sensors Mode-S transponder
71BF83
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL7783 · BOEING 777-300ER
- Hex
- 71BF83
- Octal
- 34337603
- Decimal
- 7,454,595
- Country
- KR
- Tail
- HL7783
- Type
- B77W
- Flights observed
- 91
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 71BF83 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 |
|---|---|---|---|
| KAL038 | Korean Air | 7 | 2026-05-15 |
| KAL037 | Korean Air | 7 | 2026-05-30 |
| KAL651 | Korean Air | 6 | 2026-05-06 |
| KAL652 | Korean Air | 5 | 2026-05-06 |
| KAL092 | Korean Air | 5 | 2026-05-17 |
| KAL091 | Korean Air | 5 | 2026-05-17 |
| KAL946 | Korean Air | 4 | 2026-04-16 |
| KAL945 | Korean Air | 4 | 2026-04-15 |
| KAL624 | Korean Air | 4 | 2026-04-19 |
| KAL623 | Korean Air | 4 | 2026-04-19 |
| KAL475 | Korean Air | 4 | 2026-05-14 |
| KAL437 | Korean Air | 4 | 2026-04-27 |
| KAL9981 | Korean Air | 3 | 2026-04-29 |
| KAL622 | Korean Air | 3 | 2026-04-20 |
| KAL476 | Korean Air | 3 | 2026-05-29 |
| KAL9982 | Korean Air | 2 | 2026-04-30 |
| KAL926 | Korean Air | 2 | 2026-04-19 |
| KAL925 | Korean Air | 2 | 2026-04-18 |
| KAL766 | Korean Air | 2 | 2026-04-17 |
| KAL765 | Korean Air | 2 | 2026-04-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | KAL037 | ICN → ORD | May 30, 02:10 UTC | May 30, 03:40 UTC | 1h 30m |
| 2026-05-29 | KAL476 | SGN → ICN | May 29, 10:25 UTC | May 29, 21:50 UTC | 11h 25m |
| 2026-05-29 | KAL874 | - | May 29, 07:55 UTC | May 29, 08:15 UTC | 20m |
| 2026-05-29 | KAL873 | - | May 29, 04:50 UTC | May 29, 05:00 UTC | 10m |
| 2026-05-17 | KAL092 | BOS → ICN | May 17, 17:25 UTC | May 18, 07:55 UTC | 14h 30m |
| 2026-05-17 | KAL091 | ICN → BOS | May 17, 00:45 UTC | May 17, 14:10 UTC | 13h 26m |
| 2026-05-15 | KAL038 | ORD → ICN | May 15, 17:50 UTC | May 16, 07:16 UTC | 13h 26m |
| 2026-05-15 | KAL037 | ICN → ORD | May 15, 01:55 UTC | May 15, 14:40 UTC | 12h 45m |
| 2026-05-14 | KAL475 | ICN → SGN | May 14, 10:25 UTC | May 14, 22:05 UTC | 11h 40m |
| 2026-05-13 | KAL038 | ORD → ICN | May 13, 17:40 UTC | May 14, 07:10 UTC | 13h 30m |
| 2026-05-13 | KAL037 | ICN → ORD | May 13, 02:20 UTC | May 13, 14:45 UTC | 12h 25m |
| 2026-05-11 | KAL092 | BOS → ICN | May 11, 17:15 UTC | May 12, 08:00 UTC | 14h 45m |
| 2026-05-11 | KAL091 | ICN → BOS | May 11, 00:54 UTC | May 11, 14:05 UTC | 13h 10m |
| 2026-05-09 | KAL092 | BOS → ICN | May 9, 17:15 UTC | May 10, 07:40 UTC | 14h 25m |
| 2026-05-09 | KAL091 | ICN → BOS | May 9, 00:50 UTC | May 9, 13:45 UTC | 12h 55m |
| 2026-05-07 | KAL038 | ORD → ICN | May 7, 17:55 UTC | May 8, 08:34 UTC | 14h 40m |
| 2026-05-07 | KAL037 | ICN → ORD | May 7, 02:05 UTC | May 7, 14:15 UTC | 12h 10m |
| 2026-05-06 | KAL652 | BKK → ICN | May 6, 17:25 UTC | May 6, 22:15 UTC | 4h 49m |
| 2026-05-06 | KAL651 | ICN → BKK | May 6, 10:05 UTC | May 6, 15:00 UTC | 4h 55m |
| 2026-05-05 | KAL038 | ORD → ICN | May 5, 17:30 UTC | May 6, 07:55 UTC | 14h 25m |
| 2026-05-05 | KAL037 | ICN → ORD | May 5, 02:25 UTC | May 5, 14:35 UTC | 12h 10m |
| 2026-05-03 | KAL092 | BOS → ICN | May 3, 17:40 UTC | May 4, 08:35 UTC | 14h 55m |
| 2026-05-03 | KAL091 | ICN → BOS | May 3, 01:00 UTC | May 3, 13:55 UTC | 12h 54m |
| 2026-05-02 | KAL475 | ICN → SGN | May 2, 10:50 UTC | May 2, 22:05 UTC | 11h 15m |
| 2026-05-01 | KAL038 | ORD → ICN | May 1, 17:55 UTC | May 2, 07:50 UTC | 13h 56m |
| 2026-05-01 | KAL037 | ICN → ORD | May 1, 03:35 UTC | May 1, 14:50 UTC | 11h 15m |
| 2026-05-01 | KAL037 | ICN → ORD | May 1, 02:25 UTC | May 1, 02:50 UTC | 25m |
| 2026-04-30 | KAL9982 | OSL → ICN | Apr 30, 04:40 UTC | Apr 30, 04:55 UTC | 15m |
| 2026-04-29 | KAL9982 | OSL → ICN | Apr 29, 19:00 UTC | Apr 30, 03:40 UTC | 8h 39m |
| 2026-04-29 | KAL9981 | ICN → ATH | Apr 29, 05:15 UTC | Apr 29, 16:15 UTC | 11h 1m |
| 2026-04-28 | KAL652 | BKK → ICN | Apr 28, 17:45 UTC | Apr 28, 22:15 UTC | 4h 30m |
| 2026-04-28 | KAL651 | ICN → BKK | Apr 28, 09:45 UTC | Apr 28, 15:05 UTC | 5h 20m |
| 2026-04-28 | KAL881 | ICN → PVG | Apr 28, 00:10 UTC | Apr 28, 05:15 UTC | 5h 5m |
| 2026-04-27 | KAL438 | CGK → ICN | Apr 27, 16:55 UTC | Apr 27, 21:35 UTC | 4h 40m |
| 2026-04-27 | KAL437 | ICN → CGK | Apr 27, 13:00 UTC | Apr 27, 13:15 UTC | 15m |
| 2026-04-27 | KAL437 | ICN → CGK | Apr 27, 06:40 UTC | Apr 27, 11:25 UTC | 4h 45m |
| 2026-04-26 | KAL476 | SGN → ICN | Apr 26, 19:50 UTC | Apr 26, 22:20 UTC | 2h 30m |
| 2026-04-26 | KAL475 | ICN → SGN | Apr 26, 10:40 UTC | Apr 26, 13:20 UTC | 2h 40m |
| 2026-04-25 | KAL092 | BOS → ICN | Apr 25, 17:15 UTC | Apr 26, 08:10 UTC | 14h 55m |
| 2026-04-25 | KAL091 | ICN → BOS | Apr 25, 00:55 UTC | Apr 25, 14:25 UTC | 13h 30m |
| 2026-04-24 | KAL438 | CGK → ICN | Apr 24, 16:55 UTC | Apr 24, 21:35 UTC | 4h 40m |
| 2026-04-24 | KAL437 | ICN → CGK | Apr 24, 12:50 UTC | Apr 24, 13:05 UTC | 15m |
| 2026-04-24 | KAL437 | ICN → CGK | Apr 24, 06:35 UTC | Apr 24, 11:15 UTC | 4h 40m |
| 2026-04-24 | KAL788 | FUK → ICN | Apr 24, 02:05 UTC | Apr 24, 03:05 UTC | 1h 0m |
| 2026-04-23 | KAL787 | ICN → FUK | Apr 23, 23:20 UTC | Apr 23, 23:45 UTC | 25m |
| 2026-04-23 | KAL2982 | - | Apr 23, 04:20 UTC | Apr 23, 04:30 UTC | 10m |
| 2026-04-22 | KAL2982 | - | Apr 22, 18:40 UTC | Apr 23, 03:25 UTC | 8h 45m |
| 2026-04-22 | KAL9981 | ICN → ATH | Apr 22, 13:50 UTC | Apr 22, 16:45 UTC | 2h 55m |
| 2026-04-22 | KAL9981 | ICN → ATH | Apr 22, 05:10 UTC | Apr 22, 05:20 UTC | 10m |
| 2026-04-21 | KAL652 | BKK → ICN | Apr 21, 17:25 UTC | Apr 21, 22:15 UTC | 4h 50m |
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 HL7783 page for operator, model, and routing details .