Apparatus

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sensors Mode-S transponder

71C308

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

Currently assigned to HL8308 · AIRBUS A-350-900

Hex
71C308
Octal
34341410
Decimal
7,455,496
Country
KR
Tail
HL8308
Type
A359
Broadcasting now · callsign AAR221 · 38,000 ft
Flights observed
231
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:20 UTC

Current position

71C308 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C308 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 18 2026-07-26
AAR761 - 17 2026-07-15
AAR762 - 13 2026-07-15
AAR521 Asiana Airlines 13 2026-07-25
AAR548 - 11 2026-07-20
AAR547 - 10 2026-07-19
AAR502 - 10 2026-07-18
AAR501 - 10 2026-07-17
AAR752 Asiana Airlines 9 2026-07-22
AAR582 - 8 2026-07-01
AAR581 - 8 2026-06-30
AAR512 Asiana Airlines 7 2026-04-29
AAR511 Asiana Airlines 7 2026-04-28
AAR221 - 7 2026-07-05
AAR212 - 7 2026-07-01
AAR211 - 7 2026-07-02
AAR751 Asiana Airlines 6 2026-07-22
AAR222 - 6 2026-07-04
AAR734 Asiana Airlines 5 2026-07-16
AAR733 - 5 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAR522 LHR → ICN Jul 26, 16:05 UTCJul 26, 20:20 UTC4h 15m
2026-07-25 AAR521 ICN → LHR Jul 25, 23:15 UTCJul 26, 12:40 UTC13h 26m
2026-07-25 AAR203 LAX → ICN Jul 25, 06:15 UTCJul 25, 18:05 UTC11h 50m
2026-07-24 AAR204 ICN → LAX Jul 24, 13:10 UTCJul 25, 00:25 UTC11h 15m
2026-07-24 AAR562 FCO → ICN Jul 24, 05:55 UTCJul 24, 06:10 UTC15m
2026-07-23 AAR562 FCO → ICN Jul 23, 19:55 UTCJul 24, 05:00 UTC9h 5m
2026-07-23 AAR561 ICN → FCO Jul 23, 06:25 UTCJul 23, 17:25 UTC11h 0m
2026-07-23 AAR561 ICN → FCO Jul 23, 05:10 UTCJul 23, 05:35 UTC25m
2026-07-22 AAR752 SIN → ICN Jul 22, 22:05 UTCJul 23, 01:05 UTC3h 0m
2026-07-22 AAR752 SIN → ICN Jul 22, 19:10 UTCJul 22, 19:20 UTC10m
2026-07-22 AAR751 ICN → SIN Jul 22, 14:05 UTCJul 22, 14:15 UTC10m
2026-07-21 AAR562 FCO → ICN Jul 21, 20:10 UTCJul 22, 11:20 UTC15h 10m
2026-07-21 AAR561 ICN → FCO Jul 21, 05:10 UTCJul 21, 17:55 UTC12h 45m
2026-07-20 AAR548 - Jul 20, 03:30 UTCJul 20, 04:00 UTC30m
2026-07-19 AAR548 - Jul 19, 18:10 UTCJul 20, 02:50 UTC8h 40m
2026-07-19 AAR547 - Jul 19, 05:15 UTCJul 19, 15:55 UTC10h 40m
2026-07-19 AAR547 - Jul 19, 04:05 UTCJul 19, 04:25 UTC20m
2026-07-18 AAR752 SIN → ICN Jul 18, 18:30 UTCJul 18, 21:35 UTC3h 5m
2026-07-18 AAR752 SIN → ICN Jul 18, 15:30 UTCJul 18, 15:40 UTC10m
2026-07-18 AAR751 - Jul 18, 08:00 UTCJul 18, 13:35 UTC5h 35m
2026-07-18 AAR502 - Jul 18, 04:15 UTCJul 18, 04:45 UTC30m
2026-07-17 AAR502 - Jul 17, 17:44 UTCJul 18, 03:30 UTC9h 46m
2026-07-17 AAR501 - Jul 17, 02:59 UTCJul 17, 15:20 UTC12h 20m
2026-07-17 AAR501 - Jul 17, 01:45 UTCJul 17, 02:10 UTC25m
2026-07-16 AAR734 HAN → ICN Jul 16, 21:40 UTCJul 16, 22:19 UTC40m
2026-07-16 AAR733 - Jul 16, 13:15 UTCJul 16, 14:00 UTC45m
2026-07-16 AAR712 TPE → ICN Jul 16, 04:50 UTCJul 16, 06:55 UTC2h 5m
2026-07-16 AAR711 - Jul 16, 01:50 UTCJul 16, 02:05 UTC15m
2026-07-16 AAR711 - Jul 16, 00:10 UTCJul 16, 00:45 UTC35m
2026-07-15 AAR762 - Jul 15, 16:35 UTCJul 15, 21:50 UTC5h 15m
2026-07-15 AAR761 - Jul 15, 13:00 UTCJul 15, 13:20 UTC20m
2026-07-15 AAR761 - Jul 15, 07:05 UTCJul 15, 11:40 UTC4h 35m
2026-07-15 AAR522 - Jul 15, 03:20 UTCJul 15, 03:40 UTC20m
2026-07-14 AAR522 - Jul 14, 16:10 UTCJul 15, 02:30 UTC10h 19m
2026-07-14 AAR521 - Jul 14, 00:20 UTCJul 14, 12:40 UTC12h 20m
2026-07-13 AAR521 - Jul 13, 23:10 UTCJul 13, 23:30 UTC20m
2026-07-13 AAR203 - Jul 13, 06:15 UTCJul 13, 18:00 UTC11h 45m
2026-07-12 AAR204 - Jul 12, 13:01 UTCJul 13, 00:10 UTC11h 10m
2026-07-12 AAR522 - Jul 12, 03:35 UTCJul 12, 03:55 UTC20m
2026-07-11 AAR522 - Jul 11, 16:35 UTCJul 12, 02:50 UTC10h 15m
2026-07-11 AAR521 - Jul 11, 00:30 UTCJul 11, 13:05 UTC12h 35m
2026-07-10 AAR521 - Jul 10, 23:20 UTCJul 10, 23:40 UTC20m
2026-07-10 AAR203 - Jul 10, 06:35 UTCJul 10, 18:45 UTC12h 10m
2026-07-09 AAR204 - Jul 9, 13:40 UTCJul 10, 00:25 UTC10h 45m
2026-07-09 AAR712 TPE → ICN Jul 9, 04:45 UTCJul 9, 06:55 UTC2h 10m
2026-07-09 AAR711 ICN → TPE Jul 9, 00:05 UTCJul 9, 02:15 UTC2h 10m
2026-07-08 AAR734 - Jul 8, 16:55 UTCJul 8, 20:40 UTC3h 45m
2026-07-08 AAR733 - Jul 8, 10:55 UTCJul 8, 14:40 UTC3h 45m
2026-07-08 AAR562 FCO → ICN Jul 8, 05:50 UTCJul 8, 06:15 UTC25m
2026-07-07 AAR562 FCO → ICN Jul 7, 19:50 UTCJul 8, 05:00 UTC9h 10m

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 HL8308 page for operator, model, and routing details .

Mode-S 71C308 frequently asked

What is Mode-S code 71C308?
71C308 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8308.
Where is Mode-S 71C308 registered?
Mode-S code 71C308 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 71C308 broadcasting right now?
Yes. Mode-S 71C308 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C308, octal 34341410, decimal 7,455,496.
What flights does 71C308 operate?
Mode-S 71C308 has broadcast 20 distinct callsigns, including AAR522, AAR761, AAR762, AAR521, AAR548.