Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast 13h ago
Flights observed
189
Distinct callsigns
20
Country
KR
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 71BA03.

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
KAL902 - 18 2026-07-14
KAL901 - 16 2026-07-13
KAL086 Korean Air 16 2026-07-01
KAL085 Korean Air 16 2026-06-30
KAL907 - 11 2026-07-09
KAL034 Korean Air 11 2026-07-07
KAL006 - 11 2026-06-11
KAL908 - 10 2026-07-10
KAL005 - 10 2026-06-10
KAL646 - 9 2026-07-12
KAL645 - 9 2026-07-12
KAL033 - 7 2026-07-07
KAL094 Korean Air 6 2026-06-09
KAL093 Korean Air 5 2026-06-09
KAL035 Korean Air 5 2026-05-22
KAL622 - 4 2026-06-22
KAL036 Korean Air 4 2026-05-22
KAL621 - 3 2026-06-21
KAL788 - 2 2026-06-20
KAL787 Korean Air 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL902 - Jul 14, 06:05 UTCJul 14, 06:35 UTC30m
2026-07-13 KAL902 - Jul 13, 19:05 UTCJul 14, 05:05 UTC10h 0m
2026-07-13 KAL901 - Jul 13, 03:50 UTCJul 13, 15:55 UTC12h 5m
2026-07-13 KAL901 - Jul 13, 02:40 UTCJul 13, 02:55 UTC15m
2026-07-12 KAL646 - Jul 12, 17:55 UTCJul 12, 23:50 UTC5h 55m
2026-07-12 KAL645 - Jul 12, 10:10 UTCJul 12, 15:40 UTC5h 30m
2026-07-12 KAL902 - Jul 12, 05:55 UTCJul 12, 06:15 UTC20m
2026-07-11 KAL902 - Jul 11, 19:00 UTCJul 12, 05:01 UTC10h 0m
2026-07-11 KAL901 - Jul 11, 04:01 UTCJul 11, 16:00 UTC12h 0m
2026-07-11 KAL901 - Jul 11, 02:50 UTCJul 11, 03:05 UTC15m
2026-07-10 KAL646 - Jul 10, 23:50 UTCJul 11, 00:10 UTC20m
2026-07-10 KAL646 - Jul 10, 18:05 UTCJul 10, 20:40 UTC2h 35m
2026-07-10 KAL645 - Jul 10, 10:25 UTCJul 10, 16:00 UTC5h 35m
2026-07-10 KAL908 - Jul 10, 05:55 UTCJul 10, 06:20 UTC25m
2026-07-09 KAL908 - Jul 9, 18:55 UTCJul 10, 05:00 UTC10h 5m
2026-07-09 KAL907 - Jul 9, 04:05 UTCJul 9, 16:25 UTC12h 20m
2026-07-09 KAL907 - Jul 9, 02:40 UTCJul 9, 02:55 UTC15m
2026-07-08 KAL646 SIN → ICN Jul 8, 23:05 UTCJul 8, 23:50 UTC45m
2026-07-08 KAL646 SIN → ICN Jul 8, 21:05 UTCJul 8, 22:00 UTC55m
2026-07-08 KAL645 - Jul 8, 15:15 UTCJul 8, 15:30 UTC15m
2026-07-08 KAL645 - Jul 8, 10:10 UTCJul 8, 12:25 UTC2h 15m
2026-07-07 KAL034 ATL → ICN Jul 7, 16:05 UTCJul 8, 06:45 UTC14h 40m
2026-07-07 KAL033 - Jul 7, 00:05 UTCJul 7, 13:35 UTC13h 30m
2026-07-06 KAL908 - Jul 6, 06:30 UTCJul 6, 06:50 UTC20m
2026-07-05 KAL908 - Jul 5, 19:10 UTCJul 6, 05:40 UTC10h 30m
2026-07-05 KAL907 - Jul 5, 03:35 UTCJul 5, 15:45 UTC12h 10m
2026-07-05 KAL907 - Jul 5, 02:25 UTCJul 5, 02:40 UTC15m
2026-07-04 KAL646 SIN → ICN Jul 4, 21:05 UTCJul 4, 23:50 UTC2h 45m
2026-07-04 KAL645 - Jul 4, 15:40 UTCJul 4, 15:50 UTC10m
2026-07-04 KAL645 - Jul 4, 10:30 UTCJul 4, 13:05 UTC2h 35m
2026-07-03 KAL624 - Jul 3, 16:00 UTCJul 3, 19:25 UTC3h 25m
2026-07-03 KAL623 - Jul 3, 10:25 UTCJul 3, 13:40 UTC3h 15m
2026-07-02 KAL034 ATL → ICN Jul 2, 15:55 UTCJul 3, 06:15 UTC14h 20m
2026-07-02 KAL033 ICN → ATL Jul 2, 00:10 UTCJul 2, 13:20 UTC13h 10m
2026-07-01 KAL086 JFK → ICN Jul 1, 19:05 UTCJul 1, 19:50 UTC45m
2026-07-01 KAL086 JFK → ICN Jul 1, 05:15 UTCJul 1, 18:10 UTC12h 55m
2026-06-30 KAL085 ICN → JFK Jun 30, 11:20 UTCJul 1, 00:50 UTC13h 30m
2026-06-29 KAL902 CDG → ICN Jun 29, 19:09 UTCJun 30, 06:40 UTC11h 31m
2026-06-29 KAL901 - Jun 29, 03:54 UTCJun 29, 15:45 UTC11h 50m
2026-06-29 KAL901 - Jun 29, 02:45 UTCJun 29, 02:59 UTC15m
2026-06-27 KAL882 - Jun 27, 23:55 UTCJun 28, 05:20 UTC5h 25m
2026-06-27 KAL086 JFK → ICN Jun 27, 04:59 UTCJun 27, 19:45 UTC14h 45m
2026-06-26 KAL085 ICN → JFK Jun 26, 11:24 UTCJun 27, 00:50 UTC13h 25m
2026-06-26 KAL902 CDG → ICN Jun 26, 06:45 UTCJun 26, 07:05 UTC20m
2026-06-25 KAL902 CDG → ICN Jun 25, 19:20 UTCJun 26, 05:55 UTC10h 35m
2026-06-25 KAL901 - Jun 25, 03:15 UTCJun 25, 16:39 UTC13h 25m
2026-06-24 KAL646 SIN → ICN Jun 24, 21:14 UTCJun 25, 00:05 UTC2h 50m
2026-06-24 KAL645 - Jun 24, 10:30 UTCJun 24, 15:59 UTC5h 30m
2026-06-23 KAL034 ATL → ICN Jun 23, 15:55 UTCJun 24, 06:35 UTC14h 40m
2026-06-23 KAL033 ICN → ATL Jun 23, 00:04 UTCJun 23, 12:49 UTC12h 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 HL7203 page for operator, model, and routing details .

Mode-S 71BA03 frequently asked

What is Mode-S code 71BA03?
71BA03 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7203.
Where is Mode-S 71BA03 registered?
Mode-S code 71BA03 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71BA03 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BA03, octal 34335003, decimal 7,453,187.
What flights does 71BA03 operate?
Mode-S 71BA03 has broadcast 20 distinct callsigns, including KAL902, KAL901, KAL086, KAL085, KAL907.