sensors Mode-S transponder
71BA04
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL7204 · BOEING 777-300ER
- Hex
- 71BA04
- Octal
- 34335004
- Decimal
- 7,453,188
- Country
- KR
- Tail
- HL7204
- Type
- B77W
- Flights observed
- 181
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 2h ago
Current position
Country allocation
The ICAO 24-bit address 71BA04 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 |
|---|---|---|---|
| KAL908 | - | 22 | 2026-07-02 |
| KAL907 | - | 18 | 2026-07-01 |
| KAL645 | - | 14 | 2026-06-26 |
| KAL902 | Korean Air | 12 | 2026-06-23 |
| KAL036 | - | 12 | 2026-07-08 |
| KAL035 | - | 12 | 2026-07-08 |
| KAL901 | - | 11 | 2026-06-22 |
| KAL646 | Korean Air | 11 | 2026-06-26 |
| KAL034 | Korean Air | 9 | 2026-07-06 |
| KAL094 | - | 7 | 2026-07-14 |
| KAL093 | - | 7 | 2026-07-14 |
| KAL033 | - | 7 | 2026-07-06 |
| KAL006 | - | 4 | 2026-07-10 |
| KAL766 | - | 3 | 2026-07-13 |
| KAL765 | - | 3 | 2026-07-13 |
| KAL086 | Korean Air | 3 | 2026-05-30 |
| KAL085 | Korean Air | 3 | 2026-05-29 |
| KAL005 | - | 3 | 2026-07-09 |
| KAL624 | Korean Air | 2 | 2026-06-12 |
| KAL623 | Korean Air | 2 | 2026-06-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | KAL094 | - | Jul 14, 18:00 UTC | Jul 14, 20:25 UTC | 2h 25m |
| 2026-07-14 | KAL093 | ICN → IAD | Jul 14, 01:45 UTC | Jul 14, 14:55 UTC | 13h 10m |
| 2026-07-13 | KAL766 | - | Jul 13, 06:10 UTC | Jul 13, 08:30 UTC | 2h 20m |
| 2026-07-13 | KAL765 | - | Jul 13, 02:05 UTC | Jul 13, 04:25 UTC | 2h 20m |
| 2026-07-12 | KAL602 | ICN → ICN | Jul 12, 11:25 UTC | Jul 12, 21:05 UTC | 9h 40m |
| 2026-07-11 | KAL094 | IAD → ICN | Jul 11, 17:50 UTC | Jul 12, 07:55 UTC | 14h 5m |
| 2026-07-11 | KAL093 | - | Jul 11, 01:50 UTC | Jul 11, 15:20 UTC | 13h 30m |
| 2026-07-10 | KAL006 | LAS → ICN | Jul 10, 07:10 UTC | Jul 10, 19:05 UTC | 11h 55m |
| 2026-07-09 | KAL005 | ICN → LAS | Jul 9, 12:20 UTC | Jul 9, 23:15 UTC | 10h 55m |
| 2026-07-08 | KAL036 | ATL → ICN | Jul 8, 17:55 UTC | Jul 9, 08:10 UTC | 14h 15m |
| 2026-07-08 | KAL035 | - | Jul 8, 02:05 UTC | Jul 8, 15:15 UTC | 13h 10m |
| 2026-07-06 | KAL034 | ATL → ICN | Jul 6, 16:15 UTC | Jul 7, 06:25 UTC | 14h 10m |
| 2026-07-06 | KAL033 | ICN → ATL | Jul 6, 00:40 UTC | Jul 6, 13:45 UTC | 13h 5m |
| 2026-07-05 | KAL006 | LAS → ICN | Jul 5, 06:55 UTC | Jul 5, 19:10 UTC | 12h 15m |
| 2026-07-04 | KAL005 | ICN → LAS | Jul 4, 12:15 UTC | Jul 4, 23:05 UTC | 10h 50m |
| 2026-07-03 | KAL094 | IAD → ICN | Jul 3, 17:50 UTC | Jul 4, 07:55 UTC | 14h 5m |
| 2026-07-03 | KAL093 | ICN → IAD | Jul 3, 01:55 UTC | Jul 3, 15:10 UTC | 13h 15m |
| 2026-07-02 | KAL908 | - | Jul 2, 07:10 UTC | Jul 2, 07:40 UTC | 30m |
| 2026-07-01 | KAL908 | - | Jul 1, 19:50 UTC | Jul 2, 00:15 UTC | 4h 25m |
| 2026-07-01 | KAL907 | - | Jul 1, 03:40 UTC | Jul 1, 15:45 UTC | 12h 5m |
| 2026-07-01 | KAL907 | - | Jul 1, 02:30 UTC | Jul 1, 02:45 UTC | 15m |
| 2026-06-30 | KAL908 | - | Jun 30, 06:30 UTC | Jun 30, 07:00 UTC | 30m |
| 2026-06-29 | KAL908 | - | Jun 29, 19:05 UTC | Jun 30, 05:40 UTC | 10h 36m |
| 2026-06-29 | KAL907 | - | Jun 29, 03:34 UTC | Jun 29, 15:45 UTC | 12h 10m |
| 2026-06-29 | KAL907 | - | Jun 29, 02:25 UTC | Jun 29, 02:39 UTC | 15m |
| 2026-06-27 | KAL908 | - | Jun 27, 19:09 UTC | Jun 28, 06:49 UTC | 11h 40m |
| 2026-06-27 | KAL907 | - | Jun 27, 02:39 UTC | Jun 27, 16:20 UTC | 13h 40m |
| 2026-06-26 | KAL646 | SIN → ICN | Jun 26, 21:10 UTC | Jun 27, 00:00 UTC | 2h 50m |
| 2026-06-26 | KAL645 | - | Jun 26, 15:20 UTC | Jun 26, 15:34 UTC | 15m |
| 2026-06-26 | KAL645 | - | Jun 26, 10:10 UTC | Jun 26, 12:44 UTC | 2h 35m |
| 2026-06-25 | KAL034 | ATL → ICN | Jun 25, 15:59 UTC | Jun 26, 06:29 UTC | 14h 30m |
| 2026-06-25 | KAL033 | ICN → ATL | Jun 25, 00:40 UTC | Jun 25, 13:14 UTC | 12h 35m |
| 2026-06-24 | KAL2002 | HKG → ICN | Jun 24, 04:34 UTC | Jun 24, 07:34 UTC | 3h 0m |
| 2026-06-24 | KAL2001 | ICN → HKG | Jun 24, 02:09 UTC | Jun 24, 02:24 UTC | 15m |
| 2026-06-23 | KAL2001 | ICN → HKG | Jun 23, 23:24 UTC | Jun 24, 01:34 UTC | 2h 10m |
| 2026-06-23 | KAL902 | CDG → ICN | Jun 23, 05:54 UTC | Jun 23, 06:24 UTC | 30m |
| 2026-06-22 | KAL902 | CDG → ICN | Jun 22, 19:00 UTC | Jun 23, 05:04 UTC | 10h 5m |
| 2026-06-22 | KAL901 | - | Jun 22, 04:04 UTC | Jun 22, 16:14 UTC | 12h 10m |
| 2026-06-22 | KAL901 | - | Jun 22, 02:50 UTC | Jun 22, 02:59 UTC | 10m |
| 2026-06-21 | KAL646 | SIN → ICN | Jun 21, 20:50 UTC | Jun 21, 23:34 UTC | 2h 45m |
| 2026-06-21 | KAL645 | - | Jun 21, 15:15 UTC | Jun 21, 15:40 UTC | 25m |
| 2026-06-21 | KAL645 | - | Jun 21, 09:59 UTC | Jun 21, 12:19 UTC | 2h 20m |
| 2026-06-21 | KAL908 | - | Jun 21, 06:04 UTC | Jun 21, 06:35 UTC | 30m |
| 2026-06-20 | KAL908 | - | Jun 20, 18:59 UTC | Jun 21, 05:15 UTC | 10h 15m |
| 2026-06-20 | KAL907 | - | Jun 20, 03:39 UTC | Jun 20, 16:09 UTC | 12h 30m |
| 2026-06-20 | KAL907 | - | Jun 20, 02:24 UTC | Jun 20, 02:40 UTC | 15m |
| 2026-06-18 | KAL094 | IAD → ICN | Jun 18, 17:45 UTC | Jun 19, 08:04 UTC | 14h 19m |
| 2026-06-18 | KAL093 | ICN → IAD | Jun 18, 02:00 UTC | Jun 18, 14:50 UTC | 12h 50m |
| 2026-06-16 | KAL094 | IAD → ICN | Jun 16, 17:45 UTC | Jun 17, 08:20 UTC | 14h 36m |
| 2026-06-16 | KAL093 | ICN → IAD | Jun 16, 01:55 UTC | Jun 16, 15:00 UTC | 13h 5m |
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 HL7204 page for operator, model, and routing details .