sensors Mode-S transponder
71BC17
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL7417 · BOEING 747-400
- Hex
- 71BC17
- Octal
- 34336027
- Decimal
- 7,453,719
- Country
- KR
- Tail
- HL7417
- Type
- B744
- Flights observed
- 96
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 13d ago
Last known position
Country allocation
The ICAO 24-bit address 71BC17 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 |
|---|---|---|---|
| AIH248 | Alpine Air Chile | 12 | 2026-05-14 |
| AIH247 | Alpine Air Chile | 11 | 2026-05-14 |
| AIH587 | Alpine Air Chile | 8 | 2026-04-18 |
| AIH242 | Alpine Air Chile | 8 | 2026-05-01 |
| AIH969 | - | 6 | 2026-05-08 |
| AIH970 | - | 4 | 2026-05-08 |
| AIH244 | Alpine Air Chile | 4 | 2026-04-28 |
| AIH968 | - | 3 | 2026-05-09 |
| AIH967 | - | 3 | 2026-05-09 |
| AIH282 | Alpine Air Chile | 3 | 2026-05-03 |
| AIH281 | Alpine Air Chile | 3 | 2026-05-04 |
| AIH957 | - | 2 | 2026-05-05 |
| AIH954 | - | 2 | 2026-05-10 |
| AIH952 | - | 2 | 2026-04-25 |
| AIH938 | - | 2 | 2026-05-17 |
| AIH796 | Alpine Air Chile | 2 | 2026-04-22 |
| AIH795 | Alpine Air Chile | 2 | 2026-04-22 |
| AIH794 | - | 2 | 2026-04-20 |
| AIH793 | Alpine Air Chile | 2 | 2026-04-20 |
| AIH776 | - | 2 | 2026-05-07 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-17 | AIH938 | - | May 17, 01:35 UTC | May 17, 07:25 UTC | 5h 50m |
| 2026-05-16 | AIH283 | SFO → ICN | May 16, 10:16 UTC | May 16, 22:15 UTC | 11h 59m |
| 2026-05-16 | AIH284 | ICN → LAX | May 16, 06:16 UTC | May 16, 07:11 UTC | 55m |
| 2026-05-15 | AIH284 | ICN → LAX | May 15, 15:05 UTC | May 16, 01:40 UTC | 10h 35m |
| 2026-05-14 | AIH247 | ATL → ANC | May 14, 20:35 UTC | May 15, 04:10 UTC | 7h 35m |
| 2026-05-14 | AIH247 | ATL → ANC | May 14, 12:05 UTC | May 14, 18:50 UTC | 6h 45m |
| 2026-05-14 | AIH248 | ANC → ORD | May 14, 08:00 UTC | May 14, 09:15 UTC | 1h 15m |
| 2026-05-13 | AIH248 | ANC → ORD | May 13, 23:15 UTC | May 14, 04:35 UTC | 5h 20m |
| 2026-05-13 | AIH248 | ANC → ORD | May 13, 14:10 UTC | May 13, 21:45 UTC | 7h 35m |
| 2026-05-10 | AIH954 | - | May 10, 02:20 UTC | May 10, 05:25 UTC | 3h 5m |
| 2026-05-09 | AIH954 | - | May 9, 22:34 UTC | May 9, 23:25 UTC | 50m |
| 2026-05-09 | AIH953 | - | May 9, 15:30 UTC | May 9, 15:50 UTC | 20m |
| 2026-05-09 | AIH968 | - | May 9, 07:10 UTC | May 9, 10:05 UTC | 2h 55m |
| 2026-05-09 | AIH967 | - | May 9, 04:40 UTC | May 9, 05:05 UTC | 25m |
| 2026-05-09 | AIH967 | - | May 9, 01:50 UTC | May 9, 04:05 UTC | 2h 15m |
| 2026-05-08 | AIH970 | - | May 8, 06:50 UTC | May 8, 09:44 UTC | 2h 55m |
| 2026-05-08 | AIH969 | - | May 8, 01:24 UTC | May 8, 04:29 UTC | 3h 5m |
| 2026-05-07 | AIH776 | - | May 7, 21:10 UTC | May 7, 21:30 UTC | 20m |
| 2026-05-07 | AIH776 | - | May 7, 10:10 UTC | May 7, 20:20 UTC | 10h 10m |
| 2026-05-07 | AIH775 | VIE → FRA | May 7, 06:40 UTC | May 7, 07:40 UTC | 1h 0m |
| 2026-05-06 | AIH775 | - | May 6, 14:20 UTC | May 7, 04:35 UTC | 14h 15m |
| 2026-05-06 | AIH970 | - | May 6, 06:50 UTC | May 6, 09:55 UTC | 3h 5m |
| 2026-05-06 | AIH969 | - | May 6, 04:20 UTC | May 6, 04:35 UTC | 15m |
| 2026-05-06 | AIH969 | - | May 6, 01:30 UTC | May 6, 03:40 UTC | 2h 10m |
| 2026-05-05 | AIH957 | - | May 5, 01:35 UTC | May 5, 08:00 UTC | 6h 25m |
| 2026-05-04 | AIH281 | LAX → ICN | May 4, 04:20 UTC | May 4, 17:00 UTC | 12h 40m |
| 2026-05-03 | AIH282 | ICN → LAX | May 3, 14:55 UTC | May 4, 01:10 UTC | 10h 15m |
| 2026-05-03 | AIH938 | - | May 3, 01:45 UTC | May 3, 07:35 UTC | 5h 49m |
| 2026-05-01 | AIH241 | SEA → ICN | May 1, 20:15 UTC | May 2, 07:15 UTC | 11h 1m |
| 2026-05-01 | AIH242 | ANC → ORD | May 1, 14:15 UTC | May 1, 18:10 UTC | 3h 55m |
| 2026-05-01 | AIH242 | ANC → ORD | May 1, 09:30 UTC | May 1, 11:40 UTC | 2h 10m |
| 2026-05-01 | AIH242 | ANC → ORD | May 1, 01:40 UTC | May 1, 07:05 UTC | 5h 25m |
| 2026-04-30 | AIH242 | ANC → ORD | Apr 30, 14:25 UTC | Apr 30, 22:10 UTC | 7h 45m |
| 2026-04-29 | AIH957 | - | Apr 29, 19:45 UTC | Apr 30, 02:05 UTC | 6h 19m |
| 2026-04-29 | AIH987 | - | Apr 29, 10:50 UTC | Apr 29, 16:50 UTC | 6h 0m |
| 2026-04-28 | AIH243 | SEA → ICN | Apr 28, 18:45 UTC | Apr 29, 06:25 UTC | 11h 40m |
| 2026-04-28 | AIH244 | ANC → ORD | Apr 28, 12:55 UTC | Apr 28, 16:55 UTC | 4h 0m |
| 2026-04-28 | AIH244 | ANC → ORD | Apr 28, 08:35 UTC | Apr 28, 10:35 UTC | 2h 0m |
| 2026-04-27 | AIH244 | ANC → ORD | Apr 27, 23:15 UTC | Apr 28, 05:10 UTC | 5h 55m |
| 2026-04-27 | AIH244 | ANC → ORD | Apr 27, 14:25 UTC | Apr 27, 21:45 UTC | 7h 20m |
| 2026-04-26 | AIH241 | SEA → ICN | Apr 26, 17:35 UTC | Apr 27, 05:10 UTC | 11h 35m |
| 2026-04-26 | AIH242 | ANC → ORD | Apr 26, 11:15 UTC | Apr 26, 14:55 UTC | 3h 40m |
| 2026-04-26 | AIH242 | ANC → ORD | Apr 26, 07:05 UTC | Apr 26, 09:05 UTC | 2h 0m |
| 2026-04-25 | AIH242 | ANC → ORD | Apr 25, 23:05 UTC | Apr 26, 04:35 UTC | 5h 30m |
| 2026-04-25 | AIH242 | ANC → ORD | Apr 25, 14:25 UTC | Apr 25, 21:40 UTC | 7h 15m |
| 2026-04-25 | AIH952 | - | Apr 25, 01:50 UTC | Apr 25, 04:30 UTC | 2h 40m |
| 2026-04-24 | AIH952 | ZGN → HKG | Apr 24, 22:40 UTC | Apr 24, 23:05 UTC | 25m |
| 2026-04-24 | AIH951 | - | Apr 24, 15:05 UTC | Apr 24, 15:45 UTC | 40m |
| 2026-04-22 | AIH796 | FRA → ICN | Apr 22, 23:15 UTC | Apr 22, 23:30 UTC | 15m |
| 2026-04-22 | AIH796 | FRA → ICN | Apr 22, 12:25 UTC | Apr 22, 22:25 UTC | 10h 0m |
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 HL7417 page for operator, model, and routing details .