sensors Mode-S transponder
71C561
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8561 · AIRBUS A-330-300
- Hex
- 71C561
- Octal
- 34342541
- Decimal
- 7,456,097
- Country
- KR
- Tail
- HL8561
- Type
- A333
- Flights observed
- 75
- Distinct callsigns
- 13
- Country
- KR
- Last broadcast
- 23d ago
Last known position
Country allocation
The ICAO 24-bit address 71C561 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| TWB643 | Tway Airlines | 13 | 2026-05-05 |
| TWB162 | Tway Airlines | 12 | 2026-05-04 |
| TWB532 | Tway Airlines | 11 | 2026-05-06 |
| TWB161 | Tway Airlines | 11 | 2026-05-04 |
| TWB644 | Tway Airlines | 10 | 2026-05-05 |
| TWB531 | Tway Airlines | 9 | 2026-05-05 |
| TWB156 | Tway Airlines | 2 | 2026-04-29 |
| TWB155 | Tway Airlines | 2 | 2026-04-29 |
| TWB502 | Tway Airlines | 1 | 2026-04-28 |
| TWB501 | Tway Airlines | 1 | 2026-04-27 |
| TWB302 | Tway Airlines | 1 | 2026-05-04 |
| TWB301 | Tway Airlines | 1 | 2026-05-03 |
| TWB101F | - | 1 | 2026-05-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-06 | TWB101F | - | May 6, 16:45 UTC | May 6, 18:30 UTC | 1h 44m |
| 2026-05-06 | TWB532 | YVR → ICN | May 6, 00:40 UTC | May 6, 11:50 UTC | 11h 10m |
| 2026-05-05 | TWB531 | ICN → YVR | May 5, 11:55 UTC | May 5, 21:20 UTC | 9h 25m |
| 2026-05-05 | TWB644 | HKG → ICN | May 5, 05:35 UTC | May 5, 08:25 UTC | 2h 50m |
| 2026-05-05 | TWB643 | ICN → HKG | May 5, 03:10 UTC | May 5, 03:30 UTC | 20m |
| 2026-05-05 | TWB643 | ICN → HKG | May 5, 00:15 UTC | May 5, 02:35 UTC | 2h 20m |
| 2026-05-04 | TWB162 | SIN → ICN | May 4, 18:30 UTC | May 4, 21:25 UTC | 2h 56m |
| 2026-05-04 | TWB161 | ICN → SIN | May 4, 07:10 UTC | May 4, 13:05 UTC | 5h 55m |
| 2026-05-04 | TWB302 | KIX → ICN | May 4, 03:05 UTC | May 4, 04:24 UTC | 1h 20m |
| 2026-05-03 | TWB301 | ICN → KIX | May 3, 23:20 UTC | May 4, 00:50 UTC | 1h 30m |
| 2026-05-03 | TWB532 | YVR → ICN | May 3, 00:35 UTC | May 3, 12:05 UTC | 11h 29m |
| 2026-05-02 | TWB531 | ICN → YVR | May 2, 13:05 UTC | May 2, 21:30 UTC | 8h 25m |
| 2026-05-02 | TWB531 | ICN → YVR | May 2, 12:05 UTC | May 2, 12:30 UTC | 25m |
| 2026-05-02 | TWB644 | HKG → ICN | May 2, 05:35 UTC | May 2, 08:30 UTC | 2h 55m |
| 2026-05-02 | TWB643 | ICN → HKG | May 2, 00:15 UTC | May 2, 03:30 UTC | 3h 15m |
| 2026-05-01 | TWB532 | YVR → ICN | May 1, 12:00 UTC | May 1, 12:25 UTC | 25m |
| 2026-05-01 | TWB532 | YVR → ICN | May 1, 00:45 UTC | May 1, 10:55 UTC | 10h 10m |
| 2026-04-30 | TWB531 | ICN → YVR | Apr 30, 12:25 UTC | Apr 30, 21:40 UTC | 9h 15m |
| 2026-04-30 | TWB644 | HKG → ICN | Apr 30, 06:25 UTC | Apr 30, 08:25 UTC | 2h 0m |
| 2026-04-30 | TWB644 | HKG → ICN | Apr 30, 05:40 UTC | Apr 30, 05:50 UTC | 10m |
| 2026-04-30 | TWB643 | ICN → HKG | Apr 30, 00:05 UTC | Apr 30, 03:30 UTC | 3h 25m |
| 2026-04-29 | TWB156 | CGK → ICN | Apr 29, 17:01 UTC | Apr 29, 21:45 UTC | 4h 45m |
| 2026-04-29 | TWB156 | CGK → ICN | Apr 29, 15:15 UTC | Apr 29, 15:25 UTC | 10m |
| 2026-04-29 | TWB155 | ICN → CGK | Apr 29, 13:10 UTC | Apr 29, 13:20 UTC | 10m |
| 2026-04-29 | TWB155 | ICN → CGK | Apr 29, 06:25 UTC | Apr 29, 11:35 UTC | 5h 11m |
| 2026-04-28 | TWB502 | SYD → ICN | Apr 28, 02:05 UTC | Apr 28, 12:15 UTC | 10h 10m |
| 2026-04-27 | TWB501 | ICN → SYD | Apr 27, 13:30 UTC | Apr 27, 23:25 UTC | 9h 55m |
| 2026-04-27 | TWB644 | HKG → ICN | Apr 27, 05:40 UTC | Apr 27, 08:40 UTC | 3h 0m |
| 2026-04-27 | TWB643 | ICN → HKG | Apr 27, 00:15 UTC | Apr 27, 03:30 UTC | 3h 15m |
| 2026-04-26 | TWB162 | SIN → ICN | Apr 26, 18:20 UTC | Apr 26, 21:20 UTC | 3h 0m |
| 2026-04-26 | TWB161 | ICN → SIN | Apr 26, 07:10 UTC | Apr 26, 13:10 UTC | 6h 0m |
| 2026-04-24 | TWB532 | YVR → ICN | Apr 24, 00:55 UTC | Apr 24, 12:10 UTC | 11h 15m |
| 2026-04-23 | TWB531 | ICN → YVR | Apr 23, 12:35 UTC | Apr 23, 22:15 UTC | 9h 40m |
| 2026-04-23 | TWB644 | HKG → ICN | Apr 23, 05:40 UTC | Apr 23, 08:35 UTC | 2h 55m |
| 2026-04-23 | TWB643 | ICN → HKG | Apr 23, 00:00 UTC | Apr 23, 03:25 UTC | 3h 25m |
| 2026-04-22 | TWB644 | HKG → ICN | Apr 22, 05:35 UTC | Apr 22, 08:40 UTC | 3h 5m |
| 2026-04-22 | TWB643 | ICN → HKG | Apr 22, 03:05 UTC | Apr 22, 03:30 UTC | 25m |
| 2026-04-22 | TWB643 | ICN → HKG | Apr 22, 00:05 UTC | Apr 22, 02:30 UTC | 2h 25m |
| 2026-04-20 | TWB532 | YVR → ICN | Apr 20, 00:40 UTC | Apr 20, 11:45 UTC | 11h 5m |
| 2026-04-19 | TWB531 | ICN → YVR | Apr 19, 12:35 UTC | Apr 19, 22:10 UTC | 9h 35m |
| 2026-04-19 | TWB644 | HKG → ICN | Apr 19, 05:30 UTC | Apr 19, 08:20 UTC | 2h 50m |
| 2026-04-19 | TWB643 | ICN → HKG | Apr 19, 03:30 UTC | Apr 19, 03:45 UTC | 15m |
| 2026-04-19 | TWB643 | ICN → HKG | Apr 19, 00:20 UTC | Apr 19, 02:55 UTC | 2h 35m |
| 2026-04-18 | TWB162 | SIN → ICN | Apr 18, 18:20 UTC | Apr 18, 21:05 UTC | 2h 45m |
| 2026-04-18 | TWB161 | ICN → SIN | Apr 18, 07:25 UTC | Apr 18, 09:20 UTC | 1h 55m |
| 2026-04-18 | TWB161 | ICN → SIN | Apr 18, 07:10 UTC | Apr 18, 13:15 UTC | 6h 5m |
| 2026-04-17 | TWB532 | YVR → ICN | Apr 17, 11:20 UTC | Apr 17, 11:55 UTC | 35m |
| 2026-04-17 | TWB532 | YVR → ICN | Apr 17, 09:40 UTC | Apr 17, 10:25 UTC | 45m |
| 2026-04-17 | TWB532 | YVR → ICN | Apr 17, 03:20 UTC | Apr 17, 05:00 UTC | 1h 41m |
| 2026-04-17 | TWB532 | YVR → ICN | Apr 17, 01:20 UTC | Apr 17, 03:15 UTC | 1h 55m |
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 HL8561 page for operator, model, and routing details .