Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C594

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

Currently assigned to HL8594 · BOEING 737 MAX 8

Hex
71C594
Octal
34342624
Decimal
7,456,148
Country
KR
Tail
HL8594
Type
B38M
No current signal · last broadcast 42m ago
Flights observed
420
Distinct callsigns
20
Country
KR
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 71C594.

Country allocation

The ICAO 24-bit address 71C594 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
JJA6101 - 30 2026-07-07
JJA6102 - 29 2026-07-07
JJA1203 - 20 2026-06-29
JJA1204 - 15 2026-06-29
JJA1802 - 14 2026-07-06
JJA1404 - 13 2026-06-29
JJA1301 - 13 2026-07-05
JJA8401 - 12 2026-07-12
JJA6013 - 12 2026-06-26
JJA1403 - 12 2026-06-29
JJA1302 - 12 2026-07-06
JJA1105 - 12 2026-07-13
JJA8402 - 11 2026-07-13
JJA1307 - 11 2026-07-07
JJA1108 - 11 2026-07-10
JJA1107 - 11 2026-07-10
JJA8502 - 10 2026-07-10
JJA2316 Jeju Air 10 2026-07-04
JJA1308 - 10 2026-07-07
JJA1106 - 10 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JJA2211 - Jul 14, 00:35 UTCJul 14, 03:00 UTC2h 25m
2026-07-13 JJA2108 - Jul 13, 17:55 UTCJul 13, 21:30 UTC3h 35m
2026-07-13 JJA2107 - Jul 13, 13:00 UTCJul 13, 16:15 UTC3h 15m
2026-07-13 JJA1106 NRT → ICN Jul 13, 08:15 UTCJul 13, 10:10 UTC1h 55m
2026-07-13 JJA1105 ICN → NRT Jul 13, 04:45 UTCJul 13, 06:55 UTC2h 10m
2026-07-13 JJA8402 - Jul 13, 02:55 UTCJul 13, 03:20 UTC25m
2026-07-12 JJA8401 - Jul 12, 23:30 UTCJul 12, 23:45 UTC15m
2026-07-12 JJA2315 ICN → ICN Jul 12, 09:10 UTCJul 12, 20:50 UTC11h 40m
2026-07-12 JJA1176 NRT → ICN Jul 12, 04:35 UTCJul 12, 06:35 UTC2h 0m
2026-07-12 JJA1175 ICN → NRT Jul 12, 01:10 UTCJul 12, 03:05 UTC1h 55m
2026-07-11 JJA8402 - Jul 11, 03:05 UTCJul 11, 03:30 UTC25m
2026-07-10 JJA8401 - Jul 10, 23:35 UTCJul 10, 23:55 UTC20m
2026-07-10 JJA1108 NRT → ICN Jul 10, 10:25 UTCJul 10, 12:35 UTC2h 10m
2026-07-10 JJA1107 ICN → NRT Jul 10, 06:45 UTCJul 10, 08:50 UTC2h 5m
2026-07-10 JJA8502 - Jul 10, 04:55 UTCJul 10, 05:15 UTC20m
2026-07-10 JJA8501 - Jul 10, 02:05 UTCJul 10, 02:25 UTC20m
2026-07-09 JJA2624 - Jul 9, 22:00 UTCJul 10, 00:35 UTC2h 35m
2026-07-09 JJA2624 - Jul 9, 18:25 UTCJul 9, 18:35 UTC10m
2026-07-09 JJA2623 - Jul 9, 11:05 UTCJul 9, 16:40 UTC5h 35m
2026-07-09 JJA1176 NRT → ICN Jul 9, 05:25 UTCJul 9, 07:30 UTC2h 5m
2026-07-09 JJA1175 ICN → NRT Jul 9, 01:10 UTCJul 9, 03:15 UTC2h 5m
2026-07-08 JJA2315 ICN → ICN Jul 8, 08:35 UTCJul 8, 11:25 UTC2h 50m
2026-07-08 JJA1176 NRT → ICN Jul 8, 04:40 UTCJul 8, 06:40 UTC2h 0m
2026-07-08 JJA1175 ICN → NRT Jul 8, 01:15 UTCJul 8, 03:15 UTC2h 0m
2026-07-07 JJA1308 KIX → ICN Jul 7, 11:15 UTCJul 7, 12:40 UTC1h 25m
2026-07-07 JJA1307 ICN → KIX Jul 7, 08:10 UTCJul 7, 09:35 UTC1h 25m
2026-07-07 JJA6102 TPE → ICN Jul 7, 04:05 UTCJul 7, 06:15 UTC2h 10m
2026-07-07 JJA6101 ICN → TPE Jul 7, 00:35 UTCJul 7, 02:40 UTC2h 5m
2026-07-06 JJA1802 - Jul 6, 08:00 UTCJul 6, 09:55 UTC1h 55m
2026-07-06 JJA1801 - Jul 6, 04:40 UTCJul 6, 06:25 UTC1h 45m
2026-07-06 JJA1302 KIX → ICN Jul 6, 01:20 UTCJul 6, 02:45 UTC1h 25m
2026-07-05 JJA1301 ICN → KIX Jul 5, 22:25 UTCJul 5, 23:50 UTC1h 25m
2026-07-05 JJA1308 KIX → ICN Jul 5, 11:10 UTCJul 5, 12:40 UTC1h 30m
2026-07-05 JJA1307 ICN → KIX Jul 5, 08:35 UTCJul 5, 10:00 UTC1h 25m
2026-07-05 JJA6102 TPE → ICN Jul 5, 04:45 UTCJul 5, 06:55 UTC2h 10m
2026-07-05 JJA6101 - Jul 5, 02:50 UTCJul 5, 03:10 UTC20m
2026-07-05 JJA6101 - Jul 5, 01:00 UTCJul 5, 01:45 UTC45m
2026-07-04 JJA2316 PQC → ICN Jul 4, 09:10 UTCJul 4, 20:50 UTC11h 40m
2026-07-04 JJA1176 NRT → ICN Jul 4, 04:45 UTCJul 4, 06:50 UTC2h 5m
2026-07-04 JJA1175 ICN → NRT Jul 4, 01:05 UTCJul 4, 02:50 UTC1h 45m
2026-07-03 JJA2108 - Jul 3, 17:55 UTCJul 3, 21:15 UTC3h 20m
2026-07-03 JJA2107 - Jul 3, 13:00 UTCJul 3, 16:15 UTC3h 15m
2026-07-03 JJA1106 NRT → ICN Jul 3, 08:30 UTCJul 3, 10:35 UTC2h 5m
2026-07-03 JJA1105 - Jul 3, 04:35 UTCJul 3, 06:40 UTC2h 5m
2026-07-03 JJA8402 - Jul 3, 03:00 UTCJul 3, 03:15 UTC15m
2026-07-02 JJA8401 - Jul 2, 23:30 UTCJul 2, 23:50 UTC20m
2026-07-02 JJA2516 - Jul 2, 16:10 UTCJul 2, 21:25 UTC5h 15m
2026-07-02 JJA2515 - Jul 2, 09:25 UTCJul 2, 14:20 UTC4h 55m
2026-07-02 JJA1104 NRT → ICN Jul 2, 05:25 UTCJul 2, 07:35 UTC2h 10m
2026-07-02 JJA1103 ICN → NRT Jul 2, 01:50 UTCJul 2, 03:45 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 HL8594 page for operator, model, and routing details .

Mode-S 71C594 frequently asked

What is Mode-S code 71C594?
71C594 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8594.
Where is Mode-S 71C594 registered?
Mode-S code 71C594 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 71C594 broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C594, octal 34342624, decimal 7,456,148.
What flights does 71C594 operate?
Mode-S 71C594 has broadcast 20 distinct callsigns, including JJA6101, JJA6102, JJA1203, JJA1204, JJA1802.