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
- Flights observed
- 142
- Distinct callsigns
- 11
- Country
- KR
- Last broadcast
- 3h ago
Last known position
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
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | TWB408 | - | Jul 14, 06:35 UTC | Jul 14, 06:55 UTC | 20m |
| 2026-07-13 | TWB408 | - | Jul 13, 19:30 UTC | Jul 14, 05:40 UTC | 10h 10m |
| 2026-07-13 | TWB407 | - | Jul 13, 03:50 UTC | Jul 13, 16:50 UTC | 13h 0m |
| 2026-07-13 | TWB407 | - | Jul 13, 02:35 UTC | Jul 13, 02:55 UTC | 20m |
| 2026-07-12 | TWB402 | - | Jul 12, 05:50 UTC | Jul 12, 06:10 UTC | 20m |
| 2026-07-11 | TWB402 | - | Jul 11, 18:40 UTC | Jul 12, 05:05 UTC | 10h 25m |
| 2026-07-11 | TWB401 | - | Jul 11, 02:55 UTC | Jul 11, 15:25 UTC | 12h 30m |
| 2026-07-11 | TWB401 | - | Jul 11, 01:35 UTC | Jul 11, 01:55 UTC | 20m |
| 2026-07-09 | TWB3408 | - | Jul 9, 06:15 UTC | Jul 9, 06:40 UTC | 25m |
| 2026-07-08 | TWB3408 | - | Jul 8, 19:05 UTC | Jul 9, 05:25 UTC | 10h 20m |
| 2026-07-06 | TWB407 | - | Jul 6, 04:30 UTC | Jul 6, 16:55 UTC | 12h 25m |
| 2026-07-06 | TWB407 | - | Jul 6, 03:15 UTC | Jul 6, 03:35 UTC | 20m |
| 2026-07-05 | TWB410 | - | Jul 5, 07:55 UTC | Jul 5, 08:20 UTC | 25m |
| 2026-07-04 | TWB410 | - | Jul 4, 22:05 UTC | Jul 5, 07:10 UTC | 9h 5m |
| 2026-07-04 | TWB409 | - | Jul 4, 08:20 UTC | Jul 4, 19:15 UTC | 10h 55m |
| 2026-07-04 | TWB409 | - | Jul 4, 07:10 UTC | Jul 4, 07:30 UTC | 20m |
| 2026-07-04 | TWB404 | - | Jul 4, 04:05 UTC | Jul 4, 04:35 UTC | 30m |
| 2026-07-03 | TWB404 | - | Jul 3, 17:20 UTC | Jul 4, 03:20 UTC | 10h 0m |
| 2026-07-03 | TWB403 | - | Jul 3, 02:30 UTC | Jul 3, 14:30 UTC | 12h 0m |
| 2026-07-03 | TWB403 | - | Jul 3, 01:10 UTC | Jul 3, 01:35 UTC | 25m |
| 2026-07-02 | TWB406 | - | Jul 2, 06:20 UTC | Jul 2, 06:41 UTC | 21m |
| 2026-07-01 | TWB406 | - | Jul 1, 19:45 UTC | Jul 1, 23:10 UTC | 3h 25m |
| 2026-07-01 | TWB405 | ICN → FCO | Jul 1, 04:10 UTC | Jul 1, 16:50 UTC | 12h 40m |
| 2026-06-30 | TWB408 | - | Jun 30, 07:10 UTC | Jun 30, 07:30 UTC | 20m |
| 2026-06-29 | TWB408 | - | Jun 29, 19:35 UTC | Jun 30, 06:15 UTC | 10h 41m |
| 2026-06-29 | TWB407 | ICN → BCN | Jun 29, 02:20 UTC | Jun 29, 16:04 UTC | 13h 45m |
| 2026-06-28 | TWB402 | - | Jun 28, 06:15 UTC | Jun 28, 06:40 UTC | 25m |
| 2026-06-27 | TWB402 | - | Jun 27, 19:00 UTC | Jun 28, 05:29 UTC | 10h 30m |
| 2026-06-27 | TWB401 | - | Jun 27, 02:35 UTC | Jun 27, 06:50 UTC | 4h 15m |
| 2026-06-27 | TWB401 | - | Jun 27, 01:24 UTC | Jun 27, 01:44 UTC | 20m |
| 2026-06-25 | TWB404 | - | Jun 25, 05:09 UTC | Jun 25, 05:35 UTC | 25m |
| 2026-06-24 | TWB404 | - | Jun 24, 18:25 UTC | Jun 25, 04:25 UTC | 10h 0m |
| 2026-06-24 | TWB403 | - | Jun 24, 02:54 UTC | Jun 24, 15:05 UTC | 12h 10m |
| 2026-06-24 | TWB403 | - | Jun 24, 01:34 UTC | Jun 24, 01:55 UTC | 20m |
| 2026-06-22 | TWB404 | - | Jun 22, 03:50 UTC | Jun 22, 04:15 UTC | 25m |
| 2026-06-21 | TWB404 | - | Jun 21, 17:10 UTC | Jun 22, 02:59 UTC | 9h 50m |
| 2026-06-21 | TWB403 | - | Jun 21, 02:45 UTC | Jun 21, 15:15 UTC | 12h 30m |
| 2026-06-21 | TWB403 | - | Jun 21, 01:25 UTC | Jun 21, 01:39 UTC | 15m |
| 2026-06-20 | TWB408 | - | Jun 20, 07:14 UTC | Jun 20, 07:44 UTC | 30m |
| 2026-06-19 | TWB408 | - | Jun 19, 19:54 UTC | Jun 20, 06:29 UTC | 10h 35m |
| 2026-06-19 | TWB407 | - | Jun 19, 07:54 UTC | Jun 19, 16:14 UTC | 8h 20m |
| 2026-06-19 | TWB407 | - | Jun 19, 02:24 UTC | Jun 19, 02:39 UTC | 15m |
| 2026-06-18 | TWB404 | - | Jun 18, 04:15 UTC | Jun 18, 04:45 UTC | 30m |
| 2026-06-17 | TWB404 | - | Jun 17, 17:15 UTC | Jun 17, 19:35 UTC | 2h 20m |
| 2026-06-17 | TWB403 | - | Jun 17, 09:55 UTC | Jun 17, 11:20 UTC | 1h 25m |
| 2026-06-17 | TWB403 | - | Jun 17, 01:20 UTC | Jun 17, 01:40 UTC | 20m |
| 2026-06-16 | TWB406 | - | Jun 16, 06:20 UTC | Jun 16, 06:50 UTC | 30m |
| 2026-06-15 | TWB406 | - | Jun 15, 19:50 UTC | Jun 15, 23:09 UTC | 3h 20m |
| 2026-06-15 | TWB405 | - | Jun 15, 09:40 UTC | Jun 15, 17:10 UTC | 7h 30m |
| 2026-06-15 | TWB405 | - | Jun 15, 04:10 UTC | Jun 15, 04:25 UTC | 15m |
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 .