Apparatus

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sensors Mode-S transponder

71C324

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

Currently assigned to HL8324 · BOEING 737-800

Hex
71C324
Octal
34341444
Decimal
7,455,524
Country
KR
Tail
HL8324
Type
B738
No current signal · last broadcast 5h ago
Flights observed
214
Distinct callsigns
20
Country
KR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 71C324.

Country allocation

The ICAO 24-bit address 71C324 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
TWB643 - 15 2026-07-11
TWB644 - 8 2026-07-11
TWB252 - 8 2026-07-01
TWB251 - 8 2026-07-01
TWB314 - 7 2026-06-30
TWB305 - 7 2026-06-30
TWB669 - 6 2026-07-13
TWB313 - 6 2026-07-07
TWB312 - 6 2026-07-07
TWB311 Tway Airlines 6 2026-07-06
TWB306 - 6 2026-07-07
TWB038 Tway Airlines 6 2026-05-21
TWB683 - 5 2026-07-05
TWB670 - 5 2026-07-13
TWB037 Tway Airlines 5 2026-05-14
TWB034 - 5 2026-07-11
TWB651 Tway Airlines 4 2026-04-20
TWB243 - 4 2026-06-22
TWB725 - 3 2026-04-25
TWB681 Tway Airlines 3 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TWB9617 - Jul 14, 05:00 UTCJul 14, 10:20 UTC5h 20m
2026-07-13 TWB670 RMQ → ICN Jul 13, 09:05 UTCJul 13, 11:25 UTC2h 20m
2026-07-13 TWB669 - Jul 13, 05:15 UTCJul 13, 07:50 UTC2h 35m
2026-07-13 TWB286 - Jul 13, 01:45 UTCJul 13, 02:45 UTC1h 0m
2026-07-12 TWB285 - Jul 12, 23:25 UTCJul 13, 00:30 UTC1h 5m
2026-07-12 TWB304 - Jul 12, 05:50 UTCJul 12, 07:10 UTC1h 20m
2026-07-12 TWB303 ICN → KIX Jul 12, 02:05 UTCJul 12, 03:25 UTC1h 20m
2026-07-11 TWB034 - Jul 11, 12:20 UTCJul 12, 00:01 UTC11h 40m
2026-07-11 TWB644 HKG → ICN Jul 11, 05:35 UTCJul 11, 08:45 UTC3h 10m
2026-07-11 TWB643 - Jul 11, 02:45 UTCJul 11, 03:20 UTC35m
2026-07-11 TWB643 - Jul 11, 00:10 UTCJul 11, 00:50 UTC40m
2026-07-09 TWB034 ICN → ICN Jul 9, 10:55 UTCJul 9, 21:20 UTC10h 25m
2026-07-09 TWB644 HKG → ICN Jul 9, 05:35 UTCJul 9, 08:50 UTC3h 15m
2026-07-09 TWB643 ICN → HKG Jul 9, 00:20 UTCJul 9, 03:25 UTC3h 5m
2026-07-08 TWB033 ICN → ICN Jul 8, 10:20 UTCJul 8, 21:10 UTC10h 50m
2026-07-08 TWB644 HKG → ICN Jul 8, 05:30 UTCJul 8, 08:45 UTC3h 15m
2026-07-08 TWB643 ICN → HKG Jul 8, 00:00 UTCJul 8, 03:25 UTC3h 25m
2026-07-07 TWB306 KIX → ICN Jul 7, 10:45 UTCJul 7, 12:10 UTC1h 25m
2026-07-07 TWB313 - Jul 7, 08:10 UTCJul 7, 09:00 UTC50m
2026-07-07 TWB312 - Jul 7, 02:05 UTCJul 7, 03:15 UTC1h 10m
2026-07-06 TWB311 TAE → KIX Jul 6, 23:05 UTCJul 7, 00:05 UTC1h 0m
2026-07-06 TWB312 - Jul 6, 01:55 UTCJul 6, 02:30 UTC35m
2026-07-05 TWB311 TAE → KIX Jul 5, 23:30 UTCJul 6, 00:10 UTC40m
2026-07-05 TWB683 - Jul 5, 02:20 UTCJul 5, 07:50 UTC5h 30m
2026-07-04 TWB683 - Jul 4, 02:20 UTCJul 4, 08:00 UTC5h 40m
2026-07-03 TWB214 - Jul 3, 05:55 UTCJul 3, 06:25 UTC30m
2026-07-02 TWB213 TAE → FUK Jul 2, 23:25 UTCJul 2, 23:45 UTC20m
2026-07-02 TWB683 - Jul 2, 02:25 UTCJul 2, 08:15 UTC5h 50m
2026-07-01 TWB252 - Jul 1, 05:10 UTCJul 1, 06:50 UTC1h 40m
2026-07-01 TWB251 - Jul 1, 01:55 UTCJul 1, 03:20 UTC1h 25m
2026-06-30 TWB314 - Jun 30, 10:40 UTCJun 30, 11:45 UTC1h 5m
2026-06-30 TWB305 - Jun 30, 07:05 UTCJun 30, 08:35 UTC1h 30m
2026-06-29 TWB306 KIX → ICN Jun 29, 10:50 UTCJun 29, 12:09 UTC1h 20m
2026-06-29 TWB313 - Jun 29, 08:14 UTCJun 29, 09:05 UTC50m
2026-06-29 TWB312 - Jun 29, 02:05 UTCJun 29, 03:14 UTC1h 10m
2026-06-28 TWB311 TAE → KIX Jun 28, 23:25 UTCJun 29, 00:00 UTC35m
2026-06-28 TWB664 - Jun 28, 19:40 UTCJun 28, 20:09 UTC30m
2026-06-28 TWB664 - Jun 28, 18:19 UTCJun 28, 18:34 UTC15m
2026-06-28 TWB663 - Jun 28, 13:59 UTCJun 28, 16:00 UTC2h 0m
2026-06-28 TWB314 - Jun 28, 10:44 UTCJun 28, 11:50 UTC1h 5m
2026-06-28 TWB305 ICN → KIX Jun 28, 07:05 UTCJun 28, 08:25 UTC1h 20m
2026-06-27 TWB672 KHH → ICN Jun 27, 08:35 UTCJun 27, 11:04 UTC2h 30m
2026-06-27 TWB671 ICN → KHH Jun 27, 04:34 UTCJun 27, 07:10 UTC2h 35m
2026-06-27 TWB288 - Jun 27, 01:35 UTCJun 27, 02:29 UTC55m
2026-06-26 TWB287 - Jun 26, 23:04 UTCJun 27, 00:05 UTC1h 0m
2026-06-24 TWB672 KHH → ICN Jun 24, 08:30 UTCJun 24, 10:55 UTC2h 25m
2026-06-24 TWB671 ICN → KHH Jun 24, 04:34 UTCJun 24, 07:05 UTC2h 30m
2026-06-23 TWB013 ICN → ICN Jun 23, 13:19 UTCJun 23, 22:49 UTC9h 30m
2026-06-23 TWB670 - Jun 23, 09:20 UTCJun 23, 11:35 UTC2h 15m
2026-06-23 TWB669 - Jun 23, 05:29 UTCJun 23, 07:35 UTC2h 5m

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 HL8324 page for operator, model, and routing details .

Mode-S 71C324 frequently asked

What is Mode-S code 71C324?
71C324 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8324.
Where is Mode-S 71C324 registered?
Mode-S code 71C324 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 71C324 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C324, octal 34341444, decimal 7,455,524.
What flights does 71C324 operate?
Mode-S 71C324 has broadcast 20 distinct callsigns, including TWB643, TWB644, TWB252, TWB251, TWB314.