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
Broadcasting now · callsign JJA6255 · 18,225 ft
Flights observed
481
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:15 UTC

Current position

71C301 is currently broadcasting. Map zoomed to live position.

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
JJA2202 Jeju Air 14 2026-07-26
JJA1101 Jeju Air 13 2026-07-25
JJA2104 - 12 2026-07-20
JJA2103 Jeju Air 12 2026-07-20
JJA1504 Jeju Air 12 2026-07-19
JJA1503 Jeju Air 12 2026-07-19
JJA1102 Jeju Air 12 2026-07-26
JJA6001 Jeju Air 11 2026-06-04
JJA5203 Jeju Air 11 2026-07-25
JJA1702 Jeju Air 11 2026-07-19
JJA1701 - 11 2026-07-18
JJA8904 - 10 2026-07-12
JJA1611 - 10 2026-07-17
JJA1408 Jeju Air 10 2026-07-22
JJA2201 Jeju Air 9 2026-07-26
JJA1704 - 9 2026-07-18
JJA1703 - 9 2026-07-18
JJA1612 - 9 2026-07-18
JJA1407 - 9 2026-07-01
JJA1303 - 9 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJA2202 HAN → ICN Jul 26, 19:00 UTCJul 26, 22:15 UTC3h 15m
2026-07-26 JJA2202 HAN → ICN Jul 26, 18:05 UTCJul 26, 18:15 UTC10m
2026-07-26 JJA2201 ICN → BKK Jul 26, 12:15 UTCJul 26, 12:35 UTC20m
2026-07-26 JJA8504 - Jul 26, 09:15 UTCJul 26, 09:40 UTC25m
2026-07-26 JJA8503 ICN → WEH Jul 26, 06:55 UTCJul 26, 07:15 UTC20m
2026-07-26 JJA1102 ICN → NRT Jul 26, 03:15 UTCJul 26, 05:20 UTC2h 5m
2026-07-25 JJA1101 NRT → ICN Jul 25, 23:25 UTCJul 26, 01:20 UTC1h 55m
2026-07-25 JJA2604 BKI → ICN Jul 25, 16:35 UTCJul 25, 21:30 UTC4h 55m
2026-07-25 JJA2603 ICN → BKI Jul 25, 10:25 UTCJul 25, 14:55 UTC4h 30m
2026-07-25 JJA5204 UBN → ICN Jul 25, 08:25 UTCJul 25, 08:50 UTC25m
2026-07-25 JJA5203 ICN → UBN Jul 25, 01:25 UTCJul 25, 02:55 UTC1h 30m
2026-07-24 JJA1110 - Jul 24, 11:40 UTCJul 24, 13:40 UTC2h 0m
2026-07-24 JJA1109 NRT → ICN Jul 24, 08:25 UTCJul 24, 10:20 UTC1h 55m
2026-07-24 JJA1472 FUK → ICN Jul 24, 05:00 UTCJul 24, 05:55 UTC55m
2026-07-24 JJA1471 ICN → FUK Jul 24, 00:45 UTCJul 24, 01:40 UTC55m
2026-07-23 JJA2202 HAN → ICN Jul 23, 19:05 UTCJul 23, 22:25 UTC3h 20m
2026-07-23 JJA2202 HAN → ICN Jul 23, 18:05 UTCJul 23, 18:20 UTC15m
2026-07-23 JJA2201 ICN → BKK Jul 23, 16:05 UTCJul 23, 16:15 UTC10m
2026-07-23 JJA2201 ICN → BKK Jul 23, 12:35 UTCJul 23, 13:00 UTC25m
2026-07-23 JJA8504 - Jul 23, 10:15 UTCJul 23, 10:45 UTC30m
2026-07-23 JJA8503 ICN → WEH Jul 23, 07:40 UTCJul 23, 08:00 UTC20m
2026-07-23 JJA6102 TPE → ICN Jul 23, 03:55 UTCJul 23, 06:05 UTC2h 10m
2026-07-23 JJA6101 ICN → TPE Jul 23, 00:25 UTCJul 23, 02:25 UTC2h 0m
2026-07-22 JJA1408 FUK → ICN Jul 22, 11:30 UTCJul 22, 12:30 UTC1h 0m
2026-07-22 JJA1615 ICN → HIJ Jul 22, 03:25 UTCJul 22, 04:35 UTC1h 10m
2026-07-22 JJA1402 FUK → ICN Jul 22, 00:10 UTCJul 22, 01:10 UTC1h 0m
2026-07-21 JJA1401 ICN → FUK Jul 21, 21:50 UTCJul 21, 22:35 UTC45m
2026-07-21 JJA1604 FSZ → ICN Jul 21, 09:25 UTCJul 21, 11:05 UTC1h 40m
2026-07-21 JJA1603 ICN → FSZ Jul 21, 06:15 UTCJul 21, 07:55 UTC1h 40m
2026-07-21 JJA1282 NGO → ICN Jul 21, 02:25 UTCJul 21, 03:50 UTC1h 25m
2026-07-20 JJA1281 ICN → NGO Jul 20, 23:00 UTCJul 21, 00:20 UTC1h 20m
2026-07-20 JJA2104 MNL → ICN Jul 20, 15:45 UTCJul 20, 19:15 UTC3h 30m
2026-07-20 JJA2103 ICN → MNL Jul 20, 10:25 UTCJul 20, 14:05 UTC3h 40m
2026-07-20 JJA5204 - Jul 20, 08:25 UTCJul 20, 08:45 UTC20m
2026-07-20 JJA5203 - Jul 20, 01:20 UTCJul 20, 02:50 UTC1h 30m
2026-07-19 JJA2402 - Jul 19, 22:05 UTCJul 19, 22:45 UTC40m
2026-07-19 JJA2402 - Jul 19, 12:05 UTCJul 19, 21:00 UTC8h 55m
2026-07-19 JJA1504 CTS → ICN Jul 19, 07:05 UTCJul 19, 09:30 UTC2h 25m
2026-07-19 JJA1503 ICN → CTS Jul 19, 03:25 UTCJul 19, 05:40 UTC2h 15m
2026-07-19 JJA1702 MYJ → ICN Jul 19, 00:45 UTCJul 19, 01:55 UTC1h 10m
2026-07-18 JJA1701 - Jul 18, 22:10 UTCJul 18, 23:15 UTC1h 5m
2026-07-18 JJA2104 - Jul 18, 15:50 UTCJul 18, 19:25 UTC3h 35m
2026-07-18 JJA2103 ICN → MNL Jul 18, 10:10 UTCJul 18, 13:45 UTC3h 35m
2026-07-18 JJA1704 - Jul 18, 07:00 UTCJul 18, 08:10 UTC1h 10m
2026-07-18 JJA1703 - Jul 18, 04:25 UTCJul 18, 05:25 UTC1h 0m
2026-07-18 JJA1612 HIJ → ICN Jul 18, 01:34 UTCJul 18, 02:45 UTC1h 10m
2026-07-17 JJA1611 - Jul 17, 22:55 UTCJul 18, 00:10 UTC1h 15m
2026-07-17 JJA1110 - Jul 17, 11:10 UTCJul 17, 13:05 UTC1h 55m
2026-07-17 JJA1109 ICN → NRT Jul 17, 07:40 UTCJul 17, 09:45 UTC2h 5m
2026-07-17 JJA1102 NRT → ICN Jul 17, 02:59 UTCJul 17, 04:54 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 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?
Yes. Mode-S 71C301 is currently airborne.
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 JJA2202, JJA1101, JJA2104, JJA2103, JJA1504.