Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C274

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

Currently assigned to HL8274 · BOEING 777-300ER

Hex
71C274
Octal
34341164
Decimal
7,455,348
Country
KR
Tail
HL8274
Type
B77W
No current signal · last broadcast 5h ago
Flights observed
123
Distinct callsigns
20
Country
KR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 71C274.

Country allocation

The ICAO 24-bit address 71C274 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
KAL038 Korean Air 12 2026-05-23
KAL092 Korean Air 11 2026-05-16
KAL037 Korean Air 11 2026-05-23
KAL926 Korean Air 9 2026-05-29
KAL925 Korean Air 6 2026-05-29
KAL652 Korean Air 6 2026-05-28
KAL651 Korean Air 6 2026-05-28
KAL788 Korean Air 5 2026-05-13
KAL787 Korean Air 5 2026-05-12
KAL946 Korean Air 4 2026-05-28
KAL945 Korean Air 4 2026-05-27
KAL624 Korean Air 4 2026-04-22
KAL623 Korean Air 4 2026-04-22
KAL091 Korean Air 4 2026-05-16
KAL645 Korean Air 3 2026-05-20
KAL643 Korean Air 3 2026-05-05
KAL622 Korean Air 3 2026-04-16
KAL476 Korean Air 3 2026-05-17
KAL9982 Korean Air 2 2026-05-14
KAL646 Korean Air 2 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 KAL926 AMS → ICN May 29, 20:20 UTCMay 30, 00:10 UTC3h 50m
2026-05-29 KAL925 ICN → AMS May 29, 05:15 UTCMay 29, 17:30 UTC12h 15m
2026-05-29 KAL925 ICN → AMS May 29, 03:55 UTCMay 29, 04:10 UTC15m
2026-05-28 KAL652 BKK → ICN May 28, 16:50 UTCMay 28, 21:45 UTC4h 55m
2026-05-28 KAL651 ICN → BKK May 28, 09:35 UTCMay 28, 14:25 UTC4h 50m
2026-05-28 KAL946 FRA → ICN May 28, 05:15 UTCMay 28, 05:35 UTC20m
2026-05-27 KAL946 FRA → ICN May 27, 18:40 UTCMay 28, 04:30 UTC9h 50m
2026-05-27 KAL945 ICN → FRA May 27, 03:39 UTCMay 27, 15:40 UTC12h 1m
2026-05-27 KAL945 ICN → FRA May 27, 02:19 UTCMay 27, 02:39 UTC20m
2026-05-26 KAL652 BKK → ICN May 26, 16:55 UTCMay 26, 21:44 UTC4h 50m
2026-05-26 KAL651 ICN → BKK May 26, 09:25 UTCMay 26, 14:24 UTC5h 0m
2026-05-26 KAL926 AMS → ICN May 26, 06:44 UTCMay 26, 07:10 UTC25m
2026-05-25 KAL926 AMS → ICN May 25, 19:40 UTCMay 26, 05:54 UTC10h 15m
2026-05-25 KAL925 ICN → AMS May 25, 03:25 UTCMay 25, 13:10 UTC9h 45m
2026-05-24 KAL652 BKK → ICN May 24, 17:40 UTCMay 24, 20:55 UTC3h 15m
2026-05-24 KAL651 ICN → BKK May 24, 09:35 UTCMay 24, 14:30 UTC4h 55m
2026-05-23 KAL038 ORD → ICN May 23, 18:15 UTCMay 24, 07:35 UTC13h 20m
2026-05-23 KAL037 ICN → ORD May 23, 02:30 UTCMay 23, 14:30 UTC12h 0m
2026-05-21 KAL038 ORD → ICN May 21, 17:45 UTCMay 22, 07:25 UTC13h 40m
2026-05-21 KAL037 ICN → ORD May 21, 02:00 UTCMay 21, 14:05 UTC12h 5m
2026-05-20 KAL646 SIN → ICN May 20, 20:45 UTCMay 20, 23:40 UTC2h 55m
2026-05-20 KAL645 PUS → CBO May 20, 10:10 UTCMay 20, 15:45 UTC5h 35m
2026-05-20 KAL926 AMS → ICN May 20, 07:35 UTCMay 20, 07:55 UTC20m
2026-05-19 KAL926 AMS → ICN May 19, 20:05 UTCMay 20, 06:30 UTC10h 26m
2026-05-19 KAL925 ICN → AMS May 19, 03:45 UTCMay 19, 17:15 UTC13h 30m
2026-05-18 KAL2022 TPE → ICN May 18, 05:35 UTCMay 18, 07:40 UTC2h 5m
2026-05-18 KAL2021 ICN → TPE May 18, 02:00 UTCMay 18, 03:55 UTC1h 55m
2026-05-17 KAL476 SGN → ICN May 17, 10:35 UTCMay 17, 22:30 UTC11h 55m
2026-05-16 KAL092 BOS → ICN May 16, 17:20 UTCMay 17, 08:15 UTC14h 55m
2026-05-16 KAL091 ICN → BOS May 16, 00:50 UTCMay 16, 14:20 UTC13h 31m
2026-05-14 KAL438 CGK → ICN May 14, 17:05 UTCMay 14, 22:15 UTC5h 10m
2026-05-14 KAL438 CGK → ICN May 14, 15:30 UTCMay 14, 15:40 UTC10m
2026-05-14 KAL437 ICN → CGK May 14, 07:05 UTCMay 14, 11:45 UTC4h 40m
2026-05-14 KAL9982 OSL → ICN May 14, 04:45 UTCMay 14, 05:10 UTC25m
2026-05-13 KAL9982 OSL → ICN May 13, 19:15 UTCMay 13, 21:30 UTC2h 15m
2026-05-13 KAL9981 ICN → ATH May 13, 13:45 UTCMay 13, 16:55 UTC3h 10m
2026-05-13 KAL788 FUK → ICN May 13, 02:15 UTCMay 13, 03:10 UTC55m
2026-05-12 KAL787 ICN → FUK May 12, 23:40 UTCMay 13, 00:10 UTC30m
2026-05-12 KAL196P PUS → ICN May 12, 09:15 UTCMay 12, 09:45 UTC30m
2026-05-05 KAL197F ICN → PUS May 5, 22:20 UTCMay 5, 22:45 UTC25m
2026-05-05 KAL644 SIN → ICN May 5, 17:20 UTCMay 5, 19:55 UTC2h 35m
2026-05-05 KAL643 ICN → SIN May 5, 05:10 UTCMay 5, 11:05 UTC5h 55m
2026-05-05 KAL788 FUK → ICN May 5, 02:05 UTCMay 5, 03:00 UTC55m
2026-05-04 KAL787 ICN → FUK May 4, 23:25 UTCMay 4, 23:50 UTC25m
2026-05-04 KAL038 ORD → ICN May 4, 07:55 UTCMay 4, 08:20 UTC25m
2026-05-03 KAL038 ORD → ICN May 3, 17:45 UTCMay 4, 07:05 UTC13h 20m
2026-05-03 KAL037 ICN → ORD May 3, 02:15 UTCMay 3, 14:15 UTC11h 59m
2026-05-02 KAL766 CTS → ICN May 2, 06:05 UTCMay 2, 08:40 UTC2h 35m
2026-05-02 KAL765 ICN → CTS May 2, 02:00 UTCMay 2, 04:10 UTC2h 10m
2026-05-01 KAL646 SIN → ICN May 1, 21:15 UTCMay 2, 00:00 UTC2h 45m

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 HL8274 page for operator, model, and routing details .

Mode-S 71C274 frequently asked

What is Mode-S code 71C274?
71C274 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8274.
Where is Mode-S 71C274 registered?
Mode-S code 71C274 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 71C274 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C274, octal 34341164, decimal 7,455,348.
What flights does 71C274 operate?
Mode-S 71C274 has broadcast 20 distinct callsigns, including KAL038, KAL092, KAL037, KAL926, KAL925.