sensors Mode-S transponder
71C574
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8754 · BOEING 787-10 Dreamliner
- Hex
- 71C574
- Octal
- 34342564
- Decimal
- 7,456,116
- Country
- KR
- Tail
- HL8754
- Type
- B78X
- Flights observed
- 207
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 8h ago
Last known position
Country allocation
The ICAO 24-bit address 71C574 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| KAL072 | - | 13 | 2026-07-02 |
| KAL042 | - | 11 | 2026-07-01 |
| KAL041 | - | 11 | 2026-07-01 |
| KAL075 | - | 10 | 2026-07-13 |
| KAL076 | - | 9 | 2026-07-08 |
| KAL071 | - | 9 | 2026-07-02 |
| KAL054 | - | 9 | 2026-07-04 |
| KAL023 | - | 9 | 2026-07-05 |
| KAL882 | - | 8 | 2026-07-09 |
| KAL053 | - | 8 | 2026-07-03 |
| KAL024 | - | 7 | 2026-07-05 |
| KAL970 | - | 6 | 2026-06-28 |
| KAL969 | - | 5 | 2026-06-27 |
| KAL928 | - | 5 | 2026-06-23 |
| KAL927 | - | 5 | 2026-06-22 |
| KAL724 | - | 5 | 2026-06-20 |
| KAL723 | - | 5 | 2026-06-20 |
| KAL402 | - | 5 | 2026-07-06 |
| KAL401 | - | 5 | 2026-07-06 |
| KAL2021 | - | 5 | 2026-07-09 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | KAL075 | ICN → YVR | Jul 13, 14:05 UTC | Jul 13, 23:40 UTC | 9h 35m |
| 2026-07-13 | KAL412 | - | Jul 13, 09:50 UTC | Jul 13, 10:50 UTC | 1h 0m |
| 2026-07-12 | KAL412 | - | Jul 12, 23:15 UTC | Jul 12, 23:25 UTC | 10m |
| 2026-07-12 | KAL411 | - | Jul 12, 19:50 UTC | Jul 12, 20:10 UTC | 20m |
| 2026-07-12 | KAL411 | - | Jul 12, 09:25 UTC | Jul 12, 10:20 UTC | 55m |
| 2026-07-12 | KAL918 | - | Jul 12, 04:30 UTC | Jul 12, 04:50 UTC | 20m |
| 2026-07-11 | KAL918 | - | Jul 11, 18:05 UTC | Jul 12, 03:40 UTC | 9h 35m |
| 2026-07-11 | KAL917 | - | Jul 11, 04:05 UTC | Jul 11, 15:30 UTC | 11h 25m |
| 2026-07-11 | KAL917 | - | Jul 11, 02:50 UTC | Jul 11, 03:10 UTC | 20m |
| 2026-07-10 | KAL434 | - | Jul 10, 09:25 UTC | Jul 11, 00:45 UTC | 15h 20m |
| 2026-07-09 | KAL882 | - | Jul 9, 23:40 UTC | Jul 10, 05:20 UTC | 5h 40m |
| 2026-07-09 | KAL2022 | - | Jul 9, 05:45 UTC | Jul 9, 07:50 UTC | 2h 5m |
| 2026-07-09 | KAL2021 | ICN → TPE | Jul 9, 01:55 UTC | Jul 9, 03:55 UTC | 2h 0m |
| 2026-07-08 | KAL076 | YVR → ICN | Jul 8, 08:15 UTC | Jul 8, 19:05 UTC | 10h 50m |
| 2026-07-07 | KAL075 | - | Jul 7, 13:55 UTC | Jul 7, 23:05 UTC | 9h 10m |
| 2026-07-06 | KAL402 | SYD → ICN | Jul 6, 22:45 UTC | Jul 7, 08:50 UTC | 10h 5m |
| 2026-07-06 | KAL401 | ICN → SYD | Jul 6, 10:55 UTC | Jul 6, 20:30 UTC | 9h 35m |
| 2026-07-05 | KAL024 | - | Jul 5, 20:40 UTC | Jul 6, 08:35 UTC | 11h 55m |
| 2026-07-05 | KAL023 | ICN → SFO | Jul 5, 07:30 UTC | Jul 5, 17:30 UTC | 10h 0m |
| 2026-07-05 | KAL882 | - | Jul 5, 04:30 UTC | Jul 5, 05:10 UTC | 40m |
| 2026-07-04 | KAL881 | - | Jul 4, 23:55 UTC | Jul 5, 00:30 UTC | 35m |
| 2026-07-04 | KAL054 | - | Jul 4, 06:20 UTC | Jul 4, 08:45 UTC | 2h 25m |
| 2026-07-03 | KAL054 | - | Jul 3, 23:20 UTC | Jul 3, 23:30 UTC | 10m |
| 2026-07-03 | KAL053 | - | Jul 3, 20:20 UTC | Jul 3, 20:30 UTC | 10m |
| 2026-07-03 | KAL053 | - | Jul 3, 12:25 UTC | Jul 3, 14:10 UTC | 1h 45m |
| 2026-07-02 | KAL072 | - | Jul 2, 22:10 UTC | Jul 3, 08:50 UTC | 10h 40m |
| 2026-07-02 | KAL071 | ICN → YVR | Jul 2, 11:00 UTC | Jul 2, 19:45 UTC | 8h 45m |
| 2026-07-01 | KAL042 | SEA → ICN | Jul 1, 21:15 UTC | Jul 2, 08:40 UTC | 11h 25m |
| 2026-07-01 | KAL041 | ICN → SEA | Jul 1, 08:10 UTC | Jul 1, 17:20 UTC | 9h 10m |
| 2026-06-30 | KAL918 | ZRH → ICN | Jun 30, 17:50 UTC | Jul 1, 04:55 UTC | 11h 5m |
| 2026-06-30 | KAL917 | - | Jun 30, 03:50 UTC | Jun 30, 15:15 UTC | 11h 25m |
| 2026-06-30 | KAL917 | - | Jun 30, 02:40 UTC | Jun 30, 02:55 UTC | 15m |
| 2026-06-28 | KAL412 | - | Jun 28, 23:14 UTC | Jun 29, 10:29 UTC | 11h 15m |
| 2026-06-28 | KAL411 | ICN → AKL | Jun 28, 09:30 UTC | Jun 28, 20:29 UTC | 11h 0m |
| 2026-06-28 | KAL970 | - | Jun 28, 03:35 UTC | Jun 28, 03:55 UTC | 20m |
| 2026-06-27 | KAL970 | - | Jun 27, 17:29 UTC | Jun 28, 02:44 UTC | 9h 15m |
| 2026-06-27 | KAL969 | - | Jun 27, 03:55 UTC | Jun 27, 15:14 UTC | 11h 20m |
| 2026-06-27 | KAL969 | - | Jun 27, 02:45 UTC | Jun 27, 02:59 UTC | 15m |
| 2026-06-26 | KAL434 | ICN → ICN | Jun 26, 09:39 UTC | Jun 27, 00:14 UTC | 14h 35m |
| 2026-06-25 | KAL448 | - | Jun 25, 17:44 UTC | Jun 25, 21:15 UTC | 3h 30m |
| 2026-06-25 | KAL447 | - | Jun 25, 11:10 UTC | Jun 25, 14:44 UTC | 3h 35m |
| 2026-06-24 | KAL402 | - | Jun 24, 22:35 UTC | Jun 25, 08:50 UTC | 10h 15m |
| 2026-06-24 | KAL401 | ICN → SYD | Jun 24, 10:39 UTC | Jun 24, 20:24 UTC | 9h 45m |
| 2026-06-23 | KAL402 | SYD → ICN | Jun 23, 22:29 UTC | Jun 24, 08:24 UTC | 9h 55m |
| 2026-06-23 | KAL401 | ICN → SYD | Jun 23, 10:39 UTC | Jun 23, 20:19 UTC | 9h 40m |
| 2026-06-23 | KAL928 | - | Jun 23, 06:59 UTC | Jun 23, 07:25 UTC | 25m |
| 2026-06-22 | KAL928 | - | Jun 22, 20:39 UTC | Jun 23, 06:19 UTC | 9h 40m |
| 2026-06-22 | KAL927 | - | Jun 22, 06:19 UTC | Jun 22, 18:00 UTC | 11h 40m |
| 2026-06-22 | KAL927 | - | Jun 22, 05:04 UTC | Jun 22, 05:15 UTC | 10m |
| 2026-06-21 | KAL438 | - | Jun 21, 21:05 UTC | Jun 22, 01:49 UTC | 4h 45m |
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 HL8754 page for operator, model, and routing details .