sensors Mode-S transponder
71BA03
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL7203 · BOEING 777-300ER
- Hex
- 71BA03
- Octal
- 34335003
- Decimal
- 7,453,187
- Country
- KR
- Tail
- HL7203
- Type
- B77W
- Flights observed
- 98
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 5m ago
Current position
Country allocation
The ICAO 24-bit address 71BA03 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 |
|---|---|---|---|
| KAL085 | Korean Air | 12 | 2026-05-20 |
| KAL086 | Korean Air | 11 | 2026-05-21 |
| KAL006 | - | 8 | 2026-05-27 |
| KAL907 | Korean Air | 7 | 2026-05-24 |
| KAL005 | - | 7 | 2026-05-26 |
| KAL908 | Korean Air | 6 | 2026-05-25 |
| KAL902 | Korean Air | 5 | 2026-05-20 |
| KAL901 | Korean Air | 5 | 2026-05-19 |
| KAL094 | Korean Air | 5 | 2026-05-29 |
| KAL035 | Korean Air | 5 | 2026-05-22 |
| KAL093 | Korean Air | 4 | 2026-05-28 |
| KAL036 | Korean Air | 4 | 2026-05-22 |
| KAL034 | Korean Air | 4 | 2026-05-09 |
| KAL622 | Korean Air | 2 | 2026-04-25 |
| KAL621 | Korean Air | 2 | 2026-04-24 |
| KAL2021 | Korean Air | 2 | 2026-04-27 |
| KAL033 | Korean Air | 2 | 2026-05-30 |
| KAL938 | Korean Air | 1 | 2026-05-04 |
| KAL937 | Korean Air | 1 | 2026-05-04 |
| KAL844 | Korean Air | 1 | 2026-05-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | KAL033 | ICN → ATL | May 30, 00:05 UTC | May 30, 12:45 UTC | 12h 40m |
| 2026-05-29 | KAL094 | IAD → ICN | May 29, 08:20 UTC | May 29, 08:50 UTC | 30m |
| 2026-05-28 | KAL094 | IAD → ICN | May 28, 17:40 UTC | May 29, 07:45 UTC | 14h 5m |
| 2026-05-28 | KAL093 | ICN → IAD | May 28, 02:00 UTC | May 28, 15:05 UTC | 13h 5m |
| 2026-05-27 | KAL006 | LAS → ICN | May 27, 07:05 UTC | May 27, 19:50 UTC | 12h 45m |
| 2026-05-26 | KAL005 | ICN → LAS | May 26, 12:24 UTC | May 26, 23:10 UTC | 10h 45m |
| 2026-05-26 | KAL844 | TAO → ICN | May 26, 08:19 UTC | May 26, 08:45 UTC | 25m |
| 2026-05-26 | KAL843 | ICN → TAO | May 26, 04:39 UTC | May 26, 05:00 UTC | 20m |
| 2026-05-26 | KAL744 | NGO → ICN | May 26, 00:35 UTC | May 26, 02:00 UTC | 1h 25m |
| 2026-05-25 | KAL743 | ICN → NGO | May 25, 10:35 UTC | May 25, 11:55 UTC | 1h 20m |
| 2026-05-25 | KAL908 | LHR → ICN | May 25, 07:00 UTC | May 25, 07:25 UTC | 25m |
| 2026-05-24 | KAL908 | LHR → ICN | May 24, 19:10 UTC | May 24, 23:46 UTC | 4h 36m |
| 2026-05-24 | KAL907 | ICN → LHR | May 24, 10:55 UTC | May 24, 15:45 UTC | 4h 50m |
| 2026-05-24 | KAL907 | ICN → LHR | May 24, 02:25 UTC | May 24, 02:40 UTC | 15m |
| 2026-05-22 | KAL036 | ATL → ICN | May 22, 17:45 UTC | May 23, 09:15 UTC | 15h 30m |
| 2026-05-22 | KAL035 | ICN → ATL | May 22, 02:05 UTC | May 22, 15:00 UTC | 12h 55m |
| 2026-05-21 | KAL086 | JFK → ICN | May 21, 05:20 UTC | May 21, 20:35 UTC | 15h 15m |
| 2026-05-20 | KAL085 | ICN → JFK | May 20, 11:40 UTC | May 21, 01:25 UTC | 13h 45m |
| 2026-05-20 | KAL902 | CDG → ICN | May 20, 06:45 UTC | May 20, 07:10 UTC | 25m |
| 2026-05-19 | KAL902 | CDG → ICN | May 19, 19:10 UTC | May 20, 05:50 UTC | 10h 41m |
| 2026-05-19 | KAL901 | ICN → CDG | May 19, 04:25 UTC | May 19, 16:45 UTC | 12h 20m |
| 2026-05-19 | KAL901 | ICN → CDG | May 19, 03:10 UTC | May 19, 03:25 UTC | 15m |
| 2026-05-18 | KAL908 | LHR → ICN | May 18, 06:35 UTC | May 18, 07:00 UTC | 25m |
| 2026-05-17 | KAL908 | LHR → ICN | May 17, 19:05 UTC | May 18, 05:50 UTC | 10h 45m |
| 2026-05-17 | KAL907 | ICN → LHR | May 17, 10:50 UTC | May 17, 15:50 UTC | 5h 0m |
| 2026-05-17 | KAL907 | ICN → LHR | May 17, 02:20 UTC | May 17, 02:35 UTC | 15m |
| 2026-05-16 | KAL086 | JFK → ICN | May 16, 05:00 UTC | May 16, 19:25 UTC | 14h 26m |
| 2026-05-15 | KAL085 | ICN → JFK | May 15, 10:45 UTC | May 16, 00:45 UTC | 13h 59m |
| 2026-05-14 | KAL094 | IAD → ICN | May 14, 17:55 UTC | May 15, 07:45 UTC | 13h 50m |
| 2026-05-14 | KAL093 | ICN → IAD | May 14, 01:55 UTC | May 14, 15:20 UTC | 13h 25m |
| 2026-05-13 | KAL086 | JFK → ICN | May 13, 05:20 UTC | May 13, 19:50 UTC | 14h 30m |
| 2026-05-12 | KAL085 | ICN → JFK | May 12, 11:10 UTC | May 13, 00:55 UTC | 13h 45m |
| 2026-05-11 | KAL908 | LHR → ICN | May 11, 19:05 UTC | May 11, 22:00 UTC | 2h 55m |
| 2026-05-11 | KAL907 | ICN → LHR | May 11, 07:25 UTC | May 11, 16:05 UTC | 8h 40m |
| 2026-05-11 | KAL907 | ICN → LHR | May 11, 02:20 UTC | May 11, 02:30 UTC | 10m |
| 2026-05-09 | KAL034 | ATL → ICN | May 9, 15:55 UTC | May 10, 06:55 UTC | 15h 0m |
| 2026-05-09 | KAL033 | ICN → ATL | May 9, 00:15 UTC | May 9, 13:05 UTC | 12h 50m |
| 2026-05-07 | KAL094 | IAD → ICN | May 7, 17:40 UTC | May 8, 08:55 UTC | 15h 15m |
| 2026-05-07 | KAL093 | ICN → IAD | May 7, 01:55 UTC | May 7, 14:55 UTC | 13h 0m |
| 2026-05-06 | KAL006 | - | May 6, 07:10 UTC | May 6, 19:20 UTC | 12h 9m |
| 2026-05-05 | KAL005 | - | May 5, 12:35 UTC | May 5, 23:30 UTC | 10h 55m |
| 2026-05-04 | KAL938 | VIE → ICN | May 4, 16:35 UTC | May 5, 02:05 UTC | 9h 31m |
| 2026-05-04 | KAL937 | ICN → VIE | May 4, 03:09 UTC | May 4, 13:40 UTC | 10h 30m |
| 2026-05-03 | KAL086 | JFK → ICN | May 3, 05:00 UTC | May 3, 19:55 UTC | 14h 55m |
| 2026-05-02 | KAL085 | ICN → JFK | May 2, 12:35 UTC | May 3, 00:35 UTC | 12h 0m |
| 2026-05-02 | KAL085 | ICN → JFK | May 2, 11:30 UTC | May 2, 11:50 UTC | 20m |
| 2026-05-01 | KAL908 | LHR → ICN | May 1, 19:00 UTC | May 2, 06:00 UTC | 11h 0m |
| 2026-05-01 | KAL907 | ICN → LHR | May 1, 04:00 UTC | May 1, 16:20 UTC | 12h 20m |
| 2026-04-30 | KAL006 | - | Apr 30, 07:05 UTC | Apr 30, 19:25 UTC | 12h 20m |
| 2026-04-29 | KAL005 | - | Apr 29, 12:30 UTC | Apr 29, 22:30 UTC | 10h 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 HL7203 page for operator, model, and routing details .