Apparatus

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sensors Mode-S transponder

71C708

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

Currently assigned to HL8708 · AIRBUS A-330-200

Hex
71C708
Octal
34343410
Decimal
7,456,520
Country
KR
Tail
HL8708
Type
A332
No current signal · last broadcast 5d ago
Flights observed
102
Distinct callsigns
12
Country
KR
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S 71C708.

Country allocation

The ICAO 24-bit address 71C708 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 12 distinct

Callsign Airline Flights Last seen
TWB404 - 21 2026-07-14
TWB407 - 18 2026-07-10
TWB403 - 17 2026-07-13
TWB408 - 14 2026-07-11
TWB406 - 10 2026-06-25
TWB405 - 9 2026-06-24
TWB401 Tway Airlines 4 2026-05-15
TWB402 Tway Airlines 3 2026-05-16
TWB410 - 2 2026-06-28
TWB409 - 2 2026-06-27
TWB246 Tway Airlines 1 2026-06-03
TWB245 Tway Airlines 1 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TWB404 - Jul 14, 03:45 UTCJul 14, 04:05 UTC20m
2026-07-13 TWB404 - Jul 13, 17:05 UTCJul 14, 02:55 UTC9h 50m
2026-07-13 TWB403 - Jul 13, 01:10 UTCJul 13, 14:30 UTC13h 20m
2026-07-11 TWB408 - Jul 11, 06:20 UTCJul 11, 06:45 UTC25m
2026-07-10 TWB408 - Jul 10, 19:10 UTCJul 11, 05:35 UTC10h 25m
2026-07-10 TWB407 - Jul 10, 03:50 UTCJul 10, 16:30 UTC12h 40m
2026-07-10 TWB407 - Jul 10, 02:35 UTCJul 10, 02:55 UTC20m
2026-07-06 TWB404 - Jul 6, 17:15 UTCJul 6, 19:35 UTC2h 20m
2026-07-06 TWB403 ICN → FRA Jul 6, 01:55 UTCJul 6, 15:05 UTC13h 10m
2026-07-05 TWB408 - Jul 5, 06:55 UTCJul 5, 07:15 UTC20m
2026-07-04 TWB408 - Jul 4, 19:35 UTCJul 5, 06:05 UTC10h 30m
2026-07-04 TWB407 - Jul 4, 03:50 UTCJul 4, 12:35 UTC8h 45m
2026-07-04 TWB407 - Jul 4, 02:35 UTCJul 4, 02:50 UTC15m
2026-06-30 TWB404 - Jun 30, 04:20 UTCJun 30, 04:40 UTC20m
2026-06-29 TWB404 - Jun 29, 17:24 UTCJun 30, 03:25 UTC10h 1m
2026-06-29 TWB403 - Jun 29, 01:05 UTCJun 29, 11:20 UTC10h 15m
2026-06-28 TWB410 - Jun 28, 08:19 UTCJun 28, 08:39 UTC20m
2026-06-27 TWB410 - Jun 27, 22:20 UTCJun 28, 07:25 UTC9h 5m
2026-06-27 TWB409 - Jun 27, 08:14 UTCJun 27, 19:29 UTC11h 15m
2026-06-27 TWB409 - Jun 27, 07:10 UTCJun 27, 07:24 UTC15m
2026-06-25 TWB406 - Jun 25, 06:44 UTCJun 25, 07:05 UTC20m
2026-06-24 TWB406 - Jun 24, 20:24 UTCJun 25, 05:55 UTC9h 30m
2026-06-24 TWB405 - Jun 24, 04:05 UTCJun 24, 17:14 UTC13h 10m
2026-06-22 TWB406 - Jun 22, 05:54 UTCJun 22, 06:15 UTC20m
2026-06-21 TWB406 - Jun 21, 19:45 UTCJun 22, 05:10 UTC9h 25m
2026-06-21 TWB405 - Jun 21, 05:15 UTCJun 21, 17:24 UTC12h 10m
2026-06-21 TWB405 - Jun 21, 03:55 UTCJun 21, 04:10 UTC15m
2026-06-20 TWB404 - Jun 20, 03:54 UTCJun 20, 04:14 UTC20m
2026-06-19 TWB404 - Jun 19, 17:19 UTCJun 20, 03:09 UTC9h 50m
2026-06-19 TWB403 - Jun 19, 09:49 UTCJun 19, 14:15 UTC4h 25m
2026-06-19 TWB403 - Jun 19, 01:15 UTCJun 19, 01:29 UTC15m
2026-06-18 TWB406 - Jun 18, 06:30 UTCJun 18, 06:55 UTC25m
2026-06-17 TWB406 - Jun 17, 19:45 UTCJun 17, 23:20 UTC3h 35m
2026-06-17 TWB405 - Jun 17, 13:05 UTCJun 17, 17:15 UTC4h 10m
2026-06-17 TWB405 - Jun 17, 04:15 UTCJun 17, 04:30 UTC15m
2026-06-16 TWB404 - Jun 16, 04:00 UTCJun 16, 04:25 UTC25m
2026-06-15 TWB404 - Jun 15, 17:15 UTCJun 15, 19:30 UTC2h 15m
2026-06-15 TWB403 ICN → FRA Jun 15, 06:45 UTCJun 15, 11:19 UTC4h 35m
2026-06-15 TWB403 ICN → FRA Jun 15, 01:15 UTCJun 15, 01:30 UTC15m
2026-06-09 TWB404 FRA → ICN Jun 9, 04:00 UTCJun 9, 04:30 UTC30m
2026-06-08 TWB404 FRA → ICN Jun 8, 17:10 UTCJun 9, 03:10 UTC10h 0m
2026-06-08 TWB403 ICN → FRA Jun 8, 02:35 UTCJun 8, 11:40 UTC9h 5m
2026-06-08 TWB403 ICN → FRA Jun 8, 01:15 UTCJun 8, 01:30 UTC15m
2026-06-03 TWB246 NRT → ICN Jun 3, 12:40 UTCJun 3, 14:50 UTC2h 10m
2026-06-03 TWB245 ICN → NRT Jun 3, 08:55 UTCJun 3, 11:10 UTC2h 15m
2026-06-01 TWB404 FRA → ICN Jun 1, 04:30 UTCJun 1, 04:50 UTC20m
2026-05-31 TWB404 FRA → ICN May 31, 17:50 UTCMay 31, 21:30 UTC3h 40m
2026-05-31 TWB403 ICN → FRA May 31, 10:10 UTCMay 31, 14:45 UTC4h 35m
2026-05-25 TWB404 FRA → ICN May 25, 04:20 UTCMay 25, 04:45 UTC25m
2026-05-24 TWB404 FRA → ICN May 24, 17:20 UTCMay 24, 21:20 UTC4h 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 HL8708 page for operator, model, and routing details .

Mode-S 71C708 frequently asked

What is Mode-S code 71C708?
71C708 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8708.
Where is Mode-S 71C708 registered?
Mode-S code 71C708 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 71C708 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C708, octal 34343410, decimal 7,456,520.
What flights does 71C708 operate?
Mode-S 71C708 has broadcast 12 distinct callsigns, including TWB404, TWB407, TWB403, TWB408, TWB406.