Apparatus

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sensors Mode-S transponder

71C301

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

Currently assigned to HL8301 · BOEING 737-800

Hex
71C301
Octal
34341401
Decimal
7,455,489
Country
KR
Tail
HL8301
Type
B738
No current signal · last broadcast 42m ago
Flights observed
418
Distinct callsigns
20
Country
KR
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 71C301.

Country allocation

The ICAO 24-bit address 71C301 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
JJA6001 Jeju Air 11 2026-06-04
JJA1504 - 11 2026-06-22
JJA1503 - 11 2026-06-22
JJA8904 - 10 2026-07-12
JJA2202 Jeju Air 10 2026-06-06
JJA2104 - 10 2026-07-05
JJA2103 - 10 2026-07-05
JJA1702 - 10 2026-07-07
JJA1701 - 10 2026-07-06
JJA1101 Jeju Air 10 2026-07-04
JJA5203 - 9 2026-07-09
JJA1408 - 9 2026-07-01
JJA1407 - 9 2026-07-01
JJA1303 - 9 2026-07-14
JJA1175 - 9 2026-06-30
JJA1102 - 9 2026-07-05
JJA8903 - 8 2026-07-12
JJA6002 Jeju Air 8 2026-06-04
JJA1704 - 8 2026-07-07
JJA1703 - 8 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JJA1303 ICN → KIX Jul 14, 00:25 UTCJul 14, 01:45 UTC1h 20m
2026-07-13 JJA1172 NRT → ICN Jul 13, 08:40 UTCJul 13, 10:35 UTC1h 55m
2026-07-13 JJA1171 - Jul 13, 05:01 UTCJul 13, 07:05 UTC2h 5m
2026-07-13 JJA1282 - Jul 13, 01:45 UTCJul 13, 03:10 UTC1h 25m
2026-07-12 JJA1281 - Jul 12, 22:55 UTCJul 13, 00:20 UTC1h 25m
2026-07-12 JJA8904 - Jul 12, 12:01 UTCJul 12, 12:20 UTC20m
2026-07-12 JJA8903 - Jul 12, 07:20 UTCJul 12, 07:45 UTC25m
2026-07-12 JJA1892 - Jul 12, 04:10 UTCJul 12, 05:55 UTC1h 45m
2026-07-12 JJA1891 - Jul 12, 02:05 UTCJul 12, 02:25 UTC20m
2026-07-12 JJA1891 - Jul 12, 00:40 UTCJul 12, 01:15 UTC35m
2026-07-11 JJA2126 - Jul 11, 13:35 UTCJul 11, 23:15 UTC9h 40m
2026-07-11 JJA1172 NRT → ICN Jul 11, 08:40 UTCJul 11, 10:35 UTC1h 55m
2026-07-11 JJA1171 ICN → NRT Jul 11, 04:55 UTCJul 11, 06:55 UTC2h 0m
2026-07-11 JJA1282 - Jul 11, 01:40 UTCJul 11, 03:05 UTC1h 25m
2026-07-10 JJA1281 - Jul 10, 22:50 UTCJul 11, 00:10 UTC1h 20m
2026-07-10 JJA8904 - Jul 10, 12:10 UTCJul 10, 12:30 UTC20m
2026-07-10 JJA8903 - Jul 10, 07:15 UTCJul 10, 07:40 UTC25m
2026-07-10 JJA8906 - Jul 10, 05:10 UTCJul 10, 05:30 UTC20m
2026-07-10 JJA8905 - Jul 10, 00:20 UTCJul 10, 00:40 UTC20m
2026-07-09 JJA5204 - Jul 9, 07:55 UTCJul 9, 08:20 UTC25m
2026-07-09 JJA5203 - Jul 9, 02:35 UTCJul 9, 07:05 UTC4h 30m
2026-07-09 JJA5203 - Jul 9, 01:20 UTCJul 9, 01:35 UTC15m
2026-07-08 JJA2604 BKI → ICN Jul 8, 17:00 UTCJul 8, 22:00 UTC5h 0m
2026-07-08 JJA2603 ICN → BKI Jul 8, 10:35 UTCJul 8, 15:20 UTC4h 45m
2026-07-08 JJA8906 - Jul 8, 05:10 UTCJul 8, 05:30 UTC20m
2026-07-08 JJA8905 - Jul 8, 00:20 UTCJul 8, 01:15 UTC55m
2026-07-07 JJA1704 - Jul 7, 06:55 UTCJul 7, 08:00 UTC1h 5m
2026-07-07 JJA1703 - Jul 7, 04:25 UTCJul 7, 05:25 UTC1h 0m
2026-07-07 JJA1702 - Jul 7, 00:40 UTCJul 7, 01:55 UTC1h 15m
2026-07-06 JJA1701 - Jul 6, 22:15 UTCJul 6, 23:15 UTC1h 0m
2026-07-06 JJA8904 - Jul 6, 12:10 UTCJul 6, 12:25 UTC15m
2026-07-06 JJA8903 - Jul 6, 07:05 UTCJul 6, 07:30 UTC25m
2026-07-06 JJA1304 KIX → ICN Jul 6, 03:10 UTCJul 6, 04:35 UTC1h 25m
2026-07-06 JJA1303 ICN → KIX Jul 6, 00:25 UTCJul 6, 01:45 UTC1h 20m
2026-07-05 JJA2104 MNL → ICN Jul 5, 15:55 UTCJul 5, 19:15 UTC3h 20m
2026-07-05 JJA2103 ICN → MNL Jul 5, 10:35 UTCJul 5, 14:15 UTC3h 40m
2026-07-05 JJA1102 NRT → ICN Jul 5, 03:00 UTCJul 5, 05:10 UTC2h 10m
2026-07-04 JJA1101 NRT → ICN Jul 4, 23:20 UTCJul 5, 01:05 UTC1h 45m
2026-07-04 JJA3212 ICN → ICN Jul 4, 11:35 UTCJul 4, 21:30 UTC9h 55m
2026-07-04 JJA1616 HIJ → ICN Jul 4, 05:45 UTCJul 4, 06:55 UTC1h 10m
2026-07-04 JJA1615 ICN → HIJ Jul 4, 03:10 UTCJul 4, 04:20 UTC1h 10m
2026-07-04 JJA1402 - Jul 4, 00:10 UTCJul 4, 01:15 UTC1h 5m
2026-07-03 JJA1401 - Jul 3, 22:10 UTCJul 3, 22:50 UTC40m
2026-07-03 JJA8904 ICN → ICN Jul 3, 07:25 UTCJul 3, 13:20 UTC5h 55m
2026-07-03 JJA1102 NRT → ICN Jul 3, 02:55 UTCJul 3, 05:00 UTC2h 5m
2026-07-02 JJA1101 NRT → ICN Jul 2, 23:25 UTCJul 3, 01:30 UTC2h 5m
2026-07-02 JJA2604 BKI → ICN Jul 2, 17:00 UTCJul 2, 21:55 UTC4h 55m
2026-07-02 JJA2603 ICN → BKI Jul 2, 10:30 UTCJul 2, 15:25 UTC4h 55m
2026-07-02 JJA1704 - Jul 2, 07:00 UTCJul 2, 08:10 UTC1h 10m
2026-07-02 JJA1703 - Jul 2, 04:35 UTCJul 2, 05:35 UTC1h 0m

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 HL8301 page for operator, model, and routing details .

Mode-S 71C301 frequently asked

What is Mode-S code 71C301?
71C301 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8301.
Where is Mode-S 71C301 registered?
Mode-S code 71C301 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 71C301 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 71C301, octal 34341401, decimal 7,455,489.
What flights does 71C301 operate?
Mode-S 71C301 has broadcast 20 distinct callsigns, including JJA6001, JJA1504, JJA1503, JJA8904, JJA2202.