sensors Mode-S transponder
71C390
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8390 · BOEING 787-9 Dreamliner
- Hex
- 71C390
- Octal
- 34341620
- Decimal
- 7,455,632
- Country
- KR
- Tail
- HL8390
- Type
- B789
- Flights observed
- 198
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- Jul 24, 15:15 UTC
Last known position
Country allocation
The ICAO 24-bit address 71C390 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 |
|---|---|---|---|
| KAL955 | Korean Air | 14 | 2026-07-22 |
| KAL032 | - | 14 | 2026-07-20 |
| KAL031 | Korean Air | 14 | 2026-07-20 |
| KAL956 | Korean Air | 13 | 2026-07-23 |
| KAL480 | Korean Air | 13 | 2026-06-03 |
| KAL498 | - | 8 | 2026-07-17 |
| KAL914 | - | 7 | 2026-06-17 |
| KAL411 | - | 7 | 2026-07-01 |
| KAL913 | - | 6 | 2026-06-16 |
| KAL479 | - | 6 | 2026-07-15 |
| KAL412 | - | 6 | 2026-07-01 |
| KAL076 | - | 6 | 2026-06-30 |
| KAL075 | - | 6 | 2026-06-29 |
| KAL964 | - | 4 | 2026-07-14 |
| KAL922 | - | 4 | 2026-07-04 |
| KAL677 | - | 4 | 2026-07-16 |
| KAL647 | Korean Air | 4 | 2026-05-23 |
| KAL497 | - | 4 | 2026-07-17 |
| KAL468 | - | 4 | 2026-07-09 |
| KAL432 | Korean Air | 4 | 2026-07-23 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | KAL599F | - | Jul 24, 12:25 UTC | Jul 24, 15:15 UTC | 2h 50m |
| 2026-07-23 | KAL432 | DPS → ICN | Jul 23, 07:35 UTC | Jul 23, 22:35 UTC | 15h 0m |
| 2026-07-23 | KAL956 | IST → ICN | Jul 23, 03:55 UTC | Jul 23, 04:10 UTC | 15m |
| 2026-07-22 | KAL956 | IST → ICN | Jul 22, 19:30 UTC | Jul 23, 03:00 UTC | 7h 30m |
| 2026-07-22 | KAL955 | ICN → IST | Jul 22, 16:45 UTC | Jul 22, 17:10 UTC | 25m |
| 2026-07-22 | KAL955 | ICN → IST | Jul 22, 14:45 UTC | Jul 22, 16:10 UTC | 1h 25m |
| 2026-07-22 | KAL706 | NRT → ICN | Jul 22, 00:30 UTC | Jul 22, 02:25 UTC | 1h 55m |
| 2026-07-21 | KAL705 | ICN → NRT | Jul 21, 10:05 UTC | Jul 21, 11:55 UTC | 1h 50m |
| 2026-07-20 | KAL032 | DFW → ICN | Jul 20, 17:35 UTC | Jul 21, 07:15 UTC | 13h 40m |
| 2026-07-20 | KAL031 | ICN → DFW | Jul 20, 01:10 UTC | Jul 20, 13:50 UTC | 12h 40m |
| 2026-07-19 | KAL471 | ICN → SGN | Jul 19, 00:55 UTC | Jul 19, 12:15 UTC | 11h 20m |
| 2026-07-18 | KAL696 | - | Jul 18, 19:00 UTC | Jul 18, 19:15 UTC | 15m |
| 2026-07-18 | KAL696 | - | Jul 18, 13:30 UTC | Jul 18, 15:25 UTC | 1h 55m |
| 2026-07-18 | KAL695 | ICN → KTM | Jul 18, 05:35 UTC | Jul 18, 11:15 UTC | 5h 40m |
| 2026-07-18 | KAL788 | - | Jul 18, 02:00 UTC | Jul 18, 02:55 UTC | 56m |
| 2026-07-17 | KAL787 | - | Jul 17, 23:20 UTC | Jul 18, 00:15 UTC | 55m |
| 2026-07-17 | KAL498 | - | Jul 17, 20:20 UTC | Jul 17, 20:40 UTC | 20m |
| 2026-07-17 | KAL498 | - | Jul 17, 13:40 UTC | Jul 17, 16:34 UTC | 2h 55m |
| 2026-07-17 | KAL497 | ICN → DEL | Jul 17, 04:29 UTC | Jul 17, 11:00 UTC | 6h 30m |
| 2026-07-16 | KAL677 | ICN → ICN | Jul 16, 09:10 UTC | Jul 16, 22:35 UTC | 13h 25m |
| 2026-07-15 | KAL479 | ICN → ICN | Jul 15, 11:10 UTC | Jul 16, 05:40 UTC | 18h 30m |
| 2026-07-15 | KAL887 | ICN → ICN | Jul 15, 02:35 UTC | Jul 15, 07:55 UTC | 5h 20m |
| 2026-07-14 | KAL431 | - | Jul 14, 07:35 UTC | Jul 14, 22:35 UTC | 15h 0m |
| 2026-07-14 | KAL964 | - | Jul 14, 04:20 UTC | Jul 14, 04:45 UTC | 25m |
| 2026-07-13 | KAL964 | - | Jul 13, 18:40 UTC | Jul 14, 03:30 UTC | 8h 50m |
| 2026-07-13 | KAL963 | - | Jul 13, 05:20 UTC | Jul 13, 15:55 UTC | 10h 35m |
| 2026-07-13 | KAL963 | - | Jul 13, 04:15 UTC | Jul 13, 04:30 UTC | 15m |
| 2026-07-12 | KAL678 | ICN → ICN | Jul 12, 09:15 UTC | Jul 12, 22:35 UTC | 13h 20m |
| 2026-07-12 | KAL956 | - | Jul 12, 03:10 UTC | Jul 12, 03:30 UTC | 20m |
| 2026-07-11 | KAL956 | - | Jul 11, 18:35 UTC | Jul 12, 02:15 UTC | 7h 40m |
| 2026-07-11 | KAL955 | - | Jul 11, 15:20 UTC | Jul 11, 15:45 UTC | 25m |
| 2026-07-11 | KAL955 | - | Jul 11, 06:10 UTC | Jul 11, 14:40 UTC | 8h 30m |
| 2026-07-11 | KAL955 | - | Jul 11, 05:01 UTC | Jul 11, 05:15 UTC | 15m |
| 2026-07-11 | KAL788 | - | Jul 11, 01:50 UTC | Jul 11, 02:55 UTC | 1h 5m |
| 2026-07-10 | KAL787 | - | Jul 10, 23:25 UTC | Jul 11, 00:05 UTC | 40m |
| 2026-07-10 | KAL471 | - | Jul 10, 00:25 UTC | Jul 10, 12:25 UTC | 12h 0m |
| 2026-07-09 | KAL468 | ICN → ICN | Jul 9, 11:25 UTC | Jul 9, 22:00 UTC | 10h 35m |
| 2026-07-08 | KAL032 | DFW → ICN | Jul 8, 17:40 UTC | Jul 9, 08:15 UTC | 14h 35m |
| 2026-07-08 | KAL031 | ICN → DFW | Jul 8, 01:00 UTC | Jul 8, 13:10 UTC | 12h 10m |
| 2026-07-07 | KAL492 | - | Jul 7, 15:30 UTC | Jul 7, 20:45 UTC | 5h 15m |
| 2026-07-07 | KAL491 | ICN → RGN | Jul 7, 07:15 UTC | Jul 7, 12:15 UTC | 5h 0m |
| 2026-07-07 | KAL956 | - | Jul 7, 03:30 UTC | Jul 7, 03:55 UTC | 25m |
| 2026-07-06 | KAL956 | - | Jul 6, 18:45 UTC | Jul 7, 02:40 UTC | 7h 55m |
| 2026-07-06 | KAL955 | - | Jul 6, 16:15 UTC | Jul 6, 16:35 UTC | 20m |
| 2026-07-06 | KAL955 | - | Jul 6, 06:00 UTC | Jul 6, 15:35 UTC | 9h 35m |
| 2026-07-06 | KAL788 | - | Jul 6, 01:55 UTC | Jul 6, 03:00 UTC | 1h 5m |
| 2026-07-05 | KAL787 | ICN → FUK | Jul 5, 23:25 UTC | Jul 6, 00:20 UTC | 55m |
| 2026-07-05 | KAL8054 | - | Jul 5, 07:40 UTC | Jul 5, 10:05 UTC | 2h 25m |
| 2026-07-05 | KAL8054 | - | Jul 5, 00:35 UTC | Jul 5, 00:50 UTC | 15m |
| 2026-07-04 | KAL8053 | - | Jul 4, 21:40 UTC | Jul 4, 22:00 UTC | 20m |
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 HL8390 page for operator, model, and routing details .