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
Broadcasting now · callsign TWB319 · 11,450 ft
Flights observed
195
Distinct callsigns
20
Country
KR
Last broadcast
14h ago

Current position

71C379 is currently broadcasting. Map zoomed to live position.

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
TWB908 Tway Airlines 5 2026-05-14
TWB907 Tway Airlines 5 2026-05-11
TWB639 Tway Airlines 5 2026-05-27
TWB252 Tway Airlines 5 2026-05-22
TWB728 Tway Airlines 4 2026-05-23
TWB702 Tway Airlines 4 2026-05-19
TWB688 Tway Airlines 4 2026-05-14
TWB687 Tway Airlines 4 2026-05-14
TWB927 Tway Airlines 3 2026-05-28
TWB906 Tway Airlines 3 2026-05-11
TWB902 Tway Airlines 3 2026-05-11
TWB736 - 3 2026-05-23
TWB735 Tway Airlines 3 2026-05-23
TWB715 Tway Airlines 3 2026-05-09
TWB707 Tway Airlines 3 2026-05-20
TWB706 - 3 2026-05-24
TWB703 Tway Airlines 3 2026-05-23
TWB690 Tway Airlines 3 2026-05-19
TWB689 Tway Airlines 3 2026-05-19
TWB676 Tway Airlines 3 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TWB676 KHH → PUS May 29, 10:05 UTCMay 29, 10:50 UTC45m
2026-05-28 TWB042 - May 28, 14:20 UTCMay 29, 08:30 UTC18h 10m
2026-05-28 TWB042 - May 28, 14:10 UTCMay 29, 08:30 UTC18h 20m
2026-05-28 TWB927 GMP → PUS May 28, 10:05 UTCMay 28, 10:35 UTC30m
2026-05-28 TWB722 CJU → GMP May 28, 06:35 UTCMay 28, 07:10 UTC35m
2026-05-28 TWB332 KIX → CJU May 28, 03:30 UTCMay 28, 04:05 UTC35m
2026-05-27 TWB640 HKG → PUS May 27, 18:10 UTCMay 28, 01:30 UTC7h 20m
2026-05-27 TWB639 PUS → HKG May 27, 15:25 UTCMay 27, 15:45 UTC20m
2026-05-27 TWB639 PUS → HKG May 27, 14:20 UTCMay 27, 14:55 UTC35m
2026-05-27 TWB322 KIX → PUS May 27, 06:49 UTCMay 27, 07:20 UTC31m
2026-05-27 TWB321 PUS → KIX May 27, 04:34 UTCMay 27, 05:14 UTC40m
2026-05-26 TWB676 KHH → PUS May 26, 09:55 UTCMay 26, 10:39 UTC45m
2026-05-25 TWB640 HKG → PUS May 25, 18:15 UTCMay 26, 08:19 UTC14h 5m
2026-05-25 TWB639 PUS → HKG May 25, 15:30 UTCMay 25, 15:45 UTC15m
2026-05-25 TWB639 PUS → HKG May 25, 14:15 UTCMay 25, 14:55 UTC40m
2026-05-25 TWB927 GMP → PUS May 25, 10:05 UTCMay 25, 10:35 UTC30m
2026-05-25 TWB668 TSA → GMP May 25, 06:05 UTCMay 25, 08:15 UTC2h 10m
2026-05-25 TWB667 GMP → TSA May 25, 02:40 UTCMay 25, 04:40 UTC2h 0m
2026-05-24 TWB734 - May 24, 12:25 UTCMay 24, 12:50 UTC25m
2026-05-24 TWB733 - May 24, 10:15 UTCMay 24, 10:35 UTC20m
2026-05-24 TWB668 TSA → GMP May 24, 06:05 UTCMay 24, 08:10 UTC2h 5m
2026-05-24 TWB667 GMP → TSA May 24, 02:45 UTCMay 24, 04:50 UTC2h 5m
2026-05-24 TWB706 - May 24, 00:20 UTCMay 24, 00:55 UTC35m
2026-05-23 TWB703 GMP → CJU May 23, 22:15 UTCMay 23, 22:40 UTC25m
2026-05-23 TWB736 - May 23, 12:30 UTCMay 23, 13:00 UTC30m
2026-05-23 TWB735 GMP → CJU May 23, 10:15 UTCMay 23, 10:40 UTC25m
2026-05-23 TWB728 CJU → GMP May 23, 08:40 UTCMay 23, 09:15 UTC35m
2026-05-22 TWB216 NRT → ICN May 22, 10:55 UTCMay 22, 11:35 UTC40m
2026-05-22 TWB252 NRT → TAE May 22, 05:05 UTCMay 22, 06:50 UTC1h 45m
2026-05-22 TWB251 TAE → NRT May 22, 01:45 UTCMay 22, 03:25 UTC1h 40m
2026-05-21 TWB214 FUK → TAE May 21, 06:20 UTCMay 21, 06:45 UTC25m
2026-05-21 TWB227 CJU → FUK May 21, 03:40 UTCMay 21, 03:55 UTC15m
2026-05-21 TWB807 TAE → CJU May 21, 01:05 UTCMay 21, 01:15 UTC10m
2026-05-20 TWB812 - May 20, 13:00 UTCMay 20, 13:10 UTC10m
2026-05-20 TWB806 CJU → TAE May 20, 09:35 UTCMay 20, 09:50 UTC15m
2026-05-20 TWB725 - May 20, 06:45 UTCMay 20, 07:15 UTC30m
2026-05-20 TWB720 CJU → GMP May 20, 05:00 UTCMay 20, 05:45 UTC45m
2026-05-20 TWB707 GMP → CJU May 20, 01:05 UTCMay 20, 01:35 UTC30m
2026-05-19 TWB702 CJU → GMP May 19, 23:20 UTCMay 20, 00:00 UTC40m
2026-05-19 TWB810 CJU → TAE May 19, 10:45 UTCMay 19, 10:55 UTC10m
2026-05-19 TWB690 KHH → CJU May 19, 05:55 UTCMay 19, 06:35 UTC40m
2026-05-19 TWB689 CJU → KHH May 19, 03:40 UTCMay 19, 04:25 UTC45m
2026-05-18 TWB332 KIX → CJU May 18, 03:25 UTCMay 18, 04:05 UTC40m
2026-05-17 TWB640 HKG → PUS May 17, 18:20 UTCMay 18, 01:30 UTC7h 10m
2026-05-17 TWB639 PUS → HKG May 17, 15:05 UTCMay 17, 16:35 UTC1h 30m
2026-05-17 TWB322 KIX → PUS May 17, 06:55 UTCMay 17, 07:25 UTC30m
2026-05-17 TWB321 PUS → KIX May 17, 04:25 UTCMay 17, 05:05 UTC40m
2026-05-16 TWB676 KHH → PUS May 16, 09:40 UTCMay 16, 10:31 UTC50m
2026-05-16 TWB675 PUS → KHH May 16, 07:20 UTCMay 16, 08:20 UTC1h 0m
2026-05-16 TWB923 GMP → PUS May 16, 02:10 UTCMay 16, 02:40 UTC30m

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?
Yes. Mode-S 71C379 is currently airborne.
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 TWB908, TWB907, TWB639, TWB252, TWB728.