Apparatus

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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
Broadcasting now · callsign KAL621 · 34,000 ft
Flights observed
209
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 11:40 UTC

Current position

71BA03 is currently broadcasting. Map zoomed to live 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
KAL902 Korean Air 20 2026-07-18
KAL901 - 18 2026-07-17
KAL086 Korean Air 16 2026-07-01
KAL085 Korean Air 16 2026-06-30
KAL907 Korean Air 13 2026-07-22
KAL034 - 13 2026-07-20
KAL908 Korean Air 12 2026-07-23
KAL006 - 12 2026-07-19
KAL645 - 11 2026-07-16
KAL005 - 11 2026-07-18
KAL646 - 10 2026-07-16
KAL033 - 9 2026-07-20
KAL094 Korean Air 6 2026-06-09
KAL035 Korean Air 6 2026-07-24
KAL093 Korean Air 5 2026-06-09
KAL036 Korean Air 5 2026-07-24
KAL622 - 4 2026-06-22
KAL621 - 3 2026-06-21
KAL788 - 2 2026-06-20
KAL787 Korean Air 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL416 GUM → ICN Jul 26, 02:00 UTCJul 26, 11:40 UTC9h 41m
2026-07-24 KAL036 ATL → ICN Jul 24, 17:55 UTCJul 25, 08:40 UTC14h 45m
2026-07-24 KAL035 ICN → ATL Jul 24, 02:10 UTCJul 24, 15:00 UTC12h 50m
2026-07-23 KAL908 LHR → ICN Jul 23, 06:00 UTCJul 23, 06:25 UTC25m
2026-07-22 KAL908 LHR → ICN Jul 22, 19:00 UTCJul 23, 05:15 UTC10h 15m
2026-07-22 KAL907 ICN → LHR Jul 22, 03:35 UTCJul 22, 15:55 UTC12h 20m
2026-07-22 KAL907 ICN → LHR Jul 22, 02:10 UTCJul 22, 02:30 UTC20m
2026-07-20 KAL034 ATL → ICN Jul 20, 15:55 UTCJul 21, 07:00 UTC15h 4m
2026-07-20 KAL033 ICN → ATL Jul 20, 00:15 UTCJul 20, 13:35 UTC13h 20m
2026-07-19 KAL006 LAS → ICN Jul 19, 06:55 UTCJul 19, 18:45 UTC11h 50m
2026-07-18 KAL005 ICN → LAS Jul 18, 12:20 UTCJul 18, 23:30 UTC11h 10m
2026-07-18 KAL902 CDG → ICN Jul 18, 07:10 UTCJul 18, 07:30 UTC20m
2026-07-17 KAL902 CDG → ICN Jul 17, 20:25 UTCJul 18, 06:20 UTC9h 56m
2026-07-17 KAL901 - Jul 17, 11:30 UTCJul 17, 16:34 UTC5h 5m
2026-07-17 KAL901 - Jul 17, 03:10 UTCJul 17, 03:25 UTC15m
2026-07-16 KAL646 - Jul 16, 21:05 UTCJul 16, 23:59 UTC2h 55m
2026-07-16 KAL645 - Jul 16, 15:45 UTCJul 16, 15:55 UTC10m
2026-07-16 KAL645 - Jul 16, 10:35 UTCJul 16, 13:10 UTC2h 35m
2026-07-15 KAL034 ATL → ICN Jul 15, 16:05 UTCJul 16, 06:10 UTC14h 5m
2026-07-15 KAL033 ICN → ATL Jul 15, 00:15 UTCJul 15, 13:35 UTC13h 20m
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

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?
Yes. Mode-S 71BA03 is currently airborne.
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.