sensors Mode-S transponder
71C041
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8041 · BOEING 777-300ER
- Hex
- 71C041
- Octal
- 34340101
- Decimal
- 7,454,785
- Country
- KR
- Tail
- HL8041
- Type
- B77W
- Flights observed
- 75
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 11h ago
Last known position
Country allocation
The ICAO 24-bit address 71C041 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 |
|---|---|---|---|
| KAL907 | Korean Air | 7 | 2026-05-20 |
| KAL908 | Korean Air | 6 | 2026-05-21 |
| KAL094 | Korean Air | 5 | 2026-05-31 |
| KAL006 | - | 5 | 2026-06-02 |
| KAL005 | - | 5 | 2026-06-01 |
| KAL902 | Korean Air | 4 | 2026-05-12 |
| KAL645 | Korean Air | 4 | 2026-05-23 |
| KAL093 | Korean Air | 4 | 2026-05-31 |
| KAL035 | Korean Air | 4 | 2026-06-05 |
| KAL938 | Korean Air | 3 | 2026-05-10 |
| KAL901 | Korean Air | 3 | 2026-05-12 |
| KAL646 | Korean Air | 3 | 2026-05-23 |
| KAL086 | Korean Air | 3 | 2026-05-22 |
| KAL085 | Korean Air | 3 | 2026-05-21 |
| KAL036 | Korean Air | 3 | 2026-06-05 |
| KAL937 | Korean Air | 2 | 2026-05-10 |
| KAL2001 | Korean Air | 2 | 2026-05-23 |
| KAL888 | Korean Air | 1 | 2026-05-15 |
| KAL766 | Korean Air | 1 | 2026-04-24 |
| KAL765 | Korean Air | 1 | 2026-04-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-05 | KAL036 | ATL → ICN | Jun 5, 17:50 UTC | Jun 6, 08:40 UTC | 14h 50m |
| 2026-06-05 | KAL035 | ICN → ATL | Jun 5, 02:10 UTC | Jun 5, 15:10 UTC | 13h 0m |
| 2026-06-03 | KAL036 | ATL → ICN | Jun 3, 18:15 UTC | Jun 4, 08:35 UTC | 14h 20m |
| 2026-06-03 | KAL035 | ICN → ATL | Jun 3, 02:00 UTC | Jun 3, 15:20 UTC | 13h 20m |
| 2026-06-02 | KAL006 | LAS → ICN | Jun 2, 07:00 UTC | Jun 2, 18:30 UTC | 11h 30m |
| 2026-06-01 | KAL005 | ICN → LAS | Jun 1, 12:30 UTC | Jun 1, 22:55 UTC | 10h 25m |
| 2026-05-31 | KAL094 | IAD → ICN | May 31, 18:30 UTC | Jun 1, 08:30 UTC | 14h 0m |
| 2026-05-31 | KAL093 | ICN → IAD | May 31, 10:00 UTC | May 31, 15:15 UTC | 5h 15m |
| 2026-05-29 | KAL034 | ATL → ICN | May 29, 16:30 UTC | May 30, 07:15 UTC | 14h 45m |
| 2026-05-29 | KAL033 | ICN → ATL | May 29, 00:15 UTC | May 29, 14:00 UTC | 13h 45m |
| 2026-05-28 | KAL006 | LAS → ICN | May 28, 07:00 UTC | May 28, 19:40 UTC | 12h 40m |
| 2026-05-27 | KAL005 | ICN → LAS | May 27, 12:20 UTC | May 27, 23:10 UTC | 10h 50m |
| 2026-05-26 | KAL094 | IAD → ICN | May 26, 18:19 UTC | May 27, 09:00 UTC | 14h 40m |
| 2026-05-26 | KAL093 | ICN → IAD | May 26, 02:00 UTC | May 26, 15:39 UTC | 13h 40m |
| 2026-05-25 | KAL006 | LAS → ICN | May 25, 07:05 UTC | May 25, 19:05 UTC | 12h 0m |
| 2026-05-24 | KAL005 | - | May 24, 12:15 UTC | May 24, 21:45 UTC | 9h 30m |
| 2026-05-23 | KAL646 | SIN → ICN | May 23, 20:45 UTC | May 23, 23:40 UTC | 2h 55m |
| 2026-05-23 | KAL645 | PUS → CBO | May 23, 15:20 UTC | May 23, 15:40 UTC | 20m |
| 2026-05-23 | KAL645 | PUS → CBO | May 23, 10:10 UTC | May 23, 12:50 UTC | 2h 40m |
| 2026-05-23 | KAL2002 | HKG → ICN | May 23, 05:10 UTC | May 23, 08:15 UTC | 3h 5m |
| 2026-05-23 | KAL2001 | ICN → HKG | May 23, 02:50 UTC | May 23, 02:55 UTC | 5m |
| 2026-05-23 | KAL2001 | ICN → HKG | May 23, 00:00 UTC | May 23, 02:10 UTC | 2h 10m |
| 2026-05-22 | KAL086 | JFK → ICN | May 22, 05:10 UTC | May 22, 20:05 UTC | 14h 55m |
| 2026-05-21 | KAL085 | ICN → JFK | May 21, 11:25 UTC | May 22, 00:30 UTC | 13h 5m |
| 2026-05-21 | KAL908 | LHR → ICN | May 21, 06:40 UTC | May 21, 07:05 UTC | 25m |
| 2026-05-20 | KAL908 | LHR → ICN | May 20, 19:00 UTC | May 21, 05:50 UTC | 10h 50m |
| 2026-05-20 | KAL907 | ICN → LHR | May 20, 02:40 UTC | May 20, 16:15 UTC | 13h 36m |
| 2026-05-18 | KAL094 | IAD → ICN | May 18, 17:55 UTC | May 19, 09:05 UTC | 15h 9m |
| 2026-05-18 | KAL093 | ICN → IAD | May 18, 01:50 UTC | May 18, 15:10 UTC | 13h 20m |
| 2026-05-17 | KAL908 | LHR → ICN | May 17, 06:55 UTC | May 17, 07:15 UTC | 20m |
| 2026-05-16 | KAL908 | LHR → ICN | May 16, 19:00 UTC | May 17, 00:15 UTC | 5h 15m |
| 2026-05-16 | KAL907 | ICN → LHR | May 16, 10:46 UTC | May 16, 15:40 UTC | 4h 55m |
| 2026-05-16 | KAL907 | ICN → LHR | May 16, 02:10 UTC | May 16, 02:30 UTC | 20m |
| 2026-05-15 | KAL888 | PVG → ICN | May 15, 02:50 UTC | May 15, 07:55 UTC | 5h 5m |
| 2026-05-14 | KAL086 | JFK → ICN | May 14, 05:40 UTC | May 14, 19:15 UTC | 13h 35m |
| 2026-05-13 | KAL085 | ICN → JFK | May 13, 11:10 UTC | May 14, 01:00 UTC | 13h 50m |
| 2026-05-12 | KAL902 | CDG → ICN | May 12, 19:40 UTC | May 12, 23:50 UTC | 4h 10m |
| 2026-05-12 | KAL901 | ICN → CDG | May 12, 11:35 UTC | May 12, 16:30 UTC | 4h 55m |
| 2026-05-11 | KAL646 | SIN → ICN | May 11, 20:45 UTC | May 11, 21:40 UTC | 55m |
| 2026-05-11 | KAL645 | PUS → CBO | May 11, 10:10 UTC | May 11, 13:05 UTC | 2h 55m |
| 2026-05-10 | KAL938 | VIE → ICN | May 10, 16:40 UTC | May 10, 19:40 UTC | 3h 0m |
| 2026-05-10 | KAL937 | ICN → VIE | May 10, 02:04 UTC | May 10, 14:14 UTC | 12h 10m |
| 2026-05-08 | KAL902 | CDG → ICN | May 8, 19:05 UTC | May 9, 05:25 UTC | 10h 20m |
| 2026-05-08 | KAL901 | ICN → CDG | May 8, 04:19 UTC | May 8, 04:39 UTC | 20m |
| 2026-05-07 | KAL646 | SIN → ICN | May 7, 20:55 UTC | May 7, 23:39 UTC | 2h 45m |
| 2026-05-07 | KAL645 | PUS → CBO | May 7, 10:00 UTC | May 7, 15:15 UTC | 5h 15m |
| 2026-05-06 | KAL908 | LHR → ICN | May 6, 19:05 UTC | May 7, 06:00 UTC | 10h 55m |
| 2026-05-06 | KAL907 | ICN → LHR | May 6, 03:40 UTC | May 6, 16:20 UTC | 12h 40m |
| 2026-05-06 | KAL907 | ICN → LHR | May 6, 02:25 UTC | May 6, 02:35 UTC | 10m |
| 2026-05-05 | KAL094 | IAD → ICN | May 5, 08:40 UTC | May 5, 09:05 UTC | 25m |
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 HL8041 page for operator, model, and routing details .