Apparatus

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sensors Mode-S transponder

71C379

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

Currently assigned to HL8379 · BOEING 737-800

Hex
71C379
Octal
34341571
Decimal
7,455,609
Country
KR
Tail
HL8379
Type
B738
Transponder active on ground
Flights observed
438
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 13:20 UTC

Last known position

Most recent position reported by Mode-S 71C379.

Country allocation

The ICAO 24-bit address 71C379 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
TWB328 - 14 2026-07-18
TWB226 - 13 2026-07-18
TWB225 - 13 2026-07-18
TWB327 - 12 2026-07-18
TWB643 - 9 2026-06-21
TWB908 - 7 2026-07-08
TWB639 - 7 2026-06-30
TWB264 Tway Airlines 7 2026-06-12
TWB263 - 7 2026-06-12
TWB907 - 6 2026-07-08
TWB706 - 6 2026-07-21
TWB703 - 6 2026-07-20
TWB689 Tway Airlines 6 2026-07-26
TWB252 - 6 2026-06-19
TWB902 - 5 2026-07-09
TWB850 - 5 2026-07-05
TWB715 - 5 2026-07-08
TWB690 Tway Airlines 5 2026-07-26
TWB667 Tway Airlines 5 2026-07-20
TWB644 - 5 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB812 - Jul 26, 12:50 UTCJul 26, 13:20 UTC30m
2026-07-26 TWB811 - Jul 26, 10:50 UTCJul 26, 11:05 UTC15m
2026-07-26 TWB806 CJU → TAE Jul 26, 09:25 UTCJul 26, 09:45 UTC20m
2026-07-26 TWB690 KHH → CJU Jul 26, 05:50 UTCJul 26, 06:30 UTC40m
2026-07-26 TWB689 CJU → KHH Jul 26, 03:05 UTCJul 26, 04:00 UTC55m
2026-07-25 TWB843 CJJ → CJU Jul 25, 23:45 UTCJul 26, 00:10 UTC25m
2026-07-25 TWB686 YNJ → CJJ Jul 25, 08:15 UTCJul 25, 08:40 UTC25m
2026-07-25 TWB685 CJJ → YNJ Jul 25, 03:00 UTCJul 25, 03:45 UTC45m
2026-07-25 TWB862 CJU → CJJ Jul 25, 00:40 UTCJul 25, 01:15 UTC35m
2026-07-24 TWB761 ICN → KHH Jul 24, 11:50 UTCJul 24, 12:25 UTC35m
2026-07-24 TWB718 CJU → GMP Jul 24, 03:45 UTCJul 24, 04:30 UTC45m
2026-07-24 TWB809 TAE → CJU Jul 24, 01:50 UTCJul 24, 02:00 UTC10m
2026-07-23 TWB013 - Jul 23, 13:35 UTCJul 23, 23:50 UTC10h 15m
2026-07-23 TWB670 RMQ → ICN Jul 23, 09:15 UTCJul 23, 11:30 UTC2h 15m
2026-07-23 TWB669 ICN → RMQ Jul 23, 05:25 UTCJul 23, 07:40 UTC2h 15m
2026-07-22 TWB014 DAD → ICN Jul 22, 12:35 UTCJul 22, 23:35 UTC11h 0m
2026-07-22 TWB332 KIX → CJU Jul 22, 03:25 UTCJul 22, 04:20 UTC55m
2026-07-22 TWB319 PUS → KIX Jul 22, 00:30 UTCJul 22, 01:35 UTC1h 5m
2026-07-21 TWB042 - Jul 21, 22:15 UTCJul 21, 22:40 UTC25m
2026-07-21 TWB041 - Jul 21, 14:05 UTCJul 21, 21:00 UTC6h 55m
2026-07-21 TWB041 - Jul 21, 12:30 UTCJul 21, 12:45 UTC15m
2026-07-21 TWB927 GMP → PUS Jul 21, 10:10 UTCJul 21, 10:50 UTC40m
2026-07-21 TWB926 PUS → GMP Jul 21, 08:00 UTCJul 21, 08:45 UTC45m
2026-07-21 TWB925 GMP → PUS Jul 21, 06:15 UTCJul 21, 07:00 UTC45m
2026-07-21 TWB924 PUS → GMP Jul 21, 04:05 UTCJul 21, 04:50 UTC45m
2026-07-21 TWB923 GMP → PUS Jul 21, 02:15 UTCJul 21, 03:00 UTC45m
2026-07-21 TWB706 - Jul 21, 00:15 UTCJul 21, 01:00 UTC45m
2026-07-20 TWB703 - Jul 20, 22:15 UTCJul 20, 22:50 UTC35m
2026-07-20 - GMP → GMP Jul 20, 15:35 UTCJul 20, 15:55 UTC20m
2026-07-20 TWB732 - Jul 20, 11:30 UTCJul 20, 12:15 UTC45m
2026-07-20 TWB731 GMP → CJU Jul 20, 09:35 UTCJul 20, 10:10 UTC35m
2026-07-20 TWB668 TSA → GMP Jul 20, 06:10 UTCJul 20, 08:20 UTC2h 10m
2026-07-20 TWB667 GMP → TSA Jul 20, 04:20 UTCJul 20, 04:45 UTC25m
2026-07-20 TWB667 GMP → TSA Jul 20, 02:40 UTCJul 20, 03:20 UTC40m
2026-07-20 TWB706 - Jul 20, 00:35 UTCJul 20, 01:15 UTC40m
2026-07-19 TWB703 - Jul 19, 22:35 UTCJul 19, 23:10 UTC35m
2026-07-19 TWB690 - Jul 19, 05:50 UTCJul 19, 06:35 UTC45m
2026-07-19 TWB689 - Jul 19, 03:25 UTCJul 19, 04:25 UTC1h 0m
2026-07-18 TWB226 - Jul 18, 10:30 UTCJul 18, 11:20 UTC50m
2026-07-18 TWB225 - Jul 18, 07:25 UTCJul 18, 08:00 UTC35m
2026-07-18 TWB328 - Jul 18, 06:05 UTCJul 18, 06:20 UTC15m
2026-07-18 TWB328 - Jul 18, 05:05 UTCJul 18, 05:35 UTC30m
2026-07-18 TWB327 - Jul 18, 02:09 UTCJul 18, 03:35 UTC1h 26m
2026-07-17 TWB046 - Jul 17, 23:20 UTCJul 17, 23:55 UTC35m
2026-07-17 TWB045 - Jul 17, 13:40 UTCJul 17, 22:05 UTC8h 25m
2026-07-17 TWB226 - Jul 17, 10:40 UTCJul 17, 11:35 UTC55m
2026-07-17 TWB225 - Jul 17, 08:10 UTCJul 17, 08:45 UTC35m
2026-07-17 TWB328 - Jul 17, 04:54 UTCJul 17, 06:00 UTC1h 5m
2026-07-17 TWB327 - Jul 17, 02:05 UTCJul 17, 03:14 UTC1h 10m
2026-07-16 TWB046 - Jul 16, 12:55 UTCJul 16, 23:29 UTC10h 35m

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 HL8379 page for operator, model, and routing details .

Mode-S 71C379 frequently asked

What is Mode-S code 71C379?
71C379 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8379.
Where is Mode-S 71C379 registered?
Mode-S code 71C379 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 71C379 broadcasting right now?
Mode-S 71C379 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C379, octal 34341571, decimal 7,455,609.
What flights does 71C379 operate?
Mode-S 71C379 has broadcast 20 distinct callsigns, including TWB328, TWB226, TWB225, TWB327, TWB643.