Apparatus

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sensors Mode-S transponder

71C383

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

Currently assigned to HL8383 · AIRBUS A-350-900

Hex
71C383
Octal
34341603
Decimal
7,455,619
Country
KR
Tail
HL8383
Type
A359
No current signal · last broadcast Jul 25, 21:45 UTC
Flights observed
238
Distinct callsigns
20
Country
KR
Last broadcast
Jul 25, 21:45 UTC

Last known position

Most recent position reported by Mode-S 71C383.

Country allocation

The ICAO 24-bit address 71C383 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
AAR522 Asiana Airlines 20 2026-07-25
AAR752 Asiana Airlines 16 2026-07-25
AAR521 Asiana Airlines 16 2026-07-23
AAR751 Asiana Airlines 15 2026-07-25
AAR512 - 12 2026-07-18
AAR511 - 11 2026-07-17
AAR761 - 10 2026-07-13
AAR501 - 10 2026-06-26
AAR582 - 9 2026-07-15
AAR581 - 9 2026-07-14
AAR502 - 9 2026-06-27
AAR545 Asiana Airlines 8 2026-06-04
AAR211 - 8 2026-07-20
AAR546 Asiana Airlines 6 2026-06-05
AAR212 Asiana Airlines 6 2026-07-19
AAR762 - 5 2026-07-13
AAR733 - 5 2026-06-25
AAR713 Asiana Airlines 5 2026-05-19
AAR742 - 4 2026-07-04
AAR711 - 4 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AAR752 SIN → ICN Jul 25, 16:35 UTCJul 25, 21:45 UTC5h 10m
2026-07-25 AAR751 ICN → SIN Jul 25, 13:10 UTCJul 25, 13:30 UTC20m
2026-07-25 AAR751 ICN → SIN Jul 25, 07:55 UTCJul 25, 10:35 UTC2h 40m
2026-07-25 AAR522 LHR → ICN Jul 25, 03:15 UTCJul 25, 03:40 UTC25m
2026-07-24 AAR522 LHR → ICN Jul 24, 16:00 UTCJul 25, 02:25 UTC10h 25m
2026-07-23 AAR521 ICN → LHR Jul 23, 23:35 UTCJul 24, 13:00 UTC13h 25m
2026-07-23 AAR203 LAX → ICN Jul 23, 06:25 UTCJul 23, 17:55 UTC11h 30m
2026-07-22 AAR204 ICN → LAX Jul 22, 13:00 UTCJul 23, 00:05 UTC11h 5m
2026-07-22 AAR522 LHR → ICN Jul 22, 03:20 UTCJul 22, 03:40 UTC20m
2026-07-21 AAR522 LHR → ICN Jul 21, 16:25 UTCJul 22, 02:20 UTC9h 55m
2026-07-21 AAR521 - Jul 21, 00:30 UTCJul 21, 13:15 UTC12h 45m
2026-07-20 AAR521 - Jul 20, 23:15 UTCJul 20, 23:40 UTC25m
2026-07-20 AAR211 SFO → ICN Jul 20, 07:20 UTCJul 20, 18:40 UTC11h 20m
2026-07-19 AAR212 ICN → SFO Jul 19, 12:25 UTCJul 19, 23:00 UTC10h 35m
2026-07-19 AAR362 - Jul 19, 00:30 UTCJul 19, 05:50 UTC5h 20m
2026-07-18 AAR512 - Jul 18, 06:25 UTCJul 18, 06:55 UTC30m
2026-07-17 AAR512 - Jul 17, 19:45 UTCJul 18, 05:40 UTC9h 56m
2026-07-17 AAR511 - Jul 17, 04:49 UTCJul 17, 17:05 UTC12h 15m
2026-07-17 AAR511 - Jul 17, 03:34 UTCJul 17, 03:59 UTC25m
2026-07-16 AAR203 - Jul 16, 06:45 UTCJul 16, 18:44 UTC12h 0m
2026-07-15 AAR204 ICN → LAX Jul 15, 13:05 UTCJul 16, 00:30 UTC11h 25m
2026-07-15 AAR582 - Jul 15, 06:25 UTCJul 15, 06:50 UTC25m
2026-07-14 AAR582 - Jul 14, 20:25 UTCJul 15, 05:45 UTC9h 19m
2026-07-14 AAR581 - Jul 14, 06:25 UTCJul 14, 18:10 UTC11h 45m
2026-07-14 AAR581 - Jul 14, 05:10 UTCJul 14, 05:30 UTC20m
2026-07-13 AAR762 - Jul 13, 16:45 UTCJul 13, 21:50 UTC5h 5m
2026-07-13 AAR761 - Jul 13, 12:20 UTCJul 13, 12:40 UTC20m
2026-07-13 AAR761 - Jul 13, 06:30 UTCJul 13, 11:05 UTC4h 35m
2026-07-13 AAR522 - Jul 13, 03:20 UTCJul 13, 03:50 UTC30m
2026-07-12 AAR522 - Jul 12, 16:20 UTCJul 13, 02:35 UTC10h 15m
2026-07-12 AAR521 - Jul 12, 00:40 UTCJul 12, 13:20 UTC12h 40m
2026-07-11 AAR521 - Jul 11, 23:30 UTCJul 11, 23:50 UTC20m
2026-07-11 AAR522 - Jul 11, 03:01 UTCJul 11, 03:25 UTC25m
2026-07-10 AAR522 - Jul 10, 16:00 UTCJul 11, 02:10 UTC10h 10m
2026-07-10 AAR521 - Jul 10, 00:55 UTCJul 10, 13:25 UTC12h 30m
2026-07-09 AAR521 - Jul 9, 23:45 UTCJul 10, 00:00 UTC15m
2026-07-09 AAR203 - Jul 9, 06:55 UTCJul 9, 19:00 UTC12h 5m
2026-07-08 AAR204 ICN → LAX Jul 8, 13:30 UTCJul 9, 00:25 UTC10h 55m
2026-07-08 AAR582 - Jul 8, 06:40 UTCJul 8, 07:00 UTC20m
2026-07-07 AAR582 - Jul 7, 20:25 UTCJul 8, 05:45 UTC9h 20m
2026-07-07 AAR581 - Jul 7, 13:50 UTCJul 7, 18:20 UTC4h 30m
2026-07-07 AAR581 - Jul 7, 05:20 UTCJul 7, 05:40 UTC20m
2026-07-06 AAR211 SFO → ICN Jul 6, 06:55 UTCJul 6, 18:30 UTC11h 35m
2026-07-05 AAR212 - Jul 5, 12:30 UTCJul 5, 22:30 UTC10h 0m
2026-07-04 AAR742 - Jul 4, 18:55 UTCJul 4, 23:55 UTC5h 0m
2026-07-04 AAR741 ICN → BKK Jul 4, 11:10 UTCJul 4, 16:00 UTC4h 50m
2026-07-04 AAR512 BCN → ICN Jul 4, 06:30 UTCJul 4, 06:50 UTC20m
2026-07-03 AAR512 BCN → ICN Jul 3, 19:20 UTCJul 4, 05:40 UTC10h 20m
2026-07-03 AAR511 - Jul 3, 04:30 UTCJul 3, 16:20 UTC11h 50m
2026-07-03 AAR511 - Jul 3, 03:15 UTCJul 3, 03:35 UTC20m

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 HL8383 page for operator, model, and routing details .

Mode-S 71C383 frequently asked

What is Mode-S code 71C383?
71C383 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8383.
Where is Mode-S 71C383 registered?
Mode-S code 71C383 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 71C383 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C383, octal 34341603, decimal 7,455,619.
What flights does 71C383 operate?
Mode-S 71C383 has broadcast 20 distinct callsigns, including AAR522, AAR752, AAR521, AAR751, AAR512.