Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast 4h ago
Flights observed
197
Distinct callsigns
20
Country
KR
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 71C308.

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
AAR761 - 15 2026-07-04
AAR522 - 15 2026-07-12
AAR762 - 12 2026-07-04
AAR521 - 12 2026-07-14
AAR548 - 9 2026-07-04
AAR582 - 8 2026-07-01
AAR581 - 8 2026-06-30
AAR547 - 8 2026-07-03
AAR502 - 8 2026-06-20
AAR501 - 8 2026-06-19
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
AAR222 - 6 2026-07-04
AAR752 Asiana Airlines 5 2026-06-10
AAR751 Asiana Airlines 4 2026-06-10
AAR734 - 4 2026-07-08
AAR733 - 4 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAR521 - Jul 14, 00:20 UTCJul 14, 00:35 UTC15m
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
2026-07-07 AAR561 - Jul 7, 13:25 UTCJul 7, 17:30 UTC4h 5m
2026-07-07 AAR561 - Jul 7, 04:50 UTCJul 7, 05:10 UTC20m
2026-07-05 AAR221 JFK → ICN Jul 5, 16:20 UTCJul 6, 07:15 UTC14h 55m
2026-07-04 AAR222 - Jul 4, 23:50 UTCJul 5, 13:05 UTC13h 15m
2026-07-04 AAR762 - Jul 4, 16:30 UTCJul 4, 21:25 UTC4h 55m
2026-07-04 AAR761 - Jul 4, 12:45 UTCJul 4, 13:05 UTC20m
2026-07-04 AAR761 - Jul 4, 06:40 UTCJul 4, 11:30 UTC4h 50m
2026-07-04 AAR548 - Jul 4, 04:10 UTCJul 4, 04:30 UTC20m
2026-07-03 AAR548 - Jul 3, 18:35 UTCJul 4, 03:20 UTC8h 45m
2026-07-03 AAR547 - Jul 3, 05:30 UTCJul 3, 16:10 UTC10h 40m
2026-07-03 AAR547 - Jul 3, 04:20 UTCJul 3, 04:35 UTC15m
2026-07-02 AAR211 - Jul 2, 07:05 UTCJul 2, 18:45 UTC11h 40m
2026-07-01 AAR212 ICN → SFO Jul 1, 12:25 UTCJul 1, 22:25 UTC10h 0m
2026-07-01 AAR582 - Jul 1, 06:45 UTCJul 1, 07:10 UTC25m
2026-06-30 AAR582 - Jun 30, 20:25 UTCJul 1, 05:55 UTC9h 30m
2026-06-30 AAR581 - Jun 30, 06:25 UTCJun 30, 18:10 UTC11h 45m
2026-06-30 AAR581 - Jun 30, 05:15 UTCJun 30, 05:30 UTC15m
2026-06-30 AAR115 - Jun 30, 00:55 UTCJun 30, 02:10 UTC1h 15m
2026-06-29 AAR116 ICN → KIX Jun 29, 10:55 UTCJun 29, 12:29 UTC1h 35m
2026-06-29 AAR522 - Jun 29, 03:29 UTCJun 29, 03:54 UTC25m
2026-06-28 AAR522 - Jun 28, 16:09 UTCJun 29, 02:39 UTC10h 30m
2026-06-27 AAR521 ICN → LHR Jun 27, 23:14 UTCJun 28, 12:55 UTC13h 40m
2026-06-27 AAR734 - Jun 27, 16:55 UTCJun 27, 20:34 UTC3h 40m
2026-06-27 AAR733 - Jun 27, 11:04 UTCJun 27, 14:45 UTC3h 40m
2026-06-26 AAR221 JFK → ICN Jun 26, 16:20 UTCJun 27, 07:15 UTC14h 55m
2026-06-25 AAR222 ICN → JFK Jun 25, 23:49 UTCJun 26, 12:59 UTC13h 10m
2026-06-25 AAR211 - Jun 25, 07:09 UTCJun 25, 18:55 UTC11h 45m
2026-06-24 AAR212 ICN → SFO Jun 24, 12:20 UTCJun 24, 21:54 UTC9h 35m
2026-06-24 AAR221 - Jun 24, 06:25 UTCJun 24, 06:55 UTC30m
2026-06-23 AAR221 - Jun 23, 16:35 UTCJun 24, 05:54 UTC13h 20m
2026-06-23 AAR222 ICN → JFK Jun 23, 00:45 UTCJun 23, 13:55 UTC13h 10m
2026-06-22 AAR762 - Jun 22, 16:29 UTCJun 22, 21:30 UTC5h 0m
2026-06-22 AAR761 - Jun 22, 12:25 UTCJun 22, 12:40 UTC15m
2026-06-22 AAR761 - Jun 22, 06:19 UTCJun 22, 11:00 UTC4h 40m

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?
No active broadcast right now. Last signal was 4h ago.
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 AAR761, AAR522, AAR762, AAR521, AAR548.