Apparatus

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sensors Mode-S transponder

71C227

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

Currently assigned to HL8227 · AIRBUS A-330-200

Hex
71C227
Octal
34341047
Decimal
7,455,271
Country
KR
Tail
HL8227
Type
A332
No current signal · last broadcast Jul 26, 06:30 UTC
Flights observed
167
Distinct callsigns
13
Country
KR
Last broadcast
Jul 26, 06:30 UTC

Last known position

Most recent position reported by Mode-S 71C227.

Country allocation

The ICAO 24-bit address 71C227 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 13 distinct

Callsign Airline Flights Last seen
TWB407 - 25 2026-07-17
TWB405 Tway Airlines 24 2026-07-21
TWB404 Tway Airlines 24 2026-07-20
TWB408 Tway Airlines 22 2026-07-18
TWB403 - 22 2026-07-19
TWB406 Tway Airlines 21 2026-07-21
TWB402 Tway Airlines 9 2026-07-26
TWB401 Tway Airlines 8 2026-07-25
TWB410 Tway Airlines 4 2026-07-24
TWB409 Tway Airlines 4 2026-07-23
TWB3408 - 2 2026-07-09
TWB206 Tway Airlines 1 2026-07-24
TWB205 Tway Airlines 1 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB402 CDG → ICN Jul 26, 06:10 UTCJul 26, 06:30 UTC20m
2026-07-25 TWB402 CDG → ICN Jul 25, 18:45 UTCJul 25, 22:55 UTC4h 10m
2026-07-25 TWB401 ICN → CDG Jul 25, 03:05 UTCJul 25, 15:10 UTC12h 5m
2026-07-25 TWB401 ICN → CDG Jul 25, 01:50 UTCJul 25, 02:15 UTC25m
2026-07-24 TWB206 FUK → ICN Jul 24, 08:50 UTCJul 24, 09:50 UTC1h 0m
2026-07-24 TWB205 ICN → FUK Jul 24, 06:35 UTCJul 24, 07:25 UTC50m
2026-07-24 TWB410 ZAG → ICN Jul 24, 03:10 UTCJul 24, 03:30 UTC20m
2026-07-23 TWB410 ZAG → ICN Jul 23, 17:10 UTCJul 24, 02:20 UTC9h 10m
2026-07-23 TWB409 ICN → ZAG Jul 23, 03:55 UTCJul 23, 12:45 UTC8h 50m
2026-07-23 TWB409 ICN → ZAG Jul 23, 02:40 UTCJul 23, 03:05 UTC25m
2026-07-21 TWB406 FCO → ICN Jul 21, 19:40 UTCJul 21, 21:40 UTC2h 0m
2026-07-21 TWB405 ICN → FCO Jul 21, 05:50 UTCJul 21, 17:40 UTC11h 50m
2026-07-21 TWB405 ICN → FCO Jul 21, 04:30 UTCJul 21, 05:00 UTC30m
2026-07-20 TWB404 FRA → ICN Jul 20, 03:45 UTCJul 20, 04:20 UTC35m
2026-07-19 TWB404 FRA → ICN Jul 19, 17:15 UTCJul 20, 03:00 UTC9h 45m
2026-07-19 TWB403 - Jul 19, 02:35 UTCJul 19, 14:55 UTC12h 20m
2026-07-19 TWB403 - Jul 19, 01:15 UTCJul 19, 01:40 UTC25m
2026-07-18 TWB408 BCN → ICN Jul 18, 06:40 UTCJul 18, 07:10 UTC30m
2026-07-17 TWB408 BCN → ICN Jul 17, 19:35 UTCJul 18, 05:55 UTC10h 21m
2026-07-17 TWB407 ICN → BCN Jul 17, 04:10 UTCJul 17, 17:20 UTC13h 10m
2026-07-17 TWB407 - Jul 17, 02:50 UTCJul 17, 03:20 UTC30m
2026-07-16 TWB406 - Jul 16, 05:50 UTCJul 16, 06:10 UTC20m
2026-07-15 TWB406 - Jul 15, 19:35 UTCJul 16, 05:05 UTC9h 30m
2026-07-15 TWB405 - Jul 15, 05:35 UTCJul 15, 17:35 UTC12h 0m
2026-07-15 TWB405 - Jul 15, 04:15 UTCJul 15, 04:30 UTC15m
2026-07-14 TWB408 - Jul 14, 06:35 UTCJul 14, 06:55 UTC20m
2026-07-13 TWB408 - Jul 13, 19:30 UTCJul 14, 05:40 UTC10h 10m
2026-07-13 TWB407 - Jul 13, 03:50 UTCJul 13, 16:50 UTC13h 0m
2026-07-13 TWB407 - Jul 13, 02:35 UTCJul 13, 02:55 UTC20m
2026-07-12 TWB402 - Jul 12, 05:50 UTCJul 12, 06:10 UTC20m
2026-07-11 TWB402 - Jul 11, 18:40 UTCJul 12, 05:05 UTC10h 25m
2026-07-11 TWB401 - Jul 11, 02:55 UTCJul 11, 15:25 UTC12h 30m
2026-07-11 TWB401 - Jul 11, 01:35 UTCJul 11, 01:55 UTC20m
2026-07-09 TWB3408 - Jul 9, 06:15 UTCJul 9, 06:40 UTC25m
2026-07-08 TWB3408 - Jul 8, 19:05 UTCJul 9, 05:25 UTC10h 20m
2026-07-06 TWB407 - Jul 6, 04:30 UTCJul 6, 16:55 UTC12h 25m
2026-07-06 TWB407 - Jul 6, 03:15 UTCJul 6, 03:35 UTC20m
2026-07-05 TWB410 - Jul 5, 07:55 UTCJul 5, 08:20 UTC25m
2026-07-04 TWB410 - Jul 4, 22:05 UTCJul 5, 07:10 UTC9h 5m
2026-07-04 TWB409 - Jul 4, 08:20 UTCJul 4, 19:15 UTC10h 55m
2026-07-04 TWB409 - Jul 4, 07:10 UTCJul 4, 07:30 UTC20m
2026-07-04 TWB404 - Jul 4, 04:05 UTCJul 4, 04:35 UTC30m
2026-07-03 TWB404 - Jul 3, 17:20 UTCJul 4, 03:20 UTC10h 0m
2026-07-03 TWB403 - Jul 3, 02:30 UTCJul 3, 14:30 UTC12h 0m
2026-07-03 TWB403 - Jul 3, 01:10 UTCJul 3, 01:35 UTC25m
2026-07-02 TWB406 - Jul 2, 06:20 UTCJul 2, 06:41 UTC21m
2026-07-01 TWB406 - Jul 1, 19:45 UTCJul 1, 23:10 UTC3h 25m
2026-07-01 TWB405 ICN → FCO Jul 1, 04:10 UTCJul 1, 16:50 UTC12h 40m
2026-06-30 TWB408 - Jun 30, 07:10 UTCJun 30, 07:30 UTC20m
2026-06-29 TWB408 - Jun 29, 19:35 UTCJun 30, 06:15 UTC10h 41m

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 HL8227 page for operator, model, and routing details .

Mode-S 71C227 frequently asked

What is Mode-S code 71C227?
71C227 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8227.
Where is Mode-S 71C227 registered?
Mode-S code 71C227 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 71C227 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 06:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C227, octal 34341047, decimal 7,455,271.
What flights does 71C227 operate?
Mode-S 71C227 has broadcast 13 distinct callsigns, including TWB407, TWB405, TWB404, TWB408, TWB403.