Apparatus

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sensors Mode-S transponder

71C712

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

Currently assigned to HL8712 · AIRBUS A-321neo

Hex
71C712
Octal
34343422
Decimal
7,456,530
Country
KR
Tail
HL8712
Type
A21N
No current signal · last broadcast Jul 26, 12:15 UTC
Flights observed
415
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:15 UTC

Last known position

Most recent position reported by Mode-S 71C712.

Country allocation

The ICAO 24-bit address 71C712 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
KAL2005 - 17 2026-06-17
KAL1408 Korean Air 11 2026-07-19
KAL712 Korean Air 10 2026-07-20
KAL711 Korean Air 10 2026-07-22
KAL2174 - 10 2026-07-06
KAL2173 - 10 2026-07-06
KAL2171 - 10 2026-07-02
KAL2006 - 10 2026-06-17
KAL1403 Korean Air 10 2026-07-18
KAL864 - 9 2026-07-16
KAL2172 - 9 2026-07-02
KAL485 - 8 2026-07-02
KAL2194 - 8 2026-07-15
KAL2193 - 8 2026-07-15
KAL1407 Korean Air 8 2026-07-25
KAL852 Korean Air 7 2026-07-18
KAL792 Korean Air 7 2026-07-24
KAL738 - 7 2026-07-17
KAL737 - 7 2026-07-17
KAL2147 - 7 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL2132 NRT → PUS Jul 26, 10:35 UTCJul 26, 12:10 UTC1h 35m
2026-07-26 KAL2131 PUS → NRT Jul 26, 07:10 UTCJul 26, 08:50 UTC1h 40m
2026-07-26 KAL2130 NRT → PUS Jul 26, 04:00 UTCJul 26, 05:45 UTC1h 45m
2026-07-26 KAL2129 PUS → NRT Jul 26, 00:35 UTCJul 26, 02:25 UTC1h 50m
2026-07-25 KAL1407 ICN → PUS Jul 25, 09:50 UTCJul 25, 10:30 UTC40m
2026-07-24 KAL417 ICN → GUM Jul 24, 09:45 UTCJul 24, 20:30 UTC10h 45m
2026-07-24 KAL792 OIT → ICN Jul 24, 06:15 UTCJul 24, 07:20 UTC1h 5m
2026-07-24 KAL791 ICN → FUK Jul 24, 02:25 UTCJul 24, 03:30 UTC1h 5m
2026-07-23 KAL1406 PUS → ICN Jul 23, 23:55 UTCJul 24, 00:35 UTC40m
2026-07-23 KAL1401 ICN → PUS Jul 23, 21:55 UTCJul 23, 22:40 UTC45m
2026-07-23 KAL458 DAD → ICN Jul 23, 03:10 UTCJul 23, 13:40 UTC10h 30m
2026-07-22 KAL656 BKK → ICN Jul 22, 19:55 UTCJul 23, 01:05 UTC5h 10m
2026-07-22 KAL655 ICN → BKK Jul 22, 13:00 UTCJul 22, 18:20 UTC5h 20m
2026-07-22 KAL711 ICN → NRT Jul 22, 04:35 UTCJul 22, 10:25 UTC5h 50m
2026-07-22 KAL1406 PUS → ICN Jul 22, 00:00 UTCJul 22, 00:40 UTC40m
2026-07-21 KAL1401 ICN → PUS Jul 21, 21:55 UTCJul 21, 22:35 UTC40m
2026-07-21 KAL457 ICN → DAD Jul 21, 03:10 UTCJul 21, 13:25 UTC10h 15m
2026-07-20 KAL656 - Jul 20, 20:00 UTCJul 21, 01:10 UTC5h 10m
2026-07-20 KAL655 ICN → BKK Jul 20, 12:40 UTCJul 20, 17:45 UTC5h 5m
2026-07-20 KAL712 NRT → ICN Jul 20, 08:35 UTCJul 20, 10:30 UTC1h 55m
2026-07-20 KAL711 ICN → NRT Jul 20, 04:25 UTCJul 20, 06:35 UTC2h 10m
2026-07-19 KAL656 - Jul 19, 22:10 UTCJul 20, 01:00 UTC2h 50m
2026-07-19 KAL656 - Jul 19, 19:55 UTCJul 19, 20:10 UTC15m
2026-07-19 KAL655 - Jul 19, 12:35 UTCJul 19, 17:45 UTC5h 10m
2026-07-19 KAL712 NRT → ICN Jul 19, 08:35 UTCJul 19, 10:25 UTC1h 50m
2026-07-19 KAL711 ICN → NRT Jul 19, 04:15 UTCJul 19, 06:30 UTC2h 15m
2026-07-19 KAL1408 PUS → ICN Jul 19, 01:45 UTCJul 19, 02:30 UTC45m
2026-07-18 KAL1403 ICN → PUS Jul 18, 23:40 UTCJul 19, 00:20 UTC40m
2026-07-18 KAL852 PEK → ICN Jul 18, 12:10 UTCJul 18, 12:40 UTC30m
2026-07-18 KAL2065 - Jul 18, 09:00 UTCJul 18, 09:15 UTC15m
2026-07-18 KAL2065 - Jul 18, 07:15 UTCJul 18, 07:55 UTC40m
2026-07-18 KAL2066 - Jul 18, 04:05 UTCJul 18, 04:45 UTC40m
2026-07-17 KAL851 ICN → PEK Jul 17, 23:35 UTCJul 17, 23:55 UTC20m
2026-07-17 KAL738 KIX → ICN Jul 17, 17:35 UTCJul 17, 18:55 UTC1h 20m
2026-07-17 KAL737 ICN → KIX Jul 17, 12:10 UTCJul 17, 13:35 UTC1h 25m
2026-07-17 KAL770 - Jul 17, 07:40 UTCJul 17, 09:55 UTC2h 15m
2026-07-17 KAL769 ICN → CTS Jul 17, 03:55 UTCJul 17, 06:05 UTC2h 10m
2026-07-16 KAL1406 PUS → ICN Jul 16, 23:44 UTCJul 17, 00:25 UTC40m
2026-07-16 KAL1401 ICN → PUS Jul 16, 21:50 UTCJul 16, 22:35 UTC45m
2026-07-16 KAL864 - Jul 16, 18:40 UTCJul 16, 19:10 UTC30m
2026-07-16 KAL864 - Jul 16, 17:45 UTCJul 16, 17:54 UTC10m
2026-07-16 KAL863 - Jul 16, 11:20 UTCJul 16, 11:45 UTC25m
2026-07-16 KAL792 - Jul 16, 06:15 UTCJul 16, 07:10 UTC55m
2026-07-16 KAL791 - Jul 16, 02:20 UTCJul 16, 03:30 UTC1h 10m
2026-07-15 KAL772 - Jul 15, 12:05 UTCJul 15, 14:40 UTC2h 35m
2026-07-15 KAL771 ICN → CTS Jul 15, 08:30 UTCJul 15, 10:50 UTC2h 20m
2026-07-15 KAL2194 - Jul 15, 04:15 UTCJul 15, 05:55 UTC1h 40m
2026-07-15 KAL2193 - Jul 15, 00:35 UTCJul 15, 02:35 UTC2h 0m
2026-07-14 KAL738 KIX → ICN Jul 14, 17:35 UTCJul 14, 18:55 UTC1h 20m
2026-07-14 KAL737 - Jul 14, 12:40 UTCJul 14, 14:00 UTC1h 20m

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 HL8712 page for operator, model, and routing details .

Mode-S 71C712 frequently asked

What is Mode-S code 71C712?
71C712 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8712.
Where is Mode-S 71C712 registered?
Mode-S code 71C712 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 71C712 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C712, octal 34343422, decimal 7,456,530.
What flights does 71C712 operate?
Mode-S 71C712 has broadcast 20 distinct callsigns, including KAL2005, KAL1408, KAL712, KAL711, KAL2174.