Apparatus

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sensors Mode-S transponder

71C744

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

Currently assigned to HL8744 · AIRBUS A-320

Hex
71C744
Octal
34343504
Decimal
7,456,580
Country
KR
Tail
HL8744
Type
A320
No current signal · last broadcast 19d ago
Flights observed
388
Distinct callsigns
20
Country
KR
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S 71C744.

Country allocation

The ICAO 24-bit address 71C744 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
EOK512 - 31 2026-06-25
EOK511 - 25 2026-06-25
EOK332 - 20 2026-06-24
EOK331 - 20 2026-06-24
EOK342 - 19 2026-06-25
EOK341 - 19 2026-06-25
EOK614 - 17 2026-06-24
EOK613 - 16 2026-06-24
EOK610 - 16 2026-06-24
EOK609 - 16 2026-06-24
EOK393 - 13 2026-06-23
EOK321 Aero K 12 2026-06-05
EOK311 - 10 2026-06-18
EOK557 Aero K 9 2026-05-06
EOK385 Aero K 9 2026-05-27
EOK322 Aero K 9 2026-06-05
EOK312 - 9 2026-06-17
EOK394 Aero K 8 2026-06-20
EOK386 Aero K 8 2026-05-27
EOK317 - 8 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-25 EOK341 - Jun 25, 11:35 UTCJun 25, 12:54 UTC1h 20m
2026-06-25 EOK342 - Jun 25, 08:50 UTCJun 25, 09:55 UTC1h 5m
2026-06-25 EOK512 - Jun 25, 06:50 UTCJun 25, 07:25 UTC35m
2026-06-25 EOK512 - Jun 25, 05:25 UTCJun 25, 05:50 UTC25m
2026-06-25 EOK511 - Jun 25, 03:24 UTCJun 25, 03:44 UTC20m
2026-06-25 EOK511 - Jun 25, 01:44 UTCJun 25, 02:14 UTC30m
2026-06-24 EOK331 - Jun 24, 23:40 UTCJun 25, 00:24 UTC45m
2026-06-24 EOK332 - Jun 24, 21:50 UTCJun 24, 22:19 UTC30m
2026-06-24 EOK614 - Jun 24, 12:50 UTCJun 24, 13:20 UTC30m
2026-06-24 EOK613 - Jun 24, 09:55 UTCJun 24, 10:25 UTC30m
2026-06-24 EOK610 - Jun 24, 08:04 UTCJun 24, 08:39 UTC35m
2026-06-24 EOK609 - Jun 24, 05:49 UTCJun 24, 06:20 UTC30m
2026-06-23 EOK393 - Jun 23, 22:10 UTCJun 24, 03:29 UTC5h 20m
2026-06-23 EOK323 - Jun 23, 10:39 UTCJun 23, 12:40 UTC2h 0m
2026-06-23 EOK324 - Jun 23, 07:29 UTCJun 23, 09:20 UTC1h 50m
2026-06-23 EOK351 - Jun 23, 03:09 UTCJun 23, 05:34 UTC2h 25m
2026-06-22 EOK352 - Jun 22, 23:29 UTCJun 23, 01:40 UTC2h 10m
2026-06-22 EOK341 - Jun 22, 11:35 UTCJun 22, 12:59 UTC1h 25m
2026-06-22 EOK342 - Jun 22, 08:50 UTCJun 22, 09:54 UTC1h 5m
2026-06-22 EOK512 - Jun 22, 05:29 UTCJun 22, 07:30 UTC2h 0m
2026-06-22 EOK511 - Jun 22, 01:55 UTCJun 22, 04:00 UTC2h 5m
2026-06-21 EOK331 - Jun 21, 23:44 UTCJun 22, 00:34 UTC50m
2026-06-21 EOK332 - Jun 21, 22:00 UTCJun 21, 22:34 UTC35m
2026-06-21 EOK317 - Jun 21, 10:19 UTCJun 21, 11:34 UTC1h 15m
2026-06-21 EOK318 - Jun 21, 07:14 UTCJun 21, 08:30 UTC1h 15m
2026-06-20 EOK394 CJJ → OKA Jun 20, 22:10 UTCJun 21, 02:45 UTC4h 35m
2026-06-20 EOK512 - Jun 20, 05:24 UTCJun 20, 07:29 UTC2h 5m
2026-06-20 EOK511 - Jun 20, 01:39 UTCJun 20, 03:49 UTC2h 10m
2026-06-19 EOK331 - Jun 19, 23:44 UTCJun 20, 00:29 UTC45m
2026-06-19 EOK332 - Jun 19, 21:39 UTCJun 19, 22:19 UTC40m
2026-06-19 EOK341 - Jun 19, 11:39 UTCJun 19, 12:59 UTC1h 20m
2026-06-19 EOK342 - Jun 19, 08:40 UTCJun 19, 09:49 UTC1h 10m
2026-06-19 EOK512 - Jun 19, 06:49 UTCJun 19, 07:14 UTC25m
2026-06-19 EOK512 - Jun 19, 05:19 UTCJun 19, 05:45 UTC25m
2026-06-19 EOK511 - Jun 19, 01:50 UTCJun 19, 03:49 UTC2h 0m
2026-06-18 EOK371 - Jun 18, 07:00 UTCJun 18, 07:40 UTC40m
2026-06-18 EOK372 - Jun 18, 04:50 UTCJun 18, 05:25 UTC35m
2026-06-18 EOK311 - Jun 18, 02:35 UTCJun 18, 03:45 UTC1h 10m
2026-06-17 EOK312 - Jun 17, 23:25 UTCJun 18, 00:40 UTC1h 15m
2026-06-17 EOK3053 - Jun 17, 19:25 UTCJun 17, 21:20 UTC1h 55m
2026-06-17 EOK3063 CJJ → HND Jun 17, 14:30 UTCJun 17, 16:05 UTC1h 35m
2026-06-17 EOK341 - Jun 17, 11:55 UTCJun 17, 13:10 UTC1h 15m
2026-06-17 EOK342 - Jun 17, 08:45 UTCJun 17, 10:00 UTC1h 15m
2026-06-17 EOK512 - Jun 17, 07:05 UTCJun 17, 07:35 UTC30m
2026-06-17 EOK512 - Jun 17, 05:20 UTCJun 17, 05:50 UTC30m
2026-06-17 EOK511 - Jun 17, 01:10 UTCJun 17, 03:20 UTC2h 10m
2026-06-16 EOK323 - Jun 16, 11:10 UTCJun 16, 12:55 UTC1h 45m
2026-06-16 EOK324 - Jun 16, 07:30 UTCJun 16, 09:20 UTC1h 50m
2026-06-15 EOK393 - Jun 15, 21:55 UTCJun 16, 02:34 UTC4h 40m
2026-06-15 EOK317 - Jun 15, 10:00 UTCJun 15, 11:15 UTC1h 15m

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 HL8744 page for operator, model, and routing details .

Mode-S 71C744 frequently asked

What is Mode-S code 71C744?
71C744 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8744.
Where is Mode-S 71C744 registered?
Mode-S code 71C744 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 71C744 broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C744, octal 34343504, decimal 7,456,580.
What flights does 71C744 operate?
Mode-S 71C744 has broadcast 20 distinct callsigns, including EOK512, EOK511, EOK332, EOK331, EOK342.