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 2h ago
Flights observed
217
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

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
JJA2108 Jeju Air 31 2026-05-28
JJA2107 Jeju Air 31 2026-05-28
JJA2212 Jeju Air 13 2026-05-27
JJA1876 Jeju Air 13 2026-05-27
JJA1392 Jeju Air 12 2026-05-18
JJA1875 Jeju Air 11 2026-05-20
JJA1394 Jeju Air 11 2026-05-18
JJA2211 Jeju Air 10 2026-05-30
JJA1393 Jeju Air 9 2026-05-18
JJA1391 Jeju Air 9 2026-05-17
JJA1175 Jeju Air 7 2026-04-30
JJA1110 - 7 2026-05-22
JJA1109 Jeju Air 7 2026-05-22
JJA8504 - 5 2026-05-28
JJA8503 Jeju Air 5 2026-05-28
JJA1176 Jeju Air 5 2026-04-30
JJA1306 Jeju Air 4 2026-05-29
JJA1305 Jeju Air 4 2026-05-29
JJA6013 Jeju Air 3 2026-04-17
JJA1473 Jeju Air 3 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JJA2211 ICN → DAD May 30, 00:40 UTCMay 30, 03:20 UTC2h 40m
2026-05-29 JJA1306 KIX → ICN May 29, 04:45 UTCMay 29, 06:20 UTC1h 35m
2026-05-29 JJA1305 ICN → KIX May 29, 02:15 UTCMay 29, 03:35 UTC1h 20m
2026-05-28 JJA2108 HKG → ICN May 28, 17:50 UTCMay 28, 21:25 UTC3h 35m
2026-05-28 JJA2107 ICN → CRK May 28, 12:55 UTCMay 28, 16:10 UTC3h 15m
2026-05-28 JJA8504 - May 28, 09:15 UTCMay 28, 09:40 UTC25m
2026-05-28 JJA8503 ICN → WEH May 28, 06:45 UTCMay 28, 07:00 UTC15m
2026-05-27 JJA1876 OKA → ICN May 27, 23:40 UTCMay 28, 05:20 UTC5h 40m
2026-05-27 JJA2108 HKG → ICN May 27, 18:00 UTCMay 27, 21:30 UTC3h 30m
2026-05-27 JJA2107 ICN → CRK May 27, 13:05 UTCMay 27, 16:30 UTC3h 25m
2026-05-27 JJA2212 DAD → ICN May 27, 00:44 UTCMay 27, 10:50 UTC10h 6m
2026-05-26 JJA1306 KIX → ICN May 26, 05:05 UTCMay 26, 06:29 UTC1h 25m
2026-05-26 JJA1305 ICN → KIX May 26, 02:29 UTCMay 26, 03:50 UTC1h 20m
2026-05-25 JJA2108 HKG → ICN May 25, 17:50 UTCMay 25, 21:19 UTC3h 30m
2026-05-25 JJA2107 ICN → CRK May 25, 12:45 UTCMay 25, 16:00 UTC3h 15m
2026-05-25 JJA2212 DAD → ICN May 25, 02:05 UTCMay 25, 10:35 UTC8h 30m
2026-05-24 JJA2108 HKG → ICN May 24, 18:00 UTCMay 24, 21:40 UTC3h 40m
2026-05-24 JJA2107 ICN → CRK May 24, 12:50 UTCMay 24, 16:15 UTC3h 25m
2026-05-24 JJA2211 ICN → DAD May 24, 00:25 UTCMay 24, 10:50 UTC10h 25m
2026-05-23 JJA2212 DAD → ICN May 23, 01:30 UTCMay 23, 11:25 UTC9h 55m
2026-05-22 JJA1110 NRT → ICN May 22, 11:15 UTCMay 22, 13:15 UTC2h 0m
2026-05-22 JJA1109 NRT → ICN May 22, 07:35 UTCMay 22, 09:40 UTC2h 5m
2026-05-21 JJA1876 OKA → ICN May 21, 23:35 UTCMay 22, 05:40 UTC6h 5m
2026-05-21 JJA2108 HKG → ICN May 21, 17:55 UTCMay 21, 21:35 UTC3h 40m
2026-05-21 JJA2107 ICN → CRK May 21, 12:50 UTCMay 21, 16:20 UTC3h 30m
2026-05-21 JJA2107 ICN → CRK May 21, 12:35 UTCMay 21, 12:40 UTC5m
2026-05-21 JJA8504 - May 21, 10:15 UTCMay 21, 10:40 UTC25m
2026-05-21 JJA8503 ICN → WEH May 21, 07:40 UTCMay 21, 07:55 UTC15m
2026-05-21 JJA1876 OKA → ICN May 21, 05:25 UTCMay 21, 06:05 UTC40m
2026-05-20 JJA1875 ICN → OKA May 20, 23:55 UTCMay 21, 01:25 UTC1h 30m
2026-05-20 - ICN → ICN May 20, 23:35 UTCMay 20, 23:40 UTC5m
2026-05-20 JJA2212 DAD → ICN May 20, 00:35 UTCMay 20, 10:40 UTC10h 6m
2026-05-19 JJA1514 HKD → ICN May 19, 08:20 UTCMay 19, 10:35 UTC2h 15m
2026-05-19 JJA1513 ICN → HKD May 19, 04:55 UTCMay 19, 07:00 UTC2h 5m
2026-05-18 JJA1473 ICN → FUK May 18, 23:30 UTCMay 19, 03:00 UTC3h 30m
2026-05-18 JJA2108 HKG → ICN May 18, 17:40 UTCMay 18, 21:20 UTC3h 39m
2026-05-18 JJA2107 ICN → CRK May 18, 13:00 UTCMay 18, 16:05 UTC3h 5m
2026-05-18 JJA1394 KIX → ICN May 18, 08:05 UTCMay 18, 09:25 UTC1h 20m
2026-05-18 JJA1393 ICN → KIX May 18, 05:20 UTCMay 18, 06:50 UTC1h 30m
2026-05-18 JJA1392 KIX → ICN May 18, 02:00 UTCMay 18, 03:20 UTC1h 20m
2026-05-17 JJA1391 ICN → KIX May 17, 23:05 UTCMay 18, 00:30 UTC1h 25m
2026-05-17 JJA1110 NRT → ICN May 17, 11:01 UTCMay 17, 12:50 UTC1h 50m
2026-05-17 JJA1109 NRT → ICN May 17, 07:40 UTCMay 17, 09:45 UTC2h 5m
2026-05-17 JJA1876 OKA → ICN May 17, 03:30 UTCMay 17, 05:20 UTC1h 50m
2026-05-16 JJA1875 ICN → OKA May 16, 23:40 UTCMay 17, 01:25 UTC1h 45m
2026-05-16 JJA2108 HKG → ICN May 16, 17:45 UTCMay 16, 21:10 UTC3h 25m
2026-05-16 JJA2107 ICN → CRK May 16, 12:55 UTCMay 16, 16:05 UTC3h 10m
2026-05-16 JJA1394 KIX → ICN May 16, 08:11 UTCMay 16, 09:25 UTC1h 15m
2026-05-16 JJA1393 ICN → KIX May 16, 05:15 UTCMay 16, 06:50 UTC1h 36m
2026-05-16 JJA1392 KIX → ICN May 16, 02:05 UTCMay 16, 03:20 UTC1h 15m

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 2h ago.
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 JJA2108, JJA2107, JJA2212, JJA1876, JJA1392.