Apparatus

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sensors Mode-S transponder

71C045

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

Currently assigned to HL8045 · BOEING 777-200LR

Hex
71C045
Octal
34340105
Decimal
7,454,789
Country
KR
Tail
HL8045
Type
B77L
No current signal · last broadcast 1h ago
Flights observed
241
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C045.

Country allocation

The ICAO 24-bit address 71C045 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
KAL9575 - 19 2026-06-24
KAL8258 Korean Air 12 2026-06-04
KAL313 - 12 2026-07-05
KAL273 Korean Air 11 2026-05-03
KAL274 Korean Air 10 2026-05-04
KAL8257 Korean Air 9 2026-06-03
KAL8231 - 9 2026-07-06
KAL314 Korean Air 9 2026-07-05
KAL9576 - 8 2026-06-25
KAL504 Korean Air 8 2026-05-31
KAL278 Korean Air 6 2026-07-04
KAL277 - 6 2026-07-04
KAL251 - 6 2026-06-26
KAL8373 - 5 2026-06-11
KAL8374 - 4 2026-06-11
KAL8232 - 4 2026-07-07
KAL389 - 4 2026-05-28
KAL249 - 4 2026-06-22
KAL231 - 4 2026-07-13
KAL228 Korean Air 4 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL232 - Jul 14, 00:00 UTCJul 14, 01:15 UTC1h 15m
2026-07-13 KAL231 - Jul 13, 16:10 UTCJul 13, 21:45 UTC5h 35m
2026-07-13 KAL231 - Jul 13, 07:15 UTCJul 13, 14:50 UTC7h 35m
2026-07-12 KAL320 - Jul 12, 15:01 UTCJul 12, 23:45 UTC8h 45m
2026-07-12 KAL8314 HKG → ICN Jul 12, 08:55 UTCJul 12, 11:40 UTC2h 45m
2026-07-12 KAL8313 ICN → HKG Jul 12, 03:35 UTCJul 12, 06:20 UTC2h 45m
2026-07-11 KAL8518 - Jul 11, 05:25 UTCJul 11, 05:50 UTC25m
2026-07-10 KAL8518 - Jul 10, 18:25 UTCJul 11, 04:30 UTC10h 5m
2026-07-10 KAL8517 FRA → AMS Jul 10, 15:35 UTCJul 10, 16:25 UTC50m
2026-07-10 KAL8517 - Jul 10, 01:30 UTCJul 10, 13:20 UTC11h 50m
2026-07-10 KAL8517 - Jul 10, 00:20 UTCJul 10, 00:35 UTC15m
2026-07-09 KAL315 ICN → ICN Jul 9, 14:55 UTCJul 9, 21:40 UTC6h 45m
2026-07-09 KAL530 - Jul 9, 03:40 UTCJul 9, 04:05 UTC25m
2026-07-08 KAL530 - Jul 8, 17:20 UTCJul 9, 02:45 UTC9h 25m
2026-07-08 KAL529 - Jul 8, 02:45 UTCJul 8, 14:30 UTC11h 45m
2026-07-08 KAL529 - Jul 8, 01:30 UTCJul 8, 01:45 UTC15m
2026-07-07 KAL8232 - Jul 7, 04:05 UTCJul 7, 17:25 UTC13h 20m
2026-07-06 KAL8231 ANC → ORD Jul 6, 19:50 UTCJul 7, 01:25 UTC5h 35m
2026-07-06 KAL8231 ICN → ANC Jul 6, 11:15 UTCJul 6, 18:45 UTC7h 30m
2026-07-05 KAL314 HKG → HKG Jul 5, 21:40 UTCJul 5, 22:15 UTC35m
2026-07-05 KAL314 HKG → HKG Jul 5, 19:10 UTCJul 5, 20:35 UTC1h 25m
2026-07-05 KAL313 - Jul 5, 16:20 UTCJul 5, 16:35 UTC15m
2026-07-05 KAL313 - Jul 5, 13:35 UTCJul 5, 15:45 UTC2h 10m
2026-07-04 KAL278 YVR → ICN Jul 4, 22:30 UTCJul 5, 09:30 UTC11h 0m
2026-07-04 KAL278 YVR → ICN Jul 4, 12:05 UTCJul 4, 20:40 UTC8h 35m
2026-07-04 KAL277 ANC → DFW Jul 4, 04:25 UTCJul 4, 10:05 UTC5h 40m
2026-07-03 KAL277 - Jul 3, 19:35 UTCJul 4, 03:05 UTC7h 30m
2026-07-03 KAL232 - Jul 3, 02:30 UTCJul 3, 17:30 UTC15h 0m
2026-07-02 KAL231 ANC → ORD Jul 2, 17:30 UTCJul 2, 23:20 UTC5h 50m
2026-07-02 KAL231 - Jul 2, 08:35 UTCJul 2, 16:00 UTC7h 25m
2026-07-01 KAL314 HKG → HKG Jul 1, 19:05 UTCJul 1, 22:05 UTC3h 0m
2026-07-01 KAL313 - Jul 1, 13:40 UTCJul 1, 16:45 UTC3h 5m
2026-07-01 KAL342 - Jul 1, 06:50 UTCJul 1, 09:15 UTC2h 25m
2026-06-30 KAL341 - Jun 30, 22:05 UTCJun 30, 22:20 UTC15m
2026-06-30 KAL341 - Jun 30, 16:40 UTCJun 30, 19:25 UTC2h 45m
2026-06-29 KAL240 - Jun 29, 16:19 UTCJun 30, 06:20 UTC14h 0m
2026-06-29 KAL239 - Jun 29, 08:04 UTCJun 29, 13:44 UTC5h 40m
2026-06-28 KAL239 - Jun 28, 17:10 UTCJun 29, 06:40 UTC13h 30m
2026-06-28 KAL350 - Jun 28, 06:00 UTCJun 28, 08:44 UTC2h 45m
2026-06-28 KAL350 - Jun 28, 02:54 UTCJun 28, 03:05 UTC10m
2026-06-27 KAL349 - Jun 27, 23:04 UTCJun 28, 00:59 UTC1h 55m
2026-06-27 KAL349 - Jun 27, 20:04 UTCJun 27, 20:19 UTC15m
2026-06-27 KAL349 - Jun 27, 13:49 UTCJun 27, 18:35 UTC4h 45m
2026-06-27 KAL558 - Jun 27, 10:10 UTCJun 27, 11:00 UTC50m
2026-06-27 KAL557 - Jun 27, 06:35 UTCJun 27, 07:15 UTC40m
2026-06-26 KAL252 JFK → ICN Jun 26, 13:10 UTCJun 27, 04:15 UTC15h 5m
2026-06-26 KAL251 - Jun 26, 07:55 UTCJun 26, 10:15 UTC2h 20m
2026-06-25 KAL251 ANC → MIA Jun 25, 21:59 UTCJun 26, 05:30 UTC7h 30m
2026-06-25 KAL251 - Jun 25, 13:20 UTCJun 25, 20:49 UTC7h 30m
2026-06-25 KAL9576 - Jun 25, 05:20 UTCJun 25, 05:55 UTC35m

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 HL8045 page for operator, model, and routing details .

Mode-S 71C045 frequently asked

What is Mode-S code 71C045?
71C045 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8045.
Where is Mode-S 71C045 registered?
Mode-S code 71C045 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 71C045 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C045, octal 34340105, decimal 7,454,789.
What flights does 71C045 operate?
Mode-S 71C045 has broadcast 20 distinct callsigns, including KAL9575, KAL8258, KAL313, KAL273, KAL274.