Apparatus

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sensors Mode-S transponder

71C318

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

Currently assigned to HL8318 · BOEING 737-800

Hex
71C318
Octal
34341430
Decimal
7,455,512
Country
KR
Tail
HL8318
Type
B738
No current signal · last broadcast Jul 26, 20:15 UTC
Flights observed
415
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:15 UTC

Last known position

Most recent position reported by Mode-S 71C318.

Country allocation

The ICAO 24-bit address 71C318 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
JJA8504 - 46 2026-07-19
JJA8503 - 44 2026-07-19
JJA2108 Jeju Air 33 2026-05-31
JJA2107 Jeju Air 33 2026-05-31
JJA1472 Jeju Air 25 2026-06-28
JJA1471 Jeju Air 21 2026-06-28
JJA1394 Jeju Air 19 2026-07-21
JJA1393 Jeju Air 17 2026-07-21
JJA1392 - 17 2026-07-08
JJA2212 Jeju Air 14 2026-05-31
JJA1391 Jeju Air 14 2026-07-07
JJA1876 Jeju Air 13 2026-05-27
JJA1875 Jeju Air 11 2026-05-20
JJA2211 Jeju Air 10 2026-05-30
JJA1175 Jeju Air 7 2026-04-30
JJA1110 - 7 2026-05-22
JJA1109 Jeju Air 7 2026-05-22
JJA1306 - 5 2026-07-11
JJA1305 - 5 2026-07-11
JJA1176 Jeju Air 5 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJA6002 MFM → ICN Jul 26, 17:00 UTCJul 26, 20:15 UTC3h 15m
2026-07-26 JJA6001 ICN → MFM Jul 26, 12:15 UTCJul 26, 14:45 UTC2h 30m
2026-07-25 JJA2516 CNX → ICN Jul 25, 20:25 UTCJul 25, 21:05 UTC40m
2026-07-25 JJA2516 CNX → ICN Jul 25, 16:15 UTCJul 25, 17:30 UTC1h 15m
2026-07-25 JJA2515 ICN → CNX Jul 25, 09:30 UTCJul 25, 14:30 UTC5h 0m
2026-07-23 JJA1204 NGO → ICN Jul 23, 09:15 UTCJul 23, 10:40 UTC1h 25m
2026-07-23 JJA1203 ICN → NGO Jul 23, 06:30 UTCJul 23, 07:50 UTC1h 20m
2026-07-23 JJA1202 NGO → ICN Jul 23, 03:40 UTCJul 23, 05:05 UTC1h 25m
2026-07-23 JJA1201 ICN → NGO Jul 23, 00:55 UTCJul 23, 02:10 UTC1h 15m
2026-07-22 JJA1801 ICN → OKA Jul 22, 04:40 UTCJul 22, 05:15 UTC35m
2026-07-21 JJA1394 KIX → ICN Jul 21, 08:10 UTCJul 21, 09:35 UTC1h 25m
2026-07-21 JJA1393 ICN → KIX Jul 21, 05:35 UTCJul 21, 07:05 UTC1h 30m
2026-07-20 JJA1394 KIX → ICN Jul 20, 08:10 UTCJul 20, 09:30 UTC1h 20m
2026-07-20 JJA1393 ICN → KIX Jul 20, 05:25 UTCJul 20, 07:00 UTC1h 35m
2026-07-19 JJA8504 - Jul 19, 09:45 UTCJul 19, 10:10 UTC25m
2026-07-19 JJA8503 - Jul 19, 07:20 UTCJul 19, 07:40 UTC20m
2026-07-19 JJA1202 NGO → ICN Jul 19, 03:45 UTCJul 19, 05:05 UTC1h 20m
2026-07-19 JJA1201 ICN → NGO Jul 19, 00:40 UTCJul 19, 02:00 UTC1h 20m
2026-07-18 JJA3212 ICN → ICN Jul 18, 11:35 UTCJul 18, 21:25 UTC9h 50m
2026-07-18 JJA1394 KIX → ICN Jul 18, 08:10 UTCJul 18, 09:25 UTC1h 15m
2026-07-18 JJA1393 - Jul 18, 05:15 UTCJul 18, 06:40 UTC1h 25m
2026-07-18 JJA1702 - Jul 18, 00:35 UTCJul 18, 01:39 UTC1h 5m
2026-07-17 JJA1701 - Jul 17, 22:10 UTCJul 17, 23:14 UTC1h 5m
2026-07-17 JJA8504 - Jul 17, 10:00 UTCJul 17, 10:20 UTC20m
2026-07-17 JJA8503 - Jul 17, 07:20 UTCJul 17, 07:35 UTC15m
2026-07-17 JJA1702 - Jul 17, 00:35 UTCJul 17, 01:39 UTC1h 5m
2026-07-16 JJA1701 - Jul 16, 22:10 UTCJul 16, 23:15 UTC1h 5m
2026-07-16 JJA8504 - Jul 16, 09:50 UTCJul 16, 10:15 UTC25m
2026-07-16 JJA8503 - Jul 16, 07:20 UTCJul 16, 07:35 UTC15m
2026-07-16 JJA1304 - Jul 16, 03:15 UTCJul 16, 04:35 UTC1h 20m
2026-07-16 JJA1303 ICN → KIX Jul 16, 00:35 UTCJul 16, 02:00 UTC1h 25m
2026-07-15 JJA8504 - Jul 15, 10:30 UTCJul 15, 10:50 UTC20m
2026-07-15 JJA8503 - Jul 15, 07:20 UTCJul 15, 07:35 UTC15m
2026-07-15 JJA1304 KIX → ICN Jul 15, 04:00 UTCJul 15, 05:20 UTC1h 20m
2026-07-15 JJA1303 ICN → KIX Jul 15, 01:20 UTCJul 15, 02:45 UTC1h 25m
2026-07-14 JJA1704 - Jul 14, 07:10 UTCJul 14, 08:25 UTC1h 15m
2026-07-14 JJA1703 - Jul 14, 04:55 UTCJul 14, 05:55 UTC1h 0m
2026-07-14 JJA1282 - Jul 14, 01:40 UTCJul 14, 03:05 UTC1h 25m
2026-07-13 JJA1281 - Jul 13, 22:45 UTCJul 14, 00:05 UTC1h 20m
2026-07-13 JJA8504 - Jul 13, 09:55 UTCJul 13, 10:15 UTC20m
2026-07-13 JJA8503 - Jul 13, 07:30 UTCJul 13, 07:45 UTC15m
2026-07-12 JJA8504 - Jul 12, 10:35 UTCJul 12, 11:01 UTC25m
2026-07-12 JJA8503 - Jul 12, 08:15 UTCJul 12, 08:30 UTC15m
2026-07-12 JJA8906 - Jul 12, 06:35 UTCJul 12, 06:55 UTC20m
2026-07-12 JJA8905 - Jul 12, 01:50 UTCJul 12, 02:10 UTC20m
2026-07-11 JJA2624 - Jul 11, 21:50 UTCJul 12, 00:20 UTC2h 30m
2026-07-11 JJA2624 - Jul 11, 18:20 UTCJul 11, 18:30 UTC10m
2026-07-11 JJA2623 - Jul 11, 10:15 UTCJul 11, 15:15 UTC5h 0m
2026-07-11 JJA1306 KIX → ICN Jul 11, 04:40 UTCJul 11, 05:55 UTC1h 15m
2026-07-11 JJA1305 ICN → KIX Jul 11, 02:00 UTCJul 11, 03:20 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 HL8318 page for operator, model, and routing details .

Mode-S 71C318 frequently asked

What is Mode-S code 71C318?
71C318 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8318.
Where is Mode-S 71C318 registered?
Mode-S code 71C318 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 71C318 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C318, octal 34341430, decimal 7,455,512.
What flights does 71C318 operate?
Mode-S 71C318 has broadcast 20 distinct callsigns, including JJA8504, JJA8503, JJA2108, JJA2107, JJA1472.