Apparatus

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sensors Mode-S transponder

71C276

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

Currently assigned to HL8276 · AIRBUS A-330-200

Hex
71C276
Octal
34341166
Decimal
7,455,350
Country
KR
Tail
HL8276
Type
A332
No current signal · last broadcast 11d ago
Flights observed
132
Distinct callsigns
11
Country
KR
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S 71C276.

Country allocation

The ICAO 24-bit address 71C276 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 11 distinct

Callsign Airline Flights Last seen
TWB408 Tway Airlines 34 2026-07-24
TWB407 Tway Airlines 33 2026-07-24
TWB404 - 13 2026-07-18
TWB403 - 12 2026-07-17
TWB402 - 9 2026-07-14
TWB401 - 9 2026-07-13
TWB406 Tway Airlines 7 2026-07-26
TWB405 Tway Airlines 7 2026-07-26
TWB410 Tway Airlines 4 2026-07-19
TWB409 Tway Airlines 3 2026-07-18
TWB102F - 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB406 FCO → ICN Jul 26, 19:45 UTCJul 26, 21:30 UTC1h 45m
2026-07-26 TWB405 ICN → FCO Jul 26, 03:45 UTCJul 26, 16:20 UTC12h 36m
2026-07-24 TWB408 BCN → ICN Jul 24, 19:25 UTCJul 25, 07:00 UTC11h 35m
2026-07-24 TWB407 ICN → BCN Jul 24, 04:30 UTCJul 24, 17:20 UTC12h 50m
2026-07-24 TWB407 ICN → BCN Jul 24, 03:10 UTCJul 24, 03:35 UTC25m
2026-07-21 TWB408 BCN → ICN Jul 21, 07:35 UTCJul 21, 08:05 UTC30m
2026-07-20 TWB408 BCN → ICN Jul 20, 20:35 UTCJul 21, 06:50 UTC10h 14m
2026-07-20 TWB407 ICN → BCN Jul 20, 03:40 UTCJul 20, 17:35 UTC13h 55m
2026-07-20 TWB407 ICN → BCN Jul 20, 02:25 UTCJul 20, 02:55 UTC30m
2026-07-19 TWB410 ZAG → ICN Jul 19, 08:00 UTCJul 19, 08:25 UTC25m
2026-07-18 TWB410 ZAG → ICN Jul 18, 22:15 UTCJul 19, 07:15 UTC9h 0m
2026-07-18 TWB409 ICN → ZAG Jul 18, 07:15 UTCJul 18, 19:55 UTC12h 40m
2026-07-18 TWB404 - Jul 18, 04:40 UTCJul 18, 05:00 UTC20m
2026-07-17 TWB404 - Jul 17, 18:10 UTCJul 18, 03:55 UTC9h 46m
2026-07-17 TWB403 - Jul 17, 02:45 UTCJul 17, 15:10 UTC12h 25m
2026-07-17 TWB403 - Jul 17, 01:29 UTCJul 17, 01:49 UTC20m
2026-07-15 TWB404 - Jul 15, 17:10 UTCJul 15, 20:45 UTC3h 35m
2026-07-15 TWB403 - Jul 15, 02:30 UTCJul 15, 14:45 UTC12h 15m
2026-07-15 TWB403 - Jul 15, 01:10 UTCJul 15, 01:30 UTC20m
2026-07-14 TWB402 - Jul 14, 06:15 UTCJul 14, 06:40 UTC25m
2026-07-13 TWB402 - Jul 13, 19:15 UTCJul 14, 05:20 UTC10h 5m
2026-07-13 TWB401 - Jul 13, 02:50 UTCJul 13, 15:25 UTC12h 35m
2026-07-13 TWB401 - Jul 13, 01:35 UTCJul 13, 02:01 UTC25m
2026-07-12 TWB410 - Jul 12, 08:05 UTCJul 12, 08:25 UTC20m
2026-07-11 TWB410 - Jul 11, 22:15 UTCJul 12, 07:15 UTC9h 0m
2026-07-11 TWB409 - Jul 11, 08:25 UTCJul 11, 19:45 UTC11h 20m
2026-07-11 TWB409 - Jul 11, 07:20 UTCJul 11, 07:35 UTC15m
2026-07-11 TWB404 - Jul 11, 04:15 UTCJul 11, 04:40 UTC25m
2026-07-10 TWB404 - Jul 10, 17:50 UTCJul 11, 03:35 UTC9h 45m
2026-07-10 TWB403 - Jul 10, 02:25 UTCJul 10, 14:35 UTC12h 10m
2026-07-10 TWB403 - Jul 10, 01:10 UTCJul 10, 01:30 UTC20m
2026-07-09 TWB404 - Jul 9, 04:05 UTCJul 9, 04:25 UTC20m
2026-07-08 TWB404 - Jul 8, 17:35 UTCJul 9, 03:20 UTC9h 45m
2026-07-08 TWB403 - Jul 8, 02:40 UTCJul 8, 14:45 UTC12h 5m
2026-07-08 TWB403 - Jul 8, 01:20 UTCJul 8, 01:40 UTC20m
2026-07-06 TWB404 - Jul 6, 04:05 UTCJul 6, 04:25 UTC20m
2026-07-05 TWB404 - Jul 5, 17:20 UTCJul 6, 03:20 UTC10h 0m
2026-07-05 TWB403 ICN → FRA Jul 5, 01:30 UTCJul 5, 14:20 UTC12h 50m
2026-07-04 TWB408 - Jul 4, 07:20 UTCJul 4, 07:50 UTC30m
2026-07-03 TWB408 - Jul 3, 19:40 UTCJul 4, 06:25 UTC10h 45m
2026-07-03 TWB407 - Jul 3, 03:45 UTCJul 3, 16:05 UTC12h 20m
2026-07-03 TWB407 - Jul 3, 02:30 UTCJul 3, 02:55 UTC25m
2026-07-02 TWB408 - Jul 2, 07:00 UTCJul 2, 07:20 UTC20m
2026-07-01 TWB408 - Jul 1, 19:35 UTCJul 1, 23:55 UTC4h 20m
2026-07-01 TWB407 ICN → BCN Jul 1, 02:40 UTCJul 1, 16:15 UTC13h 35m
2026-06-29 TWB406 - Jun 29, 06:09 UTCJun 29, 06:40 UTC30m
2026-06-28 TWB406 - Jun 28, 19:44 UTCJun 29, 05:24 UTC9h 40m
2026-06-28 TWB405 ICN → FCO Jun 28, 03:50 UTCJun 28, 17:00 UTC13h 10m
2026-06-27 TWB404 - Jun 27, 04:29 UTCJun 27, 04:59 UTC30m
2026-06-26 TWB404 - Jun 26, 17:40 UTCJun 27, 03:44 UTC10h 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 HL8276 page for operator, model, and routing details .

Mode-S 71C276 frequently asked

What is Mode-S code 71C276?
71C276 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8276.
Where is Mode-S 71C276 registered?
Mode-S code 71C276 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 71C276 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C276, octal 34341166, decimal 7,455,350.
What flights does 71C276 operate?
Mode-S 71C276 has broadcast 11 distinct callsigns, including TWB408, TWB407, TWB404, TWB403, TWB402.