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 3h ago
Flights observed
142
Distinct callsigns
11
Country
KR
Last broadcast
3h ago

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 11 distinct

Callsign Airline Flights Last seen
TWB407 - 23 2026-07-13
TWB404 - 22 2026-07-04
TWB408 - 20 2026-07-14
TWB405 - 20 2026-07-01
TWB403 - 20 2026-07-03
TWB406 - 18 2026-07-02
TWB402 - 7 2026-07-12
TWB401 - 6 2026-07-11
TWB410 - 2 2026-07-05
TWB409 - 2 2026-07-04
TWB3408 - 2 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-29 TWB407 ICN → BCN Jun 29, 02:20 UTCJun 29, 16:04 UTC13h 45m
2026-06-28 TWB402 - Jun 28, 06:15 UTCJun 28, 06:40 UTC25m
2026-06-27 TWB402 - Jun 27, 19:00 UTCJun 28, 05:29 UTC10h 30m
2026-06-27 TWB401 - Jun 27, 02:35 UTCJun 27, 06:50 UTC4h 15m
2026-06-27 TWB401 - Jun 27, 01:24 UTCJun 27, 01:44 UTC20m
2026-06-25 TWB404 - Jun 25, 05:09 UTCJun 25, 05:35 UTC25m
2026-06-24 TWB404 - Jun 24, 18:25 UTCJun 25, 04:25 UTC10h 0m
2026-06-24 TWB403 - Jun 24, 02:54 UTCJun 24, 15:05 UTC12h 10m
2026-06-24 TWB403 - Jun 24, 01:34 UTCJun 24, 01:55 UTC20m
2026-06-22 TWB404 - Jun 22, 03:50 UTCJun 22, 04:15 UTC25m
2026-06-21 TWB404 - Jun 21, 17:10 UTCJun 22, 02:59 UTC9h 50m
2026-06-21 TWB403 - Jun 21, 02:45 UTCJun 21, 15:15 UTC12h 30m
2026-06-21 TWB403 - Jun 21, 01:25 UTCJun 21, 01:39 UTC15m
2026-06-20 TWB408 - Jun 20, 07:14 UTCJun 20, 07:44 UTC30m
2026-06-19 TWB408 - Jun 19, 19:54 UTCJun 20, 06:29 UTC10h 35m
2026-06-19 TWB407 - Jun 19, 07:54 UTCJun 19, 16:14 UTC8h 20m
2026-06-19 TWB407 - Jun 19, 02:24 UTCJun 19, 02:39 UTC15m
2026-06-18 TWB404 - Jun 18, 04:15 UTCJun 18, 04:45 UTC30m
2026-06-17 TWB404 - Jun 17, 17:15 UTCJun 17, 19:35 UTC2h 20m
2026-06-17 TWB403 - Jun 17, 09:55 UTCJun 17, 11:20 UTC1h 25m
2026-06-17 TWB403 - Jun 17, 01:20 UTCJun 17, 01:40 UTC20m
2026-06-16 TWB406 - Jun 16, 06:20 UTCJun 16, 06:50 UTC30m
2026-06-15 TWB406 - Jun 15, 19:50 UTCJun 15, 23:09 UTC3h 20m
2026-06-15 TWB405 - Jun 15, 09:40 UTCJun 15, 17:10 UTC7h 30m
2026-06-15 TWB405 - Jun 15, 04:10 UTCJun 15, 04:25 UTC15m

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 3h ago.
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 11 distinct callsigns, including TWB407, TWB404, TWB408, TWB405, TWB403.