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
Broadcasting now · callsign EOK342 · 3,625 ft
Flights observed
247
Distinct callsigns
20
Country
KR
Last broadcast
52m ago

Current position

71C744 is currently broadcasting. Map zoomed to live position.

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
EOK614 - 13 2026-05-22
EOK613 Aero K 12 2026-05-22
EOK610 Aero K 12 2026-05-22
EOK609 Aero K 12 2026-05-22
EOK512 Aero K 12 2026-05-30
EOK511 Aero K 11 2026-05-30
EOK393 Aero K 11 2026-05-28
EOK321 Aero K 11 2026-05-04
EOK557 Aero K 9 2026-05-06
EOK385 Aero K 9 2026-05-27
EOK386 Aero K 8 2026-05-27
EOK332 Aero K 8 2026-05-29
EOK331 - 8 2026-05-29
EOK322 Aero K 8 2026-05-04
EOK311 Aero K 8 2026-05-27
EOK394 Aero K 7 2026-05-25
EOK342 Aero K 7 2026-05-30
EOK341 Aero K 7 2026-05-24
EOK312 Aero K 7 2026-05-17
EOK336 Aero K 6 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EOK342 CJJ → NGO May 30, 08:50 UTCMay 30, 09:00 UTC10m
2026-05-30 EOK512 TPE → CJJ May 30, 07:05 UTCMay 30, 07:25 UTC20m
2026-05-30 EOK512 TPE → CJJ May 30, 05:30 UTCMay 30, 05:55 UTC25m
2026-05-30 EOK511 CJJ → TPE May 30, 01:40 UTCMay 30, 03:50 UTC2h 10m
2026-05-29 EOK331 - May 29, 23:35 UTCMay 30, 00:25 UTC50m
2026-05-29 EOK332 CJJ → FUK May 29, 21:40 UTCMay 29, 22:00 UTC20m
2026-05-29 EOK335 FUK → CJJ May 29, 07:40 UTCMay 29, 08:00 UTC20m
2026-05-29 EOK336 CJJ → FUK May 29, 04:55 UTCMay 29, 05:15 UTC20m
2026-05-28 EOK393 OKA → CJJ May 28, 21:55 UTCMay 29, 03:25 UTC5h 30m
2026-05-28 EOK317 KIX → CJJ May 28, 10:15 UTCMay 28, 11:25 UTC1h 10m
2026-05-28 EOK318 CJJ → KIX May 28, 06:55 UTCMay 28, 08:20 UTC1h 25m
2026-05-28 EOK351 CTS → CJJ May 28, 03:00 UTCMay 28, 05:20 UTC2h 20m
2026-05-27 EOK352 CJJ → CTS May 27, 23:30 UTCMay 28, 01:35 UTC2h 5m
2026-05-27 EOK385 HIJ → CJJ May 27, 06:55 UTCMay 27, 08:05 UTC1h 10m
2026-05-27 EOK386 CJJ → HIJ May 27, 04:39 UTCMay 27, 05:40 UTC1h 0m
2026-05-27 EOK311 KIX → CJJ May 27, 02:14 UTCMay 27, 03:29 UTC1h 15m
2026-05-26 EOK393 OKA → CJJ May 26, 02:19 UTCMay 26, 02:44 UTC25m
2026-05-25 EOK394 CJJ → OKA May 25, 22:05 UTCMay 25, 22:25 UTC20m
2026-05-25 EOK305 KIX → CJJ May 25, 11:55 UTCMay 25, 12:50 UTC55m
2026-05-25 EOK306 CJJ → KIX May 25, 09:20 UTCMay 25, 10:40 UTC1h 20m
2026-05-25 EOK385 HIJ → CJJ May 25, 06:55 UTCMay 25, 07:55 UTC1h 0m
2026-05-25 EOK386 CJJ → HIJ May 25, 04:35 UTCMay 25, 05:30 UTC55m
2026-05-25 EOK393 OKA → CJJ May 25, 02:20 UTCMay 25, 02:45 UTC25m
2026-05-24 EOK341 NGO → CJJ May 24, 11:40 UTCMay 24, 13:05 UTC1h 25m
2026-05-24 EOK342 CJJ → NGO May 24, 08:55 UTCMay 24, 10:05 UTC1h 10m
2026-05-24 EOK512 TPE → CJJ May 24, 05:15 UTCMay 24, 07:15 UTC2h 0m
2026-05-24 EOK511 CJJ → TPE May 24, 01:40 UTCMay 24, 03:45 UTC2h 5m
2026-05-23 EOK331 - May 23, 23:40 UTCMay 24, 00:30 UTC50m
2026-05-23 EOF332 - May 23, 21:45 UTCMay 23, 22:00 UTC15m
2026-05-23 EOK341 NGO → CJJ May 23, 11:40 UTCMay 23, 13:05 UTC1h 25m
2026-05-23 EOK342 CJJ → NGO May 23, 09:00 UTCMay 23, 10:05 UTC1h 5m
2026-05-23 EOK512 TPE → CJJ May 23, 05:30 UTCMay 23, 07:30 UTC2h 0m
2026-05-23 EOK511 CJJ → TPE May 23, 03:45 UTCMay 23, 04:20 UTC35m
2026-05-23 EOK511 CJJ → TPE May 23, 02:00 UTCMay 23, 02:20 UTC20m
2026-05-22 EOK331 - May 22, 23:35 UTCMay 23, 00:25 UTC50m
2026-05-22 EOK332 CJJ → FUK May 22, 21:45 UTCMay 22, 22:05 UTC20m
2026-05-22 EOK614 - May 22, 13:00 UTCMay 22, 13:20 UTC20m
2026-05-22 EOK613 CJJ → CJU May 22, 10:00 UTCMay 22, 10:25 UTC25m
2026-05-22 EOK610 CJU → CJJ May 22, 08:30 UTCMay 22, 08:55 UTC25m
2026-05-22 EOK609 CJJ → CJU May 22, 05:45 UTCMay 22, 06:05 UTC20m
2026-05-22 EOK373 - May 22, 03:20 UTCMay 22, 03:50 UTC30m
2026-05-21 EOK374 - May 21, 23:15 UTCMay 21, 23:35 UTC20m
2026-05-21 EOK317 KIX → CJJ May 21, 10:15 UTCMay 21, 11:45 UTC1h 30m
2026-05-21 EOK318 CJJ → KIX May 21, 07:00 UTCMay 21, 08:15 UTC1h 15m
2026-05-21 EOK351 CTS → CJJ May 21, 03:00 UTCMay 21, 05:25 UTC2h 25m
2026-05-20 EOK352 CJJ → CTS May 20, 23:35 UTCMay 21, 01:30 UTC1h 55m
2026-05-20 EOK614 - May 20, 13:00 UTCMay 20, 13:25 UTC25m
2026-05-20 EOK613 CJJ → CJU May 20, 09:50 UTCMay 20, 10:05 UTC15m
2026-05-20 EOK610 CJU → CJJ May 20, 07:55 UTCMay 20, 08:20 UTC25m
2026-05-20 EOK609 CJJ → CJU May 20, 05:45 UTCMay 20, 06:05 UTC20m

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?
Yes. Mode-S 71C744 is currently airborne.
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 EOK614, EOK613, EOK610, EOK609, EOK512.