Apparatus

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sensors Mode-S transponder

71C390

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL8390 · BOEING 787-9 Dreamliner

Hex
71C390
Octal
34341620
Decimal
7,455,632
Country
KR
Tail
HL8390
Type
B789
No current signal · last broadcast 6h ago
Flights observed
176
Distinct callsigns
20
Country
KR
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 71C390.

Country allocation

The ICAO 24-bit address 71C390 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
KAL480 Korean Air 13 2026-06-03
KAL032 - 13 2026-07-08
KAL031 - 13 2026-07-08
KAL955 - 12 2026-07-11
KAL956 - 11 2026-07-12
KAL914 - 7 2026-06-17
KAL411 - 7 2026-07-01
KAL913 - 6 2026-06-16
KAL498 Korean Air 6 2026-05-22
KAL412 - 6 2026-07-01
KAL076 - 6 2026-06-30
KAL075 - 6 2026-06-29
KAL479 Korean Air 5 2026-05-03
KAL964 - 4 2026-07-14
KAL922 - 4 2026-07-04
KAL647 Korean Air 4 2026-05-23
KAL468 - 4 2026-07-09
KAL431 - 4 2026-07-14
KAL963 - 3 2026-07-13
KAL921 - 3 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL431 - Jul 14, 07:35 UTCJul 14, 11:55 UTC4h 20m
2026-07-14 KAL964 - Jul 14, 04:20 UTCJul 14, 04:45 UTC25m
2026-07-13 KAL964 - Jul 13, 18:40 UTCJul 14, 03:30 UTC8h 50m
2026-07-13 KAL963 - Jul 13, 05:20 UTCJul 13, 15:55 UTC10h 35m
2026-07-13 KAL963 - Jul 13, 04:15 UTCJul 13, 04:30 UTC15m
2026-07-12 KAL678 ICN → ICN Jul 12, 09:15 UTCJul 12, 22:35 UTC13h 20m
2026-07-12 KAL956 - Jul 12, 03:10 UTCJul 12, 03:30 UTC20m
2026-07-11 KAL956 - Jul 11, 18:35 UTCJul 12, 02:15 UTC7h 40m
2026-07-11 KAL955 - Jul 11, 15:20 UTCJul 11, 15:45 UTC25m
2026-07-11 KAL955 - Jul 11, 06:10 UTCJul 11, 14:40 UTC8h 30m
2026-07-11 KAL955 - Jul 11, 05:01 UTCJul 11, 05:15 UTC15m
2026-07-11 KAL788 - Jul 11, 01:50 UTCJul 11, 02:55 UTC1h 5m
2026-07-10 KAL787 - Jul 10, 23:25 UTCJul 11, 00:05 UTC40m
2026-07-10 KAL471 - Jul 10, 00:25 UTCJul 10, 12:25 UTC12h 0m
2026-07-09 KAL468 ICN → ICN Jul 9, 11:25 UTCJul 9, 22:00 UTC10h 35m
2026-07-08 KAL032 DFW → ICN Jul 8, 17:40 UTCJul 9, 08:15 UTC14h 35m
2026-07-08 KAL031 ICN → DFW Jul 8, 01:00 UTCJul 8, 13:10 UTC12h 10m
2026-07-07 KAL492 - Jul 7, 15:30 UTCJul 7, 20:45 UTC5h 15m
2026-07-07 KAL491 ICN → RGN Jul 7, 07:15 UTCJul 7, 12:15 UTC5h 0m
2026-07-07 KAL956 - Jul 7, 03:30 UTCJul 7, 03:55 UTC25m
2026-07-06 KAL956 - Jul 6, 18:45 UTCJul 7, 02:40 UTC7h 55m
2026-07-06 KAL955 - Jul 6, 16:15 UTCJul 6, 16:35 UTC20m
2026-07-06 KAL955 - Jul 6, 06:00 UTCJul 6, 15:35 UTC9h 35m
2026-07-06 KAL788 - Jul 6, 01:55 UTCJul 6, 03:00 UTC1h 5m
2026-07-05 KAL787 ICN → FUK Jul 5, 23:25 UTCJul 6, 00:20 UTC55m
2026-07-05 KAL8054 - Jul 5, 07:40 UTCJul 5, 10:05 UTC2h 25m
2026-07-05 KAL8054 - Jul 5, 00:35 UTCJul 5, 00:50 UTC15m
2026-07-04 KAL8053 - Jul 4, 21:40 UTCJul 4, 22:00 UTC20m
2026-07-04 KAL8053 - Jul 4, 13:55 UTCJul 4, 15:45 UTC1h 50m
2026-07-04 KAL922 - Jul 4, 10:00 UTCJul 4, 10:20 UTC20m
2026-07-03 KAL922 - Jul 3, 21:50 UTCJul 4, 09:10 UTC11h 20m
2026-07-03 KAL921 ICN → LIS Jul 3, 04:40 UTCJul 3, 19:10 UTC14h 30m
2026-07-01 KAL412 - Jul 1, 23:20 UTCJul 2, 10:20 UTC11h 0m
2026-07-01 KAL411 ICN → AKL Jul 1, 09:20 UTCJul 1, 20:20 UTC11h 0m
2026-07-01 KAL166 - Jul 1, 06:15 UTCJul 1, 06:40 UTC25m
2026-07-01 KAL165 - Jul 1, 00:00 UTCJul 1, 00:20 UTC20m
2026-06-30 KAL076 YVR → ICN Jun 30, 08:10 UTCJun 30, 18:35 UTC10h 25m
2026-06-29 KAL075 ICN → YVR Jun 29, 13:59 UTCJun 29, 23:09 UTC9h 10m
2026-06-29 KAL888 ICN → ICN Jun 29, 02:35 UTCJun 29, 07:40 UTC5h 5m
2026-06-28 KAL076 YVR → ICN Jun 28, 08:14 UTCJun 28, 18:44 UTC10h 30m
2026-06-27 KAL075 ICN → YVR Jun 27, 14:00 UTCJun 27, 23:00 UTC9h 0m
2026-06-26 KAL032 DFW → ICN Jun 26, 17:40 UTCJun 27, 07:34 UTC13h 55m
2026-06-26 KAL031 ICN → DFW Jun 26, 00:55 UTCJun 26, 12:59 UTC12h 5m
2026-06-21 KAL964 - Jun 21, 04:04 UTCJun 21, 04:30 UTC25m
2026-06-20 KAL964 - Jun 20, 18:45 UTCJun 21, 03:19 UTC8h 35m
2026-06-20 KAL963 - Jun 20, 04:29 UTCJun 20, 16:39 UTC12h 10m
2026-06-19 KAL076 - Jun 19, 08:20 UTCJun 19, 18:49 UTC10h 30m
2026-06-18 KAL075 ICN → YVR Jun 18, 13:55 UTCJun 18, 23:40 UTC9h 45m
2026-06-17 KAL914 - Jun 17, 06:50 UTCJun 17, 07:25 UTC35m
2026-06-16 KAL914 - Jun 16, 19:00 UTCJun 16, 23:45 UTC4h 46m

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 HL8390 page for operator, model, and routing details .

Mode-S 71C390 frequently asked

What is Mode-S code 71C390?
71C390 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8390.
Where is Mode-S 71C390 registered?
Mode-S code 71C390 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 71C390 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C390, octal 34341620, decimal 7,455,632.
What flights does 71C390 operate?
Mode-S 71C390 has broadcast 20 distinct callsigns, including KAL480, KAL032, KAL031, KAL955, KAL956.