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
- 93
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 3h ago
Last known 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 | Korean Air | 11 | 2026-05-29 |
| KAL036 | Korean Air | 11 | 2026-05-21 |
| KAL035 | Korean Air | 11 | 2026-05-21 |
| KAL907 | Korean Air | 8 | 2026-05-28 |
| KAL645 | Korean Air | 7 | 2026-05-27 |
| KAL646 | Korean Air | 6 | 2026-05-27 |
| KAL034 | Korean Air | 6 | 2026-05-23 |
| KAL902 | Korean Air | 4 | 2026-05-27 |
| KAL901 | Korean Air | 4 | 2026-05-26 |
| KAL033 | Korean Air | 4 | 2026-05-23 |
| KAL086 | Korean Air | 3 | 2026-05-30 |
| KAL085 | Korean Air | 3 | 2026-05-29 |
| KAL766 | Korean Air | 2 | 2026-04-18 |
| KAL765 | Korean Air | 2 | 2026-04-18 |
| KAL094 | Korean Air | 2 | 2026-05-08 |
| KAL093 | Korean Air | 2 | 2026-05-08 |
| KAL006 | - | 2 | 2026-05-12 |
| KAL874 | - | 1 | 2026-05-17 |
| KAL873 | - | 1 | 2026-05-17 |
| KAL602 | Korean Air | 1 | 2026-04-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | KAL086 | JFK → ICN | May 30, 05:20 UTC | May 30, 12:20 UTC | 7h 0m |
| 2026-05-29 | KAL085 | ICN → JFK | May 29, 11:20 UTC | May 30, 00:50 UTC | 13h 30m |
| 2026-05-29 | KAL908 | LHR → ICN | May 29, 06:15 UTC | May 29, 06:40 UTC | 25m |
| 2026-05-28 | KAL908 | LHR → ICN | May 28, 19:15 UTC | May 29, 05:30 UTC | 10h 15m |
| 2026-05-28 | KAL907 | ICN → LHR | May 28, 03:55 UTC | May 28, 16:50 UTC | 12h 55m |
| 2026-05-28 | KAL907 | ICN → LHR | May 28, 02:40 UTC | May 28, 02:55 UTC | 15m |
| 2026-05-27 | KAL646 | SIN → ICN | May 27, 20:40 UTC | May 27, 23:35 UTC | 2h 55m |
| 2026-05-27 | KAL645 | PUS → CBO | May 27, 15:10 UTC | May 27, 15:20 UTC | 10m |
| 2026-05-27 | KAL645 | PUS → CBO | May 27, 10:05 UTC | May 27, 12:30 UTC | 2h 25m |
| 2026-05-27 | KAL902 | CDG → ICN | May 27, 06:20 UTC | May 27, 06:44 UTC | 25m |
| 2026-05-26 | KAL902 | CDG → ICN | May 26, 18:59 UTC | May 27, 05:29 UTC | 10h 30m |
| 2026-05-26 | KAL901 | ICN → CDG | May 26, 04:04 UTC | May 26, 16:05 UTC | 12h 0m |
| 2026-05-26 | KAL901 | ICN → CDG | May 26, 02:55 UTC | May 26, 03:09 UTC | 15m |
| 2026-05-25 | KAL646 | SIN → ICN | May 25, 20:40 UTC | May 25, 23:40 UTC | 3h 0m |
| 2026-05-25 | KAL645 | PUS → CBO | May 25, 10:00 UTC | May 25, 15:30 UTC | 5h 30m |
| 2026-05-24 | KAL646 | SIN → ICN | May 24, 20:40 UTC | May 24, 23:35 UTC | 2h 55m |
| 2026-05-24 | KAL645 | PUS → CBO | May 24, 10:10 UTC | May 24, 12:35 UTC | 2h 25m |
| 2026-05-23 | KAL034 | ATL → ICN | May 23, 16:10 UTC | May 24, 06:25 UTC | 14h 15m |
| 2026-05-23 | KAL033 | ICN → ATL | May 23, 00:10 UTC | May 23, 12:55 UTC | 12h 44m |
| 2026-05-21 | KAL036 | ATL → ICN | May 21, 17:45 UTC | May 22, 08:30 UTC | 14h 45m |
| 2026-05-21 | KAL035 | ICN → ATL | May 21, 02:15 UTC | May 21, 15:10 UTC | 12h 55m |
| 2026-05-20 | KAL908 | LHR → ICN | May 20, 06:40 UTC | May 20, 07:10 UTC | 30m |
| 2026-05-19 | KAL908 | LHR → ICN | May 19, 19:05 UTC | May 20, 05:45 UTC | 10h 41m |
| 2026-05-19 | KAL907 | ICN → LHR | May 19, 02:35 UTC | May 19, 16:10 UTC | 13h 35m |
| 2026-05-18 | KAL086 | JFK → ICN | May 18, 05:30 UTC | May 18, 20:05 UTC | 14h 34m |
| 2026-05-17 | KAL085 | ICN → JFK | May 17, 11:15 UTC | May 18, 00:30 UTC | 13h 15m |
| 2026-05-17 | KAL874 | - | May 17, 07:15 UTC | May 17, 07:40 UTC | 25m |
| 2026-05-17 | KAL873 | - | May 17, 04:15 UTC | May 17, 04:30 UTC | 15m |
| 2026-05-16 | KAL646 | SIN → ICN | May 16, 20:30 UTC | May 16, 23:20 UTC | 2h 50m |
| 2026-05-16 | KAL645 | PUS → CBO | May 16, 09:56 UTC | May 16, 15:16 UTC | 5h 20m |
| 2026-05-15 | KAL034 | ATL → ICN | May 15, 16:00 UTC | May 16, 06:35 UTC | 14h 36m |
| 2026-05-15 | KAL033 | ICN → ATL | May 15, 00:15 UTC | May 15, 13:25 UTC | 13h 10m |
| 2026-05-13 | KAL036 | ATL → ICN | May 13, 17:40 UTC | May 14, 08:20 UTC | 14h 40m |
| 2026-05-13 | KAL035 | ICN → ATL | May 13, 02:00 UTC | May 13, 15:10 UTC | 13h 10m |
| 2026-05-12 | KAL006 | - | May 12, 07:00 UTC | May 12, 18:50 UTC | 11h 50m |
| 2026-05-11 | KAL005 | - | May 11, 12:15 UTC | May 11, 22:00 UTC | 9h 46m |
| 2026-05-10 | KAL036 | ATL → ICN | May 10, 17:45 UTC | May 11, 08:40 UTC | 14h 55m |
| 2026-05-10 | KAL035 | ICN → ATL | May 10, 02:00 UTC | May 10, 14:40 UTC | 12h 40m |
| 2026-05-08 | KAL094 | IAD → ICN | May 8, 17:25 UTC | May 9, 08:50 UTC | 15h 25m |
| 2026-05-08 | KAL093 | ICN → IAD | May 8, 01:59 UTC | May 8, 14:45 UTC | 12h 45m |
| 2026-05-07 | KAL086 | JFK → ICN | May 7, 05:20 UTC | May 7, 20:00 UTC | 14h 41m |
| 2026-05-06 | KAL085 | ICN → JFK | May 6, 11:20 UTC | May 7, 00:50 UTC | 13h 29m |
| 2026-05-05 | KAL902 | CDG → ICN | May 5, 19:10 UTC | May 6, 06:10 UTC | 11h 0m |
| 2026-05-05 | KAL901 | ICN → CDG | May 5, 03:55 UTC | May 5, 16:10 UTC | 12h 15m |
| 2026-05-04 | KAL646 | SIN → ICN | May 4, 21:15 UTC | May 4, 23:55 UTC | 2h 40m |
| 2026-05-04 | KAL645 | PUS → CBO | May 4, 10:10 UTC | May 4, 15:55 UTC | 5h 45m |
| 2026-05-04 | KAL034 | ATL → ICN | May 4, 06:50 UTC | May 4, 07:15 UTC | 25m |
| 2026-05-03 | KAL034 | ATL → ICN | May 3, 15:50 UTC | May 4, 05:40 UTC | 13h 50m |
| 2026-05-03 | KAL033 | ICN → ATL | May 3, 00:10 UTC | May 3, 12:55 UTC | 12h 44m |
| 2026-05-01 | KAL094 | IAD → ICN | May 1, 18:20 UTC | May 2, 09:20 UTC | 15h 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 HL7204 page for operator, model, and routing details .