55 UTCJul 18, 08:20 UTC1h 25m
2026-07-18 JJA1621 ICN → UKB Jul 18, 04:25 UTCJul 18, 05:50 UTC1h 25m
2026-07-18 JJA1602 - Jul 18, 01:10 UTCJul 18, 02:45 UTC1h 35m
2026-07-17 JJA1601 ICN → FSZ Jul 17, 22:10 UTCJul 17, 23:45 UTC1h 35m
2026-07-17 JJA1504 - Jul 17, 07:14 UTCJul 17, 09:35 UTC2h 20m
2026-07-17 JJA1503 - Jul 17, 03:25 UTCJul 17, 05:45 UTC2h 20m
2026-07-17 JJA1396 KIX → ICN Jul 17, 00:10 UTCJul 17, 01:29 UTC1h 20m
2026-07-16 JJA1395 ICN → KIX Jul 16, 10:35 UTCJul 16, 11:54 UTC1h 20m
2026-07-16 JJA1704 - Jul 16, 06:50 UTCJul 16, 08:05 UTC1h 15m
2026-07-16 JJA1703 - Jul 16, 04:25 UTCJul 16, 05:30 UTC1h 5m
2026-07-15 JJA338M - Jul 15, 19:30 UTCJul 15, 19:55 UTC25m
2026-06-26 JJA337M - Jun 26, 21:15 UTCJun 26, 21:30 UTC15m
2026-06-26 JJA1172 NRT → ICN Jun 26, 08:54 UTCJun 26, 10:50 UTC1h 55m
2026-06-26 JJA1171 ICN → NRT Jun 26, 05:10 UTCJun 26, 07:20 UTC2h 10m
2026-06-25 JJA8904 - Jun 25, 12:25 UTCJun 25, 12:44 UTC20m
2026-06-25 JJA8903 - Jun 25, 07:09 UTCJun 25, 07:25 UTC15m
2026-06-25 JJA1102 NRT → ICN Jun 25, 02:59 UTCJun 25, 05:05 UTC2h 5m
2026-06-24 JJA1101 NRT → ICN Jun 24, 23:20 UTCJun 25, 01:09 UTC1h 50m
2026-06-24 JJA1308 KIX → ICN Jun 24, 10:59 UTCJun 24, 12:25 UTC1h 25m
2026-06-24 JJA1307 ICN → KIX Jun 24, 08:30 UTCJun 24, 09:49 UTC1h 20m
2026-06-24 JJA8906 - Jun 24, 05:05 UTCJun 24, 05:34 UTC30m

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 Jul 26, 12:00 UTC.
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, JJA103, JJA117, JJA140, JJA1328.