sensors Mode-S transponder
71C290
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL8290 · BOEING 737-700
- Hex
- 71C290
- Octal
- 34341220
- Decimal
- 7,455,376
- Country
- KR
- Tail
- HL8290
- Type
- B737
- Flights observed
- 36
- Distinct callsigns
- 1
- Country
- KR
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 71C290 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| HL8290 | - | 36 | 2026-07-13 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | HL8290 | - | Jul 13, 22:20 UTC | Jul 14, 06:10 UTC | 7h 50m |
| 2026-07-13 | HL8290 | - | Jul 13, 19:45 UTC | Jul 13, 20:00 UTC | 15m |
| 2026-07-10 | HL8290 | BED → HPN | Jul 10, 13:05 UTC | Jul 10, 13:40 UTC | 35m |
| 2026-07-08 | HL8290 | - | Jul 8, 16:10 UTC | Jul 8, 22:45 UTC | 6h 35m |
| 2026-07-06 | HL8290 | GMP → EDI | Jul 6, 13:10 UTC | Jul 7, 06:35 UTC | 17h 25m |
| 2026-06-19 | HL8290 | - | Jun 19, 12:29 UTC | Jun 19, 21:59 UTC | 9h 30m |
| 2026-06-19 | HL8290 | - | Jun 19, 05:49 UTC | Jun 19, 10:54 UTC | 5h 5m |
| 2026-06-17 | HL8290 | - | Jun 17, 01:35 UTC | Jun 17, 01:50 UTC | 15m |
| 2026-06-16 | HL8290 | BGR → LGB | Jun 16, 19:10 UTC | Jun 17, 00:50 UTC | 5h 41m |
| 2026-06-16 | HL8290 | - | Jun 16, 10:04 UTC | Jun 16, 18:20 UTC | 8h 15m |
| 2026-06-15 | HL8290 | - | Jun 15, 06:40 UTC | Jun 15, 08:15 UTC | 1h 35m |
| 2026-06-11 | HL8290 | GMP → LBG | Jun 11, 22:50 UTC | Jun 12, 15:00 UTC | 16h 10m |
| 2026-06-03 | HL8290 | - | Jun 3, 18:20 UTC | Jun 4, 03:35 UTC | 9h 15m |
| 2026-06-03 | HL8290 | - | Jun 3, 10:35 UTC | Jun 3, 17:10 UTC | 6h 35m |
| 2026-06-01 | HL8290 | - | Jun 1, 20:35 UTC | Jun 1, 21:20 UTC | 45m |
| 2026-05-31 | HL8290 | - | May 31, 14:05 UTC | May 31, 18:30 UTC | 4h 25m |
| 2026-05-31 | HL8290 | - | May 31, 12:20 UTC | May 31, 13:00 UTC | 40m |
| 2026-05-19 | HL8290 | - | May 19, 20:45 UTC | May 20, 06:30 UTC | 9h 46m |
| 2026-05-19 | HL8290 | - | May 19, 12:35 UTC | May 19, 19:25 UTC | 6h 50m |
| 2026-05-17 | HL8290 | - | May 17, 20:40 UTC | May 17, 20:50 UTC | 10m |
| 2026-05-17 | HL8290 | - | May 17, 13:20 UTC | May 17, 19:25 UTC | 6h 5m |
| 2026-05-17 | HL8290 | - | May 17, 04:00 UTC | May 17, 12:20 UTC | 8h 20m |
| 2026-05-15 | HL8290 | GMP → GMP | May 15, 00:00 UTC | May 15, 00:55 UTC | 55m |
| 2026-04-24 | HL8290 | - | Apr 24, 10:30 UTC | Apr 24, 10:50 UTC | 20m |
| 2026-04-22 | HL8290 | - | Apr 22, 23:05 UTC | Apr 22, 23:25 UTC | 20m |
| 2026-04-18 | HL8290 | - | Apr 18, 12:20 UTC | Apr 18, 22:40 UTC | 10h 20m |
| 2026-04-18 | HL8290 | - | Apr 18, 07:25 UTC | Apr 18, 07:45 UTC | 20m |
| 2026-04-18 | HL8290 | - | Apr 18, 05:40 UTC | Apr 18, 10:55 UTC | 5h 15m |
| 2026-04-16 | HL8290 | - | Apr 16, 17:30 UTC | Apr 16, 17:44 UTC | 15m |
| 2026-04-16 | HL8290 | - | Apr 16, 15:15 UTC | Apr 16, 16:00 UTC | 45m |
| 2026-04-16 | HL8290 | - | Apr 16, 14:55 UTC | Apr 16, 15:10 UTC | 15m |
| 2026-04-14 | HL8290 | - | Apr 14, 20:55 UTC | Apr 14, 22:05 UTC | 1h 10m |
| 2026-04-14 | HL8290 | - | Apr 14, 18:55 UTC | Apr 14, 20:50 UTC | 1h 55m |
| 2026-04-14 | HL8290 | - | Apr 14, 16:50 UTC | Apr 14, 18:45 UTC | 1h 55m |
| 2026-04-14 | HL8290 | - | Apr 14, 16:30 UTC | Apr 14, 16:45 UTC | 15m |
| 2026-04-13 | HL8290 | JFK → IAD | Apr 13, 13:40 UTC | Apr 13, 14:25 UTC | 45m |
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 HL8290 page for operator, model, and routing details .