Apparatus

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sensors Mode-S transponder

71C552

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

Currently assigned to HL8552 · BOEING 737 MAX 8

Hex
71C552
Octal
34342522
Decimal
7,456,082
Country
KR
Tail
HL8552
Type
B38M
No current signal · last broadcast 16m ago
Flights observed
338
Distinct callsigns
18
Country
KR
Last broadcast
16m ago

Last known position

Most recent position reported by Mode-S 71C552.

Country allocation

The ICAO 24-bit address 71C552 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 18 distinct

Callsign Airline Flights Last seen
JJA1306 - 52 2026-07-13
JJA1305 - 50 2026-07-14
JJA5304 - 43 2026-07-11
JJA1201 - 39 2026-07-11
JJA2624 - 37 2026-07-12
JJA1202 - 37 2026-07-11
JJA2623 - 34 2026-07-12
JJA5303 - 15 2026-07-09
JJA1110 - 10 2026-06-29
JJA1109 - 9 2026-06-29
JJA2211 Jeju Air 3 2026-05-29
JJA2212 Jeju Air 2 2026-05-19
JJA8502 Jeju Air 1 2026-06-03
JJA8501 Jeju Air 1 2026-06-03
JJA1474 - 1 2026-04-16
JJA1473 - 1 2026-04-15
JJA1308 Jeju Air 1 2026-05-18
JJA1307 Jeju Air 1 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JJA1305 - Jul 14, 02:00 UTCJul 14, 02:25 UTC25m
2026-07-13 JJA1306 KIX → ICN Jul 13, 04:45 UTCJul 13, 06:10 UTC1h 25m
2026-07-13 JJA1305 ICN → KIX Jul 13, 02:05 UTCJul 13, 03:40 UTC1h 35m
2026-07-12 JJA2624 - Jul 12, 20:50 UTCJul 12, 23:30 UTC2h 40m
2026-07-12 JJA2624 - Jul 12, 17:25 UTCJul 12, 17:35 UTC10m
2026-07-12 JJA2623 - Jul 12, 09:55 UTCJul 12, 15:45 UTC5h 50m
2026-07-11 JJA5304 ICN → ICN Jul 11, 13:35 UTCJul 12, 04:40 UTC15h 5m
2026-07-11 JJA1202 - Jul 11, 03:40 UTCJul 11, 05:01 UTC1h 20m
2026-07-11 JJA1201 - Jul 11, 00:45 UTCJul 11, 02:05 UTC1h 20m
2026-07-10 JJA1306 KIX → ICN Jul 10, 04:40 UTCJul 10, 06:05 UTC1h 25m
2026-07-10 JJA1305 ICN → KIX Jul 10, 02:00 UTCJul 10, 03:30 UTC1h 30m
2026-07-09 JJA5303 ICN → ICN Jul 9, 09:10 UTCJul 10, 00:05 UTC14h 55m
2026-07-09 JJA1202 - Jul 9, 03:55 UTCJul 9, 05:15 UTC1h 20m
2026-07-09 JJA1201 - Jul 9, 00:55 UTCJul 9, 02:15 UTC1h 20m
2026-07-08 JJA5304 ICN → ICN Jul 8, 07:10 UTCJul 8, 22:20 UTC15h 10m
2026-07-08 JJA1202 - Jul 8, 03:40 UTCJul 8, 05:15 UTC1h 35m
2026-07-08 JJA1201 - Jul 8, 00:40 UTCJul 8, 02:00 UTC1h 20m
2026-07-07 JJA5304 ICN → ICN Jul 7, 06:55 UTCJul 7, 21:50 UTC14h 55m
2026-07-07 JJA1202 - Jul 7, 03:45 UTCJul 7, 05:10 UTC1h 25m
2026-07-07 JJA1201 - Jul 7, 01:00 UTCJul 7, 02:20 UTC1h 20m
2026-07-06 JJA1306 KIX → ICN Jul 6, 04:40 UTCJul 6, 06:05 UTC1h 25m
2026-07-06 JJA1305 ICN → KIX Jul 6, 02:05 UTCJul 6, 03:25 UTC1h 20m
2026-07-05 JJA2624 - Jul 5, 22:25 UTCJul 5, 23:05 UTC40m
2026-07-05 JJA2624 - Jul 5, 20:10 UTCJul 5, 21:20 UTC1h 10m
2026-07-05 JJA2624 - Jul 5, 17:05 UTCJul 5, 17:15 UTC10m
2026-07-05 JJA2623 - Jul 5, 15:00 UTCJul 5, 15:25 UTC25m
2026-07-05 JJA2623 - Jul 5, 09:25 UTCJul 5, 12:15 UTC2h 50m
2026-07-05 JJA1306 - Jul 5, 05:20 UTCJul 5, 06:50 UTC1h 30m
2026-07-05 JJA1305 ICN → KIX Jul 5, 02:05 UTCJul 5, 03:35 UTC1h 30m
2026-07-04 JJA2624 - Jul 4, 20:25 UTCJul 4, 23:20 UTC2h 55m
2026-07-04 JJA2623 - Jul 4, 09:40 UTCJul 4, 15:15 UTC5h 35m
2026-07-04 JJA1306 KIX → ICN Jul 4, 04:50 UTCJul 4, 06:15 UTC1h 25m
2026-07-04 JJA1305 ICN → KIX Jul 4, 02:10 UTCJul 4, 03:40 UTC1h 30m
2026-07-03 JJA5304 ICN → ICN Jul 3, 06:55 UTCJul 3, 22:00 UTC15h 5m
2026-07-03 JJA1202 - Jul 3, 03:45 UTCJul 3, 05:20 UTC1h 35m
2026-07-03 JJA1201 - Jul 3, 00:45 UTCJul 3, 02:05 UTC1h 20m
2026-07-02 JJA5304 - Jul 2, 07:00 UTCJul 2, 22:05 UTC15h 5m
2026-07-02 JJA1202 - Jul 2, 03:45 UTCJul 2, 05:15 UTC1h 30m
2026-07-02 JJA1201 - Jul 2, 01:05 UTCJul 2, 02:20 UTC1h 15m
2026-07-01 JJA5304 - Jul 1, 07:00 UTCJul 1, 21:40 UTC14h 40m
2026-07-01 JJA1202 - Jul 1, 03:40 UTCJul 1, 05:10 UTC1h 30m
2026-07-01 JJA1201 - Jul 1, 00:40 UTCJul 1, 02:00 UTC1h 20m
2026-06-30 JJA1306 KIX → ICN Jun 30, 04:40 UTCJun 30, 06:00 UTC1h 20m
2026-06-30 JJA1305 ICN → KIX Jun 30, 01:55 UTCJun 30, 03:20 UTC1h 25m
2026-06-29 JJA1110 - Jun 29, 11:20 UTCJun 29, 13:14 UTC1h 55m
2026-06-29 JJA1109 - Jun 29, 07:34 UTCJun 29, 09:29 UTC1h 55m
2026-06-29 JJA1306 - Jun 29, 04:50 UTCJun 29, 06:14 UTC1h 25m
2026-06-29 JJA1305 ICN → KIX Jun 29, 02:09 UTCJun 29, 03:29 UTC1h 20m
2026-06-28 JJA2624 - Jun 28, 20:34 UTCJun 28, 23:34 UTC3h 0m
2026-06-28 JJA2624 - Jun 28, 17:19 UTCJun 28, 17:30 UTC10m

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 HL8552 page for operator, model, and routing details .

Mode-S 71C552 frequently asked

What is Mode-S code 71C552?
71C552 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8552.
Where is Mode-S 71C552 registered?
Mode-S code 71C552 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 71C552 broadcasting right now?
No active broadcast right now. Last signal was 16m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C552, octal 34342522, decimal 7,456,082.
What flights does 71C552 operate?
Mode-S 71C552 has broadcast 18 distinct callsigns, including JJA1306, JJA1305, JJA5304, JJA1201, JJA2624.