sensors Mode-S transponder
71BC36
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL7436 · BOEING 747-400
- Hex
- 71BC36
- Octal
- 34336066
- Decimal
- 7,453,750
- Country
- KR
- Tail
- HL7436
- Type
- B744
- Flights observed
- 261
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 43m ago
Current position
Country allocation
The ICAO 24-bit address 71BC36 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 |
|---|---|---|---|
| AIH242 | Alpine Air Chile | 18 | 2026-06-14 |
| AIH286 | Alpine Air Chile | 16 | 2026-06-12 |
| AIH793 | - | 12 | 2026-07-13 |
| AIH587 | - | 12 | 2026-07-08 |
| AIH248 | - | 12 | 2026-06-25 |
| AIH967 | - | 10 | 2026-06-13 |
| AIH794 | - | 10 | 2026-07-13 |
| AIH969 | - | 9 | 2026-07-03 |
| AIH954 | - | 9 | 2026-07-12 |
| AIH285 | Alpine Air Chile | 9 | 2026-06-12 |
| AIH798 | - | 8 | 2026-06-08 |
| AIH797 | - | 8 | 2026-06-08 |
| AIH775 | - | 8 | 2026-07-02 |
| AIH588 | - | 8 | 2026-07-09 |
| AIH396 | - | 8 | 2026-06-23 |
| AIH247 | - | 8 | 2026-06-25 |
| AIH244 | Alpine Air Chile | 8 | 2026-05-26 |
| AIH952 | - | 7 | 2026-06-27 |
| AIH395 | - | 7 | 2026-07-14 |
| AIH970 | - | 6 | 2026-07-03 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | AIH395 | - | Jul 14, 03:40 UTC | Jul 14, 05:30 UTC | 1h 50m |
| 2026-07-13 | AIH794 | - | Jul 13, 22:55 UTC | Jul 13, 23:15 UTC | 20m |
| 2026-07-13 | AIH794 | - | Jul 13, 12:25 UTC | Jul 13, 22:05 UTC | 9h 40m |
| 2026-07-13 | AIH793 | - | Jul 13, 09:00 UTC | Jul 13, 10:05 UTC | 1h 5m |
| 2026-07-12 | AIH793 | ICN → STN | Jul 12, 15:05 UTC | Jul 13, 06:30 UTC | 15h 25m |
| 2026-07-12 | AIH954 | HKG → ICN | Jul 12, 02:01 UTC | Jul 12, 05:05 UTC | 3h 5m |
| 2026-07-11 | AIH954 | - | Jul 11, 22:20 UTC | Jul 11, 23:05 UTC | 45m |
| 2026-07-11 | AIH954 | - | Jul 11, 21:25 UTC | Jul 11, 21:35 UTC | 10m |
| 2026-07-11 | AIH953 | - | Jul 11, 15:35 UTC | Jul 11, 15:55 UTC | 20m |
| 2026-07-10 | AIH794 | - | Jul 10, 12:55 UTC | Jul 10, 14:55 UTC | 2h 0m |
| 2026-07-10 | AIH793 | - | Jul 10, 09:20 UTC | Jul 10, 10:20 UTC | 1h 0m |
| 2026-07-09 | AIH793 | ICN → STN | Jul 9, 15:20 UTC | Jul 10, 06:55 UTC | 15h 35m |
| 2026-07-09 | AIH588 | - | Jul 9, 05:15 UTC | Jul 9, 05:35 UTC | 20m |
| 2026-07-08 | AIH588 | - | Jul 8, 18:30 UTC | Jul 9, 04:25 UTC | 9h 55m |
| 2026-07-08 | AIH587 | JFK → BRU | Jul 8, 08:40 UTC | Jul 8, 15:35 UTC | 6h 55m |
| 2026-07-07 | AIH587 | - | Jul 7, 23:25 UTC | Jul 8, 05:40 UTC | 6h 15m |
| 2026-07-07 | AIH587 | ICN → ANC | Jul 7, 14:20 UTC | Jul 7, 21:55 UTC | 7h 35m |
| 2026-07-07 | AIH588 | - | Jul 7, 05:05 UTC | Jul 7, 05:30 UTC | 25m |
| 2026-07-06 | AIH588 | - | Jul 6, 18:15 UTC | Jul 7, 04:15 UTC | 10h 0m |
| 2026-07-06 | AIH587 | JFK → BRU | Jul 6, 09:05 UTC | Jul 6, 15:35 UTC | 6h 30m |
| 2026-07-05 | AIH587 | - | Jul 5, 23:30 UTC | Jul 6, 05:45 UTC | 6h 15m |
| 2026-07-05 | AIH587 | ICN → ANC | Jul 5, 14:20 UTC | Jul 5, 21:50 UTC | 7h 30m |
| 2026-07-05 | AIH938 | ICN → ICN | Jul 5, 01:45 UTC | Jul 5, 07:30 UTC | 5h 45m |
| 2026-07-04 | AIH2931 | - | Jul 4, 09:30 UTC | Jul 4, 23:00 UTC | 13h 30m |
| 2026-07-04 | AIH2941 | ANC → ORD | Jul 4, 00:40 UTC | Jul 4, 06:20 UTC | 5h 40m |
| 2026-07-03 | AIH2941 | ICN → ANC | Jul 3, 15:35 UTC | Jul 3, 23:05 UTC | 7h 30m |
| 2026-07-03 | AIH970 | HKG → ICN | Jul 3, 09:55 UTC | Jul 3, 13:00 UTC | 3h 5m |
| 2026-07-03 | AIH969 | - | Jul 3, 06:15 UTC | Jul 3, 06:45 UTC | 30m |
| 2026-07-03 | AIH969 | - | Jul 3, 03:30 UTC | Jul 3, 05:40 UTC | 2h 10m |
| 2026-07-02 | AIH776 | - | Jul 2, 21:50 UTC | Jul 2, 22:15 UTC | 25m |
| 2026-07-02 | AIH776 | - | Jul 2, 11:20 UTC | Jul 2, 21:00 UTC | 9h 40m |
| 2026-07-02 | AIH775 | VIE → FRA | Jul 2, 06:35 UTC | Jul 2, 07:30 UTC | 55m |
| 2026-07-01 | AIH775 | - | Jul 1, 15:35 UTC | Jul 2, 04:20 UTC | 12h 45m |
| 2026-07-01 | AIH775 | - | Jul 1, 14:30 UTC | Jul 1, 14:50 UTC | 20m |
| 2026-07-01 | AIH970 | HKG → ICN | Jul 1, 05:50 UTC | Jul 1, 08:45 UTC | 2h 55m |
| 2026-07-01 | AIH969 | - | Jul 1, 00:25 UTC | Jul 1, 03:25 UTC | 3h 0m |
| 2026-06-29 | AIH794 | - | Jun 29, 23:25 UTC | Jun 29, 23:44 UTC | 20m |
| 2026-06-29 | AIH794 | - | Jun 29, 12:55 UTC | Jun 29, 22:30 UTC | 9h 35m |
| 2026-06-29 | AIH793 | - | Jun 29, 09:00 UTC | Jun 29, 10:10 UTC | 1h 10m |
| 2026-06-28 | AIH793 | - | Jun 28, 14:45 UTC | Jun 29, 06:24 UTC | 15h 40m |
| 2026-06-28 | AIH954 | HKG → ICN | Jun 28, 03:14 UTC | Jun 28, 06:20 UTC | 3h 5m |
| 2026-06-27 | AIH954 | - | Jun 27, 22:40 UTC | Jun 27, 23:10 UTC | 30m |
| 2026-06-27 | AIH954 | - | Jun 27, 21:44 UTC | Jun 27, 22:09 UTC | 25m |
| 2026-06-27 | AIH953 | - | Jun 27, 15:10 UTC | Jun 27, 18:49 UTC | 3h 40m |
| 2026-06-27 | AIH952 | HKG → ICN | Jun 27, 05:35 UTC | Jun 27, 08:25 UTC | 2h 50m |
| 2026-06-27 | AIH952 | - | Jun 27, 01:15 UTC | Jun 27, 01:39 UTC | 25m |
| 2026-06-27 | AIH952 | - | Jun 27, 00:14 UTC | Jun 27, 00:39 UTC | 25m |
| 2026-06-26 | AIH951 | - | Jun 26, 17:50 UTC | Jun 26, 21:30 UTC | 3h 40m |
| 2026-06-26 | AIH988 | ICN → ICN | Jun 26, 09:05 UTC | Jun 26, 14:44 UTC | 5h 40m |
| 2026-06-25 | AIH247 | ANC → ICN | Jun 25, 21:55 UTC | Jun 26, 06:09 UTC | 8h 15m |
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 HL7436 page for operator, model, and routing details .