sensors Mode-S transponder
71C043
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8043 · BOEING 777-200LR
- Hex
- 71C043
- Octal
- 34340103
- Decimal
- 7,454,787
- Country
- KR
- Tail
- HL8043
- Type
- B77L
- Flights observed
- 246
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address 71C043 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 |
|---|---|---|---|
| KAL251 | - | 27 | 2026-07-10 |
| KAL313 | - | 14 | 2026-06-21 |
| KAL252 | - | 12 | 2026-07-10 |
| KAL278 | Korean Air | 11 | 2026-06-24 |
| KAL277 | - | 10 | 2026-06-24 |
| KAL314 | Korean Air | 8 | 2026-06-21 |
| KAL349 | - | 7 | 2026-07-11 |
| KAL8517 | - | 6 | 2026-06-26 |
| KAL504 | - | 6 | 2026-07-03 |
| KAL249 | - | 6 | 2026-06-20 |
| KAL231 | - | 6 | 2026-06-29 |
| KAL541 | - | 5 | 2026-07-01 |
| KAL530 | Korean Air | 5 | 2026-06-11 |
| KAL9313 | Korean Air | 4 | 2026-05-24 |
| KAL8518 | - | 4 | 2026-06-27 |
| KAL8313 | - | 4 | 2026-07-05 |
| KAL8231 | - | 4 | 2026-07-04 |
| KAL542 | - | 4 | 2026-07-01 |
| KAL503 | - | 4 | 2026-07-02 |
| KAL274 | Korean Air | 4 | 2026-06-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | KAL240 | - | Jul 13, 16:05 UTC | Jul 14, 05:55 UTC | 13h 50m |
| 2026-07-13 | KAL239 | - | Jul 13, 07:50 UTC | Jul 13, 13:35 UTC | 5h 45m |
| 2026-07-12 | KAL239 | ICN → ANC | Jul 12, 17:10 UTC | Jul 13, 06:30 UTC | 13h 20m |
| 2026-07-12 | KAL350 | - | Jul 12, 07:10 UTC | Jul 12, 09:35 UTC | 2h 25m |
| 2026-07-11 | KAL349 | - | Jul 11, 23:15 UTC | Jul 12, 00:55 UTC | 1h 40m |
| 2026-07-11 | KAL349 | - | Jul 11, 20:45 UTC | Jul 11, 21:05 UTC | 20m |
| 2026-07-11 | KAL349 | - | Jul 11, 14:10 UTC | Jul 11, 19:20 UTC | 5h 10m |
| 2026-07-11 | KAL558 | - | Jul 11, 10:20 UTC | Jul 11, 11:15 UTC | 55m |
| 2026-07-11 | KAL557 | - | Jul 11, 06:35 UTC | Jul 11, 07:25 UTC | 50m |
| 2026-07-10 | KAL252 | JFK → ICN | Jul 10, 14:30 UTC | Jul 11, 04:50 UTC | 14h 20m |
| 2026-07-10 | KAL251 | - | Jul 10, 09:10 UTC | Jul 10, 11:30 UTC | 2h 20m |
| 2026-07-09 | KAL251 | - | Jul 9, 23:10 UTC | Jul 10, 06:45 UTC | 7h 35m |
| 2026-07-09 | KAL251 | ICN → ANC | Jul 9, 13:25 UTC | Jul 9, 21:10 UTC | 7h 45m |
| 2026-07-09 | KAL8374 | - | Jul 9, 07:35 UTC | Jul 9, 10:20 UTC | 2h 45m |
| 2026-07-09 | KAL8373 | - | Jul 9, 00:40 UTC | Jul 9, 02:05 UTC | 1h 25m |
| 2026-07-08 | KAL8373 | - | Jul 8, 17:20 UTC | Jul 8, 17:45 UTC | 25m |
| 2026-07-07 | KAL336 | ICN → ICN | Jul 7, 17:10 UTC | Jul 7, 23:50 UTC | 6h 40m |
| 2026-07-07 | KAL282 | ANC → ICN | Jul 7, 03:30 UTC | Jul 7, 11:25 UTC | 7h 55m |
| 2026-07-06 | KAL282 | - | Jul 6, 19:15 UTC | Jul 7, 02:20 UTC | 7h 5m |
| 2026-07-06 | KAL282 | - | Jul 6, 16:05 UTC | Jul 6, 17:45 UTC | 1h 40m |
| 2026-07-06 | KAL281 | - | Jul 6, 01:55 UTC | Jul 6, 14:35 UTC | 12h 40m |
| 2026-07-05 | KAL8314 | HKG → ICN | Jul 5, 09:50 UTC | Jul 5, 12:55 UTC | 3h 5m |
| 2026-07-05 | KAL8313 | - | Jul 5, 07:20 UTC | Jul 5, 07:40 UTC | 20m |
| 2026-07-05 | KAL8313 | - | Jul 5, 04:35 UTC | Jul 5, 06:45 UTC | 2h 10m |
| 2026-07-04 | KAL8232 | - | Jul 4, 12:55 UTC | Jul 5, 02:10 UTC | 13h 15m |
| 2026-07-04 | KAL8231 | ANC → ORD | Jul 4, 04:55 UTC | Jul 4, 10:40 UTC | 5h 45m |
| 2026-07-03 | KAL8231 | ICN → ANC | Jul 3, 17:15 UTC | Jul 4, 00:45 UTC | 7h 30m |
| 2026-07-03 | KAL504 | - | Jul 3, 11:05 UTC | Jul 3, 11:25 UTC | 20m |
| 2026-07-02 | KAL504 | - | Jul 2, 23:55 UTC | Jul 3, 10:10 UTC | 10h 15m |
| 2026-07-02 | KAL504 | - | Jul 2, 20:55 UTC | Jul 2, 21:40 UTC | 45m |
| 2026-07-02 | KAL503 | - | Jul 2, 11:45 UTC | Jul 2, 16:50 UTC | 5h 5m |
| 2026-07-02 | KAL503 | - | Jul 2, 03:35 UTC | Jul 2, 03:50 UTC | 15m |
| 2026-07-01 | KAL542 | - | Jul 1, 23:00 UTC | Jul 1, 23:25 UTC | 25m |
| 2026-07-01 | KAL542 | - | Jul 1, 11:15 UTC | Jul 1, 22:05 UTC | 10h 50m |
| 2026-07-01 | KAL541 | VIE → OSL | Jul 1, 07:25 UTC | Jul 1, 09:15 UTC | 1h 50m |
| 2026-06-30 | KAL541 | - | Jun 30, 18:10 UTC | Jul 1, 04:20 UTC | 10h 10m |
| 2026-06-30 | KAL541 | - | Jun 30, 16:45 UTC | Jun 30, 16:55 UTC | 10m |
| 2026-06-30 | KAL232 | - | Jun 30, 00:20 UTC | Jun 30, 14:25 UTC | 14h 5m |
| 2026-06-29 | KAL231 | - | Jun 29, 16:04 UTC | Jun 29, 21:44 UTC | 5h 40m |
| 2026-06-29 | KAL231 | - | Jun 29, 07:25 UTC | Jun 29, 14:54 UTC | 7h 30m |
| 2026-06-28 | KAL258 | JFK → ICN | Jun 28, 06:44 UTC | Jun 28, 21:20 UTC | 14h 35m |
| 2026-06-27 | KAL257 | - | Jun 27, 21:59 UTC | Jun 28, 04:05 UTC | 6h 5m |
| 2026-06-27 | KAL257 | - | Jun 27, 13:20 UTC | Jun 27, 20:34 UTC | 7h 15m |
| 2026-06-27 | KAL8518 | - | Jun 27, 05:15 UTC | Jun 27, 05:39 UTC | 25m |
| 2026-06-26 | KAL8518 | - | Jun 26, 18:29 UTC | Jun 27, 04:29 UTC | 10h 0m |
| 2026-06-26 | KAL8517 | - | Jun 26, 15:20 UTC | Jun 26, 16:00 UTC | 40m |
| 2026-06-26 | KAL8517 | - | Jun 26, 01:20 UTC | Jun 26, 12:44 UTC | 11h 25m |
| 2026-06-26 | KAL8517 | - | Jun 26, 00:10 UTC | Jun 26, 00:24 UTC | 15m |
| 2026-06-25 | KAL315 | - | Jun 25, 14:29 UTC | Jun 25, 21:25 UTC | 6h 55m |
| 2026-06-24 | KAL278 | YVR → ICN | Jun 24, 21:00 UTC | Jun 25, 07:45 UTC | 10h 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 HL8043 page for operator, model, and routing details .