Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast Jul 26, 06:10 UTC
Flights observed
192
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 06:10 UTC

Last known position

Most recent position reported by Mode-S 71BA04.

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 24 2026-07-24
KAL907 Korean Air 20 2026-07-23
KAL645 Korean Air 15 2026-07-24
KAL902 Korean Air 13 2026-07-25
KAL901 Korean Air 13 2026-07-25
KAL646 Korean Air 12 2026-07-24
KAL036 - 12 2026-07-08
KAL035 - 12 2026-07-08
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

DateFlightRouteTakeoffLandingDuration
2026-07-25 KAL902 CDG → ICN Jul 25, 18:50 UTCJul 26, 06:05 UTC11h 15m
2026-07-25 KAL901 ICN → CDG Jul 25, 04:15 UTCJul 25, 15:50 UTC11h 35m
2026-07-25 KAL901 ICN → CDG Jul 25, 03:10 UTCJul 25, 03:30 UTC20m
2026-07-24 KAL646 SIN → ICN Jul 24, 20:15 UTCJul 25, 00:40 UTC4h 25m
2026-07-24 KAL645 PUS → CBO Jul 24, 10:15 UTCJul 24, 14:45 UTC4h 30m
2026-07-24 KAL908 LHR → ICN Jul 24, 06:00 UTCJul 24, 06:25 UTC25m
2026-07-23 KAL908 LHR → ICN Jul 23, 18:50 UTCJul 24, 05:15 UTC10h 25m
2026-07-23 KAL907 ICN → LHR Jul 23, 03:40 UTCJul 23, 15:55 UTC12h 15m
2026-07-23 KAL907 ICN → LHR Jul 23, 02:30 UTCJul 23, 02:50 UTC20m
2026-07-22 KAL658 - Jul 22, 16:05 UTCJul 22, 20:45 UTC4h 40m
2026-07-22 KAL657 ICN → BKK Jul 22, 01:10 UTCJul 22, 03:45 UTC2h 35m
2026-07-14 KAL094 IAD → ICN Jul 14, 18:00 UTCJul 15, 08:20 UTC14h 19m
2026-07-14 KAL093 ICN → IAD Jul 14, 01:45 UTCJul 14, 14:55 UTC13h 10m
2026-07-13 KAL766 - Jul 13, 06:10 UTCJul 13, 08:30 UTC2h 20m
2026-07-13 KAL765 - Jul 13, 02:05 UTCJul 13, 04:25 UTC2h 20m
2026-07-12 KAL602 ICN → ICN Jul 12, 11:25 UTCJul 12, 21:05 UTC9h 40m
2026-07-11 KAL094 IAD → ICN Jul 11, 17:50 UTCJul 12, 07:55 UTC14h 5m
2026-07-11 KAL093 - Jul 11, 01:50 UTCJul 11, 15:20 UTC13h 30m
2026-07-10 KAL006 LAS → ICN Jul 10, 07:10 UTCJul 10, 19:05 UTC11h 55m
2026-07-09 KAL005 ICN → LAS Jul 9, 12:20 UTCJul 9, 23:15 UTC10h 55m
2026-07-08 KAL036 ATL → ICN Jul 8, 17:55 UTCJul 9, 08:10 UTC14h 15m
2026-07-08 KAL035 - Jul 8, 02:05 UTCJul 8, 15:15 UTC13h 10m
2026-07-06 KAL034 ATL → ICN Jul 6, 16:15 UTCJul 7, 06:25 UTC14h 10m
2026-07-06 KAL033 ICN → ATL Jul 6, 00:40 UTCJul 6, 13:45 UTC13h 5m
2026-07-05 KAL006 LAS → ICN Jul 5, 06:55 UTCJul 5, 19:10 UTC12h 15m
2026-07-04 KAL005 ICN → LAS Jul 4, 12:15 UTCJul 4, 23:05 UTC10h 50m
2026-07-03 KAL094 IAD → ICN Jul 3, 17:50 UTCJul 4, 07:55 UTC14h 5m
2026-07-03 KAL093 ICN → IAD Jul 3, 01:55 UTCJul 3, 15:10 UTC13h 15m
2026-07-02 KAL908 - Jul 2, 07:10 UTCJul 2, 07:40 UTC30m
2026-07-01 KAL908 - Jul 1, 19:50 UTCJul 2, 00:15 UTC4h 25m
2026-07-01 KAL907 - Jul 1, 03:40 UTCJul 1, 15:45 UTC12h 5m
2026-07-01 KAL907 - Jul 1, 02:30 UTCJul 1, 02:45 UTC15m
2026-06-30 KAL908 - Jun 30, 06:30 UTCJun 30, 07:00 UTC30m
2026-06-29 KAL908 - Jun 29, 19:05 UTCJun 30, 05:40 UTC10h 36m
2026-06-29 KAL907 - Jun 29, 03:34 UTCJun 29, 15:45 UTC12h 10m
2026-06-29 KAL907 - Jun 29, 02:25 UTCJun 29, 02:39 UTC15m
2026-06-27 KAL908 - Jun 27, 19:09 UTCJun 28, 06:49 UTC11h 40m
2026-06-27 KAL907 - Jun 27, 02:39 UTCJun 27, 16:20 UTC13h 40m
2026-06-26 KAL646 SIN → ICN Jun 26, 21:10 UTCJun 27, 00:00 UTC2h 50m
2026-06-26 KAL645 - Jun 26, 15:20 UTCJun 26, 15:34 UTC15m
2026-06-26 KAL645 - Jun 26, 10:10 UTCJun 26, 12:44 UTC2h 35m
2026-06-25 KAL034 ATL → ICN Jun 25, 15:59 UTCJun 26, 06:29 UTC14h 30m
2026-06-25 KAL033 ICN → ATL Jun 25, 00:40 UTCJun 25, 13:14 UTC12h 35m
2026-06-24 KAL2002 HKG → ICN Jun 24, 04:34 UTCJun 24, 07:34 UTC3h 0m
2026-06-24 KAL2001 ICN → HKG Jun 24, 02:09 UTCJun 24, 02:24 UTC15m
2026-06-23 KAL2001 ICN → HKG Jun 23, 23:24 UTCJun 24, 01:34 UTC2h 10m
2026-06-23 KAL902 CDG → ICN Jun 23, 05:54 UTCJun 23, 06:24 UTC30m
2026-06-22 KAL902 CDG → ICN Jun 22, 19:00 UTCJun 23, 05:04 UTC10h 5m
2026-06-22 KAL901 - Jun 22, 04:04 UTCJun 22, 16:14 UTC12h 10m
2026-06-22 KAL901 - Jun 22, 02:50 UTCJun 22, 02:59 UTC10m

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 .

Mode-S 71BA04 frequently asked

What is Mode-S code 71BA04?
71BA04 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7204.
Where is Mode-S 71BA04 registered?
Mode-S code 71BA04 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 71BA04 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 06:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BA04, octal 34335004, decimal 7,453,188.
What flights does 71BA04 operate?
Mode-S 71BA04 has broadcast 20 distinct callsigns, including KAL908, KAL907, KAL645, KAL902, KAL901.