Apparatus

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sensors Mode-S transponder

71C593

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

Currently assigned to HL8593 · BOEING 737 MAX 8

Hex
71C593
Octal
34342623
Decimal
7,456,147
Country
KR
Tail
HL8593
Type
B38M
No current signal · last broadcast 13h ago
Flights observed
210
Distinct callsigns
20
Country
KR
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 71C593.

Country allocation

The ICAO 24-bit address 71C593 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
JJA2661 Jeju Air 13 2026-05-25
JJA1203 Jeju Air 13 2026-05-30
JJA1104 Jeju Air 11 2026-05-29
JJA1154 Jeju Air 10 2026-05-28
JJA2662 Jeju Air 9 2026-05-28
JJA1802 Jeju Air 9 2026-05-19
JJA1153 Jeju Air 9 2026-05-28
JJA1103 Jeju Air 9 2026-05-25
JJA1801 Jeju Air 8 2026-05-19
JJA1204 Jeju Air 8 2026-05-30
JJA1106 Jeju Air 8 2026-05-22
JJA1105 Jeju Air 7 2026-05-22
JJA6101 Jeju Air 6 2026-05-21
JJA2114 Jeju Air 6 2026-05-20
JJA1404 Jeju Air 6 2026-05-01
JJA8402 Jeju Air 5 2026-05-22
JJA8401 Jeju Air 5 2026-05-21
JJA6102 Jeju Air 5 2026-05-21
JJA2516 Jeju Air 5 2026-05-13
JJA2504 Jeju Air 5 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JJA1204 NGO → ICN May 30, 09:15 UTCMay 30, 10:55 UTC1h 40m
2026-05-30 JJA1203 ICN → NGO May 30, 06:20 UTCMay 30, 07:30 UTC1h 10m
2026-05-30 JJA1174 NRT → PUS May 30, 02:10 UTCMay 30, 04:35 UTC2h 25m
2026-05-29 JJA1173 PUS → NRT May 29, 22:35 UTCMay 30, 00:20 UTC1h 45m
2026-05-29 JJA1432 FUK → ICN May 29, 12:35 UTCMay 29, 13:30 UTC55m
2026-05-29 JJA1431 ICN → FUK May 29, 09:45 UTCMay 29, 10:15 UTC30m
2026-05-29 JJA1104 NRT → ICN May 29, 05:40 UTCMay 29, 07:55 UTC2h 15m
2026-05-28 JJA1153 NRT → PUS May 28, 19:50 UTCMay 29, 03:50 UTC8h 0m
2026-05-28 JJA2662 SIN → PUS May 28, 16:45 UTCMay 28, 16:55 UTC10m
2026-05-28 JJA1154 NRT → PUS May 28, 05:30 UTCMay 28, 14:45 UTC9h 15m
2026-05-27 JJA2662 SIN → PUS May 27, 19:50 UTCMay 28, 03:45 UTC7h 55m
2026-05-27 JJA1154 NRT → PUS May 27, 05:19 UTCMay 27, 14:10 UTC8h 51m
2026-05-26 JJA1153 NRT → PUS May 26, 19:50 UTCMay 27, 03:45 UTC7h 55m
2026-05-26 JJA1154 NRT → PUS May 26, 05:25 UTCMay 26, 14:00 UTC8h 35m
2026-05-25 JJA1153 NRT → PUS May 25, 19:44 UTCMay 26, 03:55 UTC8h 10m
2026-05-25 JJA2661 PUS → SIN May 25, 05:35 UTCMay 25, 14:35 UTC9h 0m
2026-05-25 JJA1103 NRT → ICN May 25, 02:00 UTCMay 25, 03:55 UTC1h 55m
2026-05-24 JJA2304 CXR → ICN May 24, 12:45 UTCMay 24, 23:30 UTC10h 45m
2026-05-24 JJA1204 NGO → ICN May 24, 09:10 UTCMay 24, 10:40 UTC1h 30m
2026-05-24 JJA1203 ICN → NGO May 24, 06:30 UTCMay 24, 07:45 UTC1h 15m
2026-05-24 JJA1203 ICN → NGO May 24, 06:15 UTCMay 24, 06:20 UTC5m
2026-05-24 JJA1174 NRT → PUS May 24, 03:35 UTCMay 24, 04:00 UTC25m
2026-05-24 JJA1174 NRT → PUS May 24, 01:55 UTCMay 24, 03:05 UTC1h 10m
2026-05-23 JJA1173 PUS → NRT May 23, 22:35 UTCMay 24, 00:30 UTC1h 55m
2026-05-23 JJA1204 NGO → ICN May 23, 09:15 UTCMay 23, 10:50 UTC1h 35m
2026-05-23 JJA1203 ICN → NGO May 23, 06:20 UTCMay 23, 07:40 UTC1h 20m
2026-05-23 JJA8502 WEH → ICN May 23, 04:20 UTCMay 23, 04:40 UTC20m
2026-05-23 JJA8501 ICN → WEH May 23, 01:50 UTCMay 23, 02:05 UTC15m
2026-05-22 JJA1106 NRT → ICN May 22, 08:15 UTCMay 22, 10:15 UTC2h 0m
2026-05-22 JJA1105 NRT → ICN May 22, 04:40 UTCMay 22, 06:50 UTC2h 10m
2026-05-22 JJA8402 TAO → ICN May 22, 02:45 UTCMay 22, 03:15 UTC30m
2026-05-21 JJA8401 ICN → TAO May 21, 23:30 UTCMay 22, 00:00 UTC30m
2026-05-21 JJA2315 ICN → PQC May 21, 08:35 UTCMay 21, 20:55 UTC12h 20m
2026-05-21 JJA6102 TPE → ICN May 21, 04:15 UTCMay 21, 06:25 UTC2h 10m
2026-05-21 JJA6101 ICN → TPE May 21, 02:20 UTCMay 21, 02:45 UTC25m
2026-05-21 JJA6101 ICN → TPE May 21, 00:35 UTCMay 21, 01:00 UTC25m
2026-05-20 JJA2114 CEB → ICN May 20, 12:20 UTCMay 20, 22:10 UTC9h 50m
2026-05-20 JJA1106 NRT → ICN May 20, 08:15 UTCMay 20, 10:25 UTC2h 10m
2026-05-20 JJA1105 NRT → ICN May 20, 04:45 UTCMay 20, 06:40 UTC1h 55m
2026-05-19 JJA8402 TAO → ICN May 19, 23:30 UTCMay 20, 03:25 UTC3h 55m
2026-05-19 JJA1802 OKA → ICN May 19, 09:15 UTCMay 19, 09:45 UTC30m
2026-05-19 JJA1802 OKA → ICN May 19, 08:00 UTCMay 19, 08:10 UTC10m
2026-05-19 JJA1801 ICN → OKA May 19, 06:10 UTCMay 19, 06:20 UTC10m
2026-05-19 JJA1801 ICN → OKA May 19, 04:40 UTCMay 19, 05:10 UTC30m
2026-05-19 JJA1302 ICN → KIX May 19, 01:10 UTCMay 19, 02:30 UTC1h 20m
2026-05-18 JJA1301 KIX → ICN May 18, 22:20 UTCMay 18, 23:45 UTC1h 25m
2026-05-18 JJA1802 OKA → ICN May 18, 09:20 UTCMay 18, 09:50 UTC30m
2026-05-18 JJA1802 OKA → ICN May 18, 08:01 UTCMay 18, 08:10 UTC10m
2026-05-18 JJA1801 ICN → OKA May 18, 04:40 UTCMay 18, 06:20 UTC1h 40m
2026-05-18 JJA1302 ICN → KIX May 18, 01:20 UTCMay 18, 02:40 UTC1h 20m

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 HL8593 page for operator, model, and routing details .

Mode-S 71C593 frequently asked

What is Mode-S code 71C593?
71C593 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8593.
Where is Mode-S 71C593 registered?
Mode-S code 71C593 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 71C593 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C593, octal 34342623, decimal 7,456,147.
What flights does 71C593 operate?
Mode-S 71C593 has broadcast 20 distinct callsigns, including JJA2661, JJA1203, JJA1104, JJA1154, JJA2662.