Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 4h ago
Flights observed
75
Distinct callsigns
9
Country
KR
Last broadcast
4h 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 9 distinct

Callsign Airline Flights Last seen
TWB408 - 24 2026-06-22
TWB407 - 24 2026-06-22
TWB402 - 7 2026-06-14
TWB401 - 7 2026-06-13
TWB405 Tway Airlines 5 2026-06-07
TWB406 Tway Airlines 4 2026-06-08
TWB404 Tway Airlines 2 2026-06-11
TWB403 Tway Airlines 1 2026-06-10
TWB102F - 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 TWB408 - Jun 22, 19:34 UTCJun 23, 00:15 UTC4h 40m
2026-06-22 TWB407 - Jun 22, 03:54 UTCJun 22, 17:00 UTC13h 5m
2026-06-22 TWB407 - Jun 22, 02:40 UTCJun 22, 02:54 UTC15m
2026-06-21 TWB408 - Jun 21, 06:44 UTCJun 21, 07:14 UTC30m
2026-06-20 TWB408 - Jun 20, 19:24 UTCJun 21, 06:04 UTC10h 40m
2026-06-20 TWB407 - Jun 20, 04:14 UTCJun 20, 17:10 UTC12h 55m
2026-06-20 TWB407 - Jun 20, 02:54 UTCJun 20, 03:19 UTC25m
2026-06-18 TWB408 - Jun 18, 07:35 UTCJun 18, 07:55 UTC20m
2026-06-17 TWB408 - Jun 17, 19:45 UTCJun 17, 22:55 UTC3h 10m
2026-06-17 TWB407 - Jun 17, 08:45 UTCJun 17, 17:00 UTC8h 15m
2026-06-17 TWB407 - Jun 17, 03:10 UTCJun 17, 03:30 UTC20m
2026-06-15 TWB408 - Jun 15, 19:30 UTCJun 15, 22:25 UTC2h 55m
2026-06-15 TWB407 - Jun 15, 08:20 UTCJun 15, 16:45 UTC8h 25m
2026-06-15 TWB407 - Jun 15, 03:00 UTCJun 15, 03:15 UTC15m
2026-06-14 TWB402 - Jun 14, 06:10 UTCJun 14, 06:35 UTC25m
2026-06-13 TWB402 - Jun 13, 18:45 UTCJun 13, 23:05 UTC4h 20m
2026-06-13 TWB401 - Jun 13, 01:30 UTCJun 13, 15:25 UTC13h 54m
2026-06-11 TWB404 FRA → ICN Jun 11, 04:35 UTCJun 11, 04:55 UTC20m
2026-06-10 TWB404 FRA → ICN Jun 10, 17:30 UTCJun 11, 03:40 UTC10h 10m
2026-06-10 TWB403 ICN → FRA Jun 10, 01:05 UTCJun 10, 14:15 UTC13h 10m
2026-06-08 TWB406 FCO → ICN Jun 8, 05:50 UTCJun 8, 06:15 UTC25m
2026-06-07 TWB406 FCO → ICN Jun 7, 19:35 UTCJun 8, 05:00 UTC9h 25m
2026-06-07 TWB405 ICN → FCO Jun 7, 03:55 UTCJun 7, 17:00 UTC13h 5m
2026-06-06 TWB408 BCN → ICN Jun 6, 06:55 UTCJun 6, 07:20 UTC25m
2026-06-05 TWB408 BCN → ICN Jun 5, 19:30 UTCJun 6, 06:10 UTC10h 40m
2026-06-05 TWB407 ICN → BCN Jun 5, 03:50 UTCJun 5, 16:40 UTC12h 50m
2026-06-05 TWB407 ICN → BCN Jun 5, 02:25 UTCJun 5, 02:40 UTC15m
2026-06-04 TWB408 BCN → ICN Jun 4, 07:00 UTCJun 4, 07:20 UTC20m
2026-06-03 TWB408 BCN → ICN Jun 3, 19:40 UTCJun 4, 06:10 UTC10h 30m
2026-06-03 TWB407 ICN → BCN Jun 3, 03:45 UTCJun 3, 16:25 UTC12h 40m
2026-06-03 TWB407 ICN → BCN Jun 3, 02:25 UTCJun 3, 02:45 UTC20m
2026-06-02 TWB408 BCN → ICN Jun 2, 07:05 UTCJun 2, 07:35 UTC30m
2026-06-01 TWB408 BCN → ICN Jun 1, 19:40 UTCJun 2, 00:15 UTC4h 35m
2026-06-01 TWB407 ICN → BCN Jun 1, 08:40 UTCJun 1, 17:05 UTC8h 25m
2026-06-01 TWB407 ICN → BCN Jun 1, 03:00 UTCJun 1, 03:20 UTC20m
2026-05-30 TWB402 CDG → ICN May 30, 18:50 UTCMay 30, 23:00 UTC4h 10m
2026-05-30 TWB401 ICN → CDG May 30, 07:05 UTCMay 30, 15:30 UTC8h 25m
2026-05-30 TWB401 ICN → CDG May 30, 01:25 UTCMay 30, 01:40 UTC15m
2026-05-28 TWB408 BCN → ICN May 28, 06:55 UTCMay 28, 07:25 UTC30m
2026-05-27 TWB408 BCN → ICN May 27, 19:25 UTCMay 28, 06:15 UTC10h 50m
2026-05-27 TWB407 ICN → BCN May 27, 04:04 UTCMay 27, 16:50 UTC12h 45m
2026-05-27 TWB407 ICN → BCN May 27, 02:44 UTCMay 27, 03:04 UTC20m
2026-05-26 TWB408 BCN → ICN May 26, 07:49 UTCMay 26, 08:15 UTC25m
2026-05-25 TWB408 BCN → ICN May 25, 19:40 UTCMay 26, 06:59 UTC11h 20m
2026-05-25 TWB407 ICN → BCN May 25, 08:25 UTCMay 25, 16:15 UTC7h 50m
2026-05-25 TWB407 ICN → BCN May 25, 02:20 UTCMay 25, 03:00 UTC40m
2026-05-23 TWB408 BCN → ICN May 23, 09:50 UTCMay 23, 09:55 UTC5m
2026-05-23 TWB408 BCN → ICN May 23, 07:15 UTCMay 23, 07:40 UTC25m
2026-05-22 TWB408 BCN → ICN May 22, 19:20 UTCMay 22, 22:25 UTC3h 5m
2026-05-22 TWB407 ICN → BCN May 22, 02:50 UTCMay 22, 16:25 UTC13h 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 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 4h 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 9 distinct callsigns, including TWB408, TWB407, TWB402, TWB401, TWB405.