sensors Mode-S transponder
71C597
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8597 · AIRBUS A-350-900
- Hex
- 71C597
- Octal
- 34342627
- Decimal
- 7,456,151
- Country
- KR
- Tail
- HL8597
- Type
- A359
- Flights observed
- 107
- Distinct callsigns
- 10
- Country
- KR
- Last broadcast
- 5h ago
Current position
Country allocation
The ICAO 24-bit address 71C597 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 10 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| KAL077 | Korean Air | 29 | 2026-05-29 |
| KAL078 | Korean Air | 26 | 2026-05-29 |
| KAL932 | Korean Air | 12 | 2026-05-26 |
| KAL2011 | Korean Air | 12 | 2026-05-06 |
| KAL931 | Korean Air | 8 | 2026-05-25 |
| KAL2012 | Korean Air | 8 | 2026-05-06 |
| KAL752 | Korean Air | 5 | 2026-05-28 |
| KAL751 | Korean Air | 5 | 2026-05-28 |
| KE752 | Korean Air | 1 | 2026-05-24 |
| KE751 | Korean Air | 1 | 2026-05-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | KAL078 | YYZ → ICN | May 29, 16:50 UTC | May 30, 00:00 UTC | 7h 10m |
| 2026-05-29 | KAL077 | ICN → YYZ | May 29, 01:05 UTC | May 29, 13:55 UTC | 12h 50m |
| 2026-05-28 | KAL752 | NGO → ICN | May 28, 17:45 UTC | May 28, 19:45 UTC | 2h 0m |
| 2026-05-28 | KAL751 | ICN → NGO | May 28, 12:00 UTC | May 28, 14:05 UTC | 2h 5m |
| 2026-05-27 | KAL078 | YYZ → ICN | May 27, 16:45 UTC | May 28, 06:55 UTC | 14h 10m |
| 2026-05-27 | KAL077 | ICN → YYZ | May 27, 01:09 UTC | May 27, 13:55 UTC | 12h 46m |
| 2026-05-26 | KAL932 | FCO → ICN | May 26, 06:10 UTC | May 26, 06:34 UTC | 25m |
| 2026-05-25 | KAL932 | FCO → ICN | May 25, 19:44 UTC | May 26, 05:20 UTC | 9h 35m |
| 2026-05-25 | KAL931 | ICN → FCO | May 25, 04:40 UTC | May 25, 16:50 UTC | 12h 10m |
| 2026-05-24 | KE752 | NGO → ICN | May 24, 17:30 UTC | May 24, 19:15 UTC | 1h 45m |
| 2026-05-24 | KE751 | ICN → NGO | May 24, 12:15 UTC | May 24, 13:55 UTC | 1h 40m |
| 2026-05-23 | KAL078 | YYZ → ICN | May 23, 16:50 UTC | May 24, 06:20 UTC | 13h 31m |
| 2026-05-23 | KAL077 | ICN → YYZ | May 23, 01:05 UTC | May 23, 13:30 UTC | 12h 25m |
| 2026-05-21 | KAL078 | YYZ → ICN | May 21, 16:45 UTC | May 22, 06:35 UTC | 13h 50m |
| 2026-05-21 | KAL077 | ICN → YYZ | May 21, 01:10 UTC | May 21, 13:30 UTC | 12h 20m |
| 2026-05-20 | KAL752 | NGO → ICN | May 20, 17:15 UTC | May 20, 19:20 UTC | 2h 5m |
| 2026-05-20 | KAL751 | ICN → NGO | May 20, 12:00 UTC | May 20, 13:50 UTC | 1h 50m |
| 2026-05-19 | KAL078 | YYZ → ICN | May 19, 17:00 UTC | May 20, 06:55 UTC | 13h 56m |
| 2026-05-19 | KAL077 | ICN → YYZ | May 19, 01:10 UTC | May 19, 13:50 UTC | 12h 40m |
| 2026-05-18 | KAL752 | NGO → ICN | May 18, 17:15 UTC | May 18, 19:15 UTC | 1h 59m |
| 2026-05-18 | KAL751 | ICN → NGO | May 18, 11:55 UTC | May 18, 13:45 UTC | 1h 50m |
| 2026-05-17 | KAL078 | YYZ → ICN | May 17, 16:45 UTC | May 18, 06:20 UTC | 13h 35m |
| 2026-05-17 | KAL077 | ICN → YYZ | May 17, 01:05 UTC | May 17, 13:35 UTC | 12h 30m |
| 2026-05-16 | KAL752 | NGO → ICN | May 16, 17:15 UTC | May 16, 19:00 UTC | 1h 45m |
| 2026-05-16 | KAL751 | ICN → NGO | May 16, 11:51 UTC | May 16, 13:46 UTC | 1h 55m |
| 2026-05-15 | KAL078 | YYZ → ICN | May 15, 17:00 UTC | May 16, 06:35 UTC | 13h 36m |
| 2026-05-15 | KAL077 | ICN → YYZ | May 15, 01:15 UTC | May 15, 14:20 UTC | 13h 5m |
| 2026-05-14 | KAL932 | FCO → ICN | May 14, 06:35 UTC | May 14, 06:55 UTC | 20m |
| 2026-05-13 | KAL932 | FCO → ICN | May 13, 20:10 UTC | May 13, 23:35 UTC | 3h 25m |
| 2026-05-13 | KAL931 | ICN → FCO | May 13, 10:10 UTC | May 13, 17:20 UTC | 7h 10m |
| 2026-05-11 | KAL078 | YYZ → ICN | May 11, 17:05 UTC | May 12, 06:55 UTC | 13h 50m |
| 2026-05-11 | KAL077 | ICN → YYZ | May 11, 01:05 UTC | May 11, 13:20 UTC | 12h 15m |
| 2026-05-10 | KAL752 | NGO → ICN | May 10, 17:30 UTC | May 10, 19:35 UTC | 2h 5m |
| 2026-05-10 | KAL751 | ICN → NGO | May 10, 11:55 UTC | May 10, 13:40 UTC | 1h 45m |
| 2026-05-09 | KAL078 | YYZ → ICN | May 9, 16:50 UTC | May 10, 06:40 UTC | 13h 50m |
| 2026-05-09 | KAL077 | ICN → YYZ | May 9, 01:15 UTC | May 9, 13:25 UTC | 12h 10m |
| 2026-05-07 | KAL078 | YYZ → ICN | May 7, 16:40 UTC | May 8, 07:09 UTC | 14h 29m |
| 2026-05-07 | KAL077 | ICN → YYZ | May 7, 01:10 UTC | May 7, 13:45 UTC | 12h 35m |
| 2026-05-06 | KAL2012 | HKG → ICN | May 6, 17:00 UTC | May 6, 19:55 UTC | 2h 54m |
| 2026-05-06 | KAL2011 | ICN → HKG | May 6, 13:45 UTC | May 6, 14:10 UTC | 25m |
| 2026-05-06 | KAL2011 | ICN → HKG | May 6, 11:05 UTC | May 6, 13:10 UTC | 2h 5m |
| 2026-05-05 | KAL078 | YYZ → ICN | May 5, 16:50 UTC | May 6, 07:10 UTC | 14h 20m |
| 2026-05-05 | KAL077 | ICN → YYZ | May 5, 01:00 UTC | May 5, 13:10 UTC | 12h 10m |
| 2026-05-04 | KAL2012 | HKG → ICN | May 4, 17:00 UTC | May 4, 19:50 UTC | 2h 51m |
| 2026-05-04 | KAL2011 | ICN → HKG | May 4, 14:20 UTC | May 4, 14:40 UTC | 20m |
| 2026-05-04 | KAL2011 | ICN → HKG | May 4, 11:25 UTC | May 4, 13:45 UTC | 2h 20m |
| 2026-05-03 | KAL078 | YYZ → ICN | May 3, 16:45 UTC | May 4, 07:25 UTC | 14h 40m |
| 2026-05-03 | KAL077 | ICN → YYZ | May 3, 01:05 UTC | May 3, 13:20 UTC | 12h 14m |
| 2026-05-02 | KAL2012 | HKG → ICN | May 2, 16:50 UTC | May 2, 19:40 UTC | 2h 50m |
| 2026-05-02 | KAL2011 | ICN → HKG | May 2, 14:10 UTC | May 2, 14:30 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 HL8597 page for operator, model, and routing details .