sensors Mode-S transponder
71C387
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8387 · BOEING 787-9 Dreamliner
- Hex
- 71C387
- Octal
- 34341607
- Decimal
- 7,455,623
- Country
- KR
- Tail
- HL8387
- Type
- B789
- Flights observed
- 86
- Distinct callsigns
- 18
- Country
- KR
- Last broadcast
- 7m ago
Last known position
Country allocation
The ICAO 24-bit address 71C387 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| APZ102 | Air Premiea | 15 | 2026-05-27 |
| APZ101 | Air Premiea | 15 | 2026-05-27 |
| APZ131 | Air Premiea | 10 | 2026-05-12 |
| APZ132 | Air Premiea | 8 | 2026-05-13 |
| APZ112 | Air Premiea | 8 | 2026-05-25 |
| APZ111 | Air Premiea | 8 | 2026-05-25 |
| APZ621 | Air Premiea | 5 | 2026-05-21 |
| APZ136 | Air Premiea | 3 | 2026-05-29 |
| APZ104 | Air Premiea | 3 | 2026-04-20 |
| APZ622 | Air Premiea | 2 | 2026-05-28 |
| APZ135 | Air Premiea | 2 | 2026-05-29 |
| APZ736 | Air Premiea | 1 | 2026-04-19 |
| APZ735 | Air Premiea | 1 | 2026-04-19 |
| APZ732 | Air Premiea | 1 | 2026-05-16 |
| APZ731 | Air Premiea | 1 | 2026-05-16 |
| APZ602 | Air Premiea | 1 | 2026-05-15 |
| APZ601 | Air Premiea | 1 | 2026-05-15 |
| APZ103 | Air Premiea | 1 | 2026-04-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | APZ136 | IAD → ICN | May 29, 17:40 UTC | May 30, 07:45 UTC | 14h 5m |
| 2026-05-29 | APZ135 | ICN → IAD | May 29, 01:20 UTC | May 29, 14:50 UTC | 13h 30m |
| 2026-05-28 | APZ622 | DAD → ICN | May 28, 09:10 UTC | May 28, 19:55 UTC | 10h 45m |
| 2026-05-27 | APZ102 | LAX → ICN | May 27, 18:00 UTC | May 28, 06:40 UTC | 12h 40m |
| 2026-05-27 | APZ101 | ICN → LAX | May 27, 04:19 UTC | May 27, 15:05 UTC | 10h 45m |
| 2026-05-25 | APZ112 | SFO → ICN | May 25, 23:00 UTC | May 26, 10:50 UTC | 11h 50m |
| 2026-05-25 | APZ111 | ICN → SFO | May 25, 09:05 UTC | May 25, 19:15 UTC | 10h 10m |
| 2026-05-24 | APZ102 | LAX → ICN | May 24, 18:05 UTC | May 25, 06:25 UTC | 12h 20m |
| 2026-05-24 | APZ101 | ICN → LAX | May 24, 04:05 UTC | May 24, 14:35 UTC | 10h 30m |
| 2026-05-23 | APZ622 | DAD → ICN | May 23, 09:10 UTC | May 23, 19:55 UTC | 10h 45m |
| 2026-05-22 | APZ102 | LAX → ICN | May 22, 18:00 UTC | May 23, 06:15 UTC | 12h 14m |
| 2026-05-22 | APZ101 | ICN → LAX | May 22, 04:25 UTC | May 22, 14:50 UTC | 10h 25m |
| 2026-05-21 | APZ621 | ICN → DAD | May 21, 09:15 UTC | May 21, 20:00 UTC | 10h 45m |
| 2026-05-20 | APZ102 | LAX → ICN | May 20, 18:05 UTC | May 21, 06:45 UTC | 12h 40m |
| 2026-05-20 | APZ101 | ICN → LAX | May 20, 04:25 UTC | May 20, 14:45 UTC | 10h 21m |
| 2026-05-18 | APZ112 | SFO → ICN | May 18, 22:55 UTC | May 19, 11:05 UTC | 12h 10m |
| 2026-05-18 | APZ111 | ICN → SFO | May 18, 09:10 UTC | May 18, 19:30 UTC | 10h 19m |
| 2026-05-17 | APZ102 | LAX → ICN | May 17, 18:10 UTC | May 18, 06:25 UTC | 12h 15m |
| 2026-05-17 | APZ101 | ICN → LAX | May 17, 04:20 UTC | May 17, 14:50 UTC | 10h 30m |
| 2026-05-16 | APZ621 | ICN → DAD | May 16, 09:06 UTC | May 16, 20:00 UTC | 10h 55m |
| 2026-05-16 | APZ732 | NRT → ICN | May 16, 03:55 UTC | May 16, 05:35 UTC | 1h 40m |
| 2026-05-16 | APZ731 | ICN → NRT | May 16, 00:00 UTC | May 16, 02:10 UTC | 2h 10m |
| 2026-05-15 | APZ602 | BKK → ICN | May 15, 16:05 UTC | May 15, 20:55 UTC | 4h 50m |
| 2026-05-15 | APZ601 | ICN → BKK | May 15, 08:40 UTC | May 15, 13:55 UTC | 5h 15m |
| 2026-05-14 | APZ102 | LAX → ICN | May 14, 18:10 UTC | May 15, 06:40 UTC | 12h 30m |
| 2026-05-14 | APZ101 | ICN → LAX | May 14, 04:15 UTC | May 14, 14:50 UTC | 10h 35m |
| 2026-05-13 | APZ132 | EWR → ICN | May 13, 05:20 UTC | May 13, 19:25 UTC | 14h 5m |
| 2026-05-12 | APZ131 | ICN → EWR | May 12, 12:45 UTC | May 13, 02:15 UTC | 13h 30m |
| 2026-05-12 | APZ112 | SFO → ICN | May 12, 08:15 UTC | May 12, 10:15 UTC | 2h 0m |
| 2026-05-11 | APZ111 | ICN → SFO | May 11, 09:25 UTC | May 11, 19:20 UTC | 9h 55m |
| 2026-05-10 | APZ102 | LAX → ICN | May 10, 18:20 UTC | May 11, 06:30 UTC | 12h 10m |
| 2026-05-10 | APZ101 | ICN → LAX | May 10, 04:25 UTC | May 10, 14:40 UTC | 10h 15m |
| 2026-05-09 | APZ132 | EWR → ICN | May 9, 05:15 UTC | May 9, 19:49 UTC | 14h 35m |
| 2026-05-08 | APZ131 | ICN → EWR | May 8, 13:45 UTC | May 9, 02:35 UTC | 12h 50m |
| 2026-05-07 | APZ621 | ICN → DAD | May 7, 09:15 UTC | May 7, 19:55 UTC | 10h 40m |
| 2026-05-04 | APZ112 | SFO → ICN | May 4, 22:45 UTC | May 5, 10:30 UTC | 11h 45m |
| 2026-05-04 | APZ111 | ICN → SFO | May 4, 09:20 UTC | May 4, 19:30 UTC | 10h 11m |
| 2026-05-03 | APZ102 | LAX → ICN | May 3, 18:05 UTC | May 4, 06:40 UTC | 12h 35m |
| 2026-05-03 | APZ101 | ICN → LAX | May 3, 04:10 UTC | May 3, 14:55 UTC | 10h 45m |
| 2026-05-02 | APZ621 | ICN → DAD | May 2, 09:15 UTC | May 2, 20:15 UTC | 11h 0m |
| 2026-05-01 | APZ102 | LAX → ICN | May 1, 18:10 UTC | May 2, 06:55 UTC | 12h 45m |
| 2026-05-01 | APZ101 | ICN → LAX | May 1, 05:25 UTC | May 1, 14:45 UTC | 9h 20m |
| 2026-05-01 | APZ101 | ICN → LAX | May 1, 04:15 UTC | May 1, 04:45 UTC | 30m |
| 2026-04-30 | APZ621 | ICN → DAD | Apr 30, 09:10 UTC | Apr 30, 19:45 UTC | 10h 35m |
| 2026-04-29 | APZ102 | LAX → ICN | Apr 29, 17:55 UTC | Apr 30, 06:30 UTC | 12h 34m |
| 2026-04-29 | APZ101 | ICN → LAX | Apr 29, 04:20 UTC | Apr 29, 14:25 UTC | 10h 6m |
| 2026-04-28 | APZ132 | EWR → ICN | Apr 28, 05:05 UTC | Apr 28, 19:55 UTC | 14h 50m |
| 2026-04-27 | APZ131 | ICN → EWR | Apr 27, 13:10 UTC | Apr 28, 02:10 UTC | 13h 0m |
| 2026-04-27 | APZ136 | IAD → ICN | Apr 27, 08:05 UTC | Apr 27, 08:35 UTC | 30m |
| 2026-04-26 | APZ136 | IAD → ICN | Apr 26, 17:30 UTC | Apr 27, 07:30 UTC | 14h 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 HL8387 page for operator, model, and routing details .