Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C366

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

Currently assigned to HL8366 · AIRBUS A-321neo

Hex
71C366
Octal
34341546
Decimal
7,455,590
Country
KR
Tail
HL8366
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
290
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C366.

Country allocation

The ICAO 24-bit address 71C366 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
ABL602 - 31 2026-07-13
ABL601 - 27 2026-07-13
ABL726 - 25 2026-07-11
ABL725 - 21 2026-07-11
ABL181 - 20 2026-07-14
ABL1635 - 13 2026-07-13
ABL8803 - 12 2026-07-14
ABL182 - 12 2026-07-14
ABL8012 - 11 2026-07-14
ABL1645 - 11 2026-07-13
ABL794 - 8 2026-07-09
ABL793 - 8 2026-07-09
ABL321 - 7 2026-06-24
ABL371 - 6 2026-07-04
ABL337 - 6 2026-07-15
ABL8135 - 5 2026-07-14
ABL773 Air Busan 5 2026-05-30
ABL372 - 5 2026-07-04
ABL795 Air Busan 4 2026-06-05
ABL781 - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 ABL337 - Jul 15, 01:15 UTCJul 15, 01:30 UTC15m
2026-07-14 ABL8803 GMP → PUS Jul 14, 22:40 UTCJul 14, 23:25 UTC44m
2026-07-14 ABL8012 - Jul 14, 10:50 UTCJul 14, 11:30 UTC40m
2026-07-14 ABL8135 - Jul 14, 09:00 UTCJul 14, 09:20 UTC20m
2026-07-14 ABL181 - Jul 14, 04:25 UTCJul 14, 06:35 UTC2h 10m
2026-07-14 ABL182 PUS → CTS Jul 14, 00:50 UTCJul 14, 03:05 UTC2h 15m
2026-07-13 ABL602 - Jul 13, 23:05 UTCJul 13, 23:25 UTC20m
2026-07-13 ABL601 - Jul 13, 08:25 UTCJul 13, 22:15 UTC13h 50m
2026-07-13 ABL1635 - Jul 13, 03:10 UTCJul 13, 04:30 UTC1h 20m
2026-07-13 ABL1645 - Jul 13, 00:25 UTCJul 13, 01:40 UTC1h 15m
2026-07-12 ABL602 - Jul 12, 09:30 UTCJul 12, 22:50 UTC13h 20m
2026-07-12 ABL601 - Jul 12, 08:20 UTCJul 12, 08:40 UTC20m
2026-07-12 ABL181 - Jul 12, 03:50 UTCJul 12, 05:50 UTC2h 0m
2026-07-12 ABL182 PUS → CTS Jul 12, 00:15 UTCJul 12, 02:40 UTC2h 25m
2026-07-11 ABL726 - Jul 11, 20:45 UTCJul 11, 21:10 UTC25m
2026-07-11 ABL726 - Jul 11, 18:30 UTCJul 11, 19:45 UTC1h 15m
2026-07-11 ABL726 - Jul 11, 16:20 UTCJul 11, 16:35 UTC15m
2026-07-11 ABL725 - Jul 11, 09:50 UTCJul 11, 13:25 UTC3h 35m
2026-07-11 ABL8817 GMP → PUS Jul 11, 05:40 UTCJul 11, 06:25 UTC45m
2026-07-11 ABL8808 PUS → GMP Jul 11, 03:50 UTCJul 11, 04:25 UTC35m
2026-07-11 ABL8809 GMP → PUS Jul 11, 01:50 UTCJul 11, 02:30 UTC40m
2026-07-11 ABL8804 PUS → GMP Jul 11, 00:00 UTCJul 11, 00:45 UTC45m
2026-07-10 ABL726 - Jul 10, 21:15 UTCJul 10, 21:40 UTC25m
2026-07-10 ABL726 - Jul 10, 16:25 UTCJul 10, 19:05 UTC2h 40m
2026-07-10 ABL725 - Jul 10, 09:45 UTCJul 10, 14:45 UTC5h 0m
2026-07-10 ABL8110 - Jul 10, 07:45 UTCJul 10, 08:00 UTC15m
2026-07-10 ABL8111 - Jul 10, 05:50 UTCJul 10, 06:10 UTC20m
2026-07-10 ABL1635 - Jul 10, 03:10 UTCJul 10, 04:35 UTC1h 25m
2026-07-10 ABL1645 - Jul 10, 00:20 UTCJul 10, 01:40 UTC1h 20m
2026-07-09 ABL794 - Jul 9, 07:10 UTCJul 9, 07:45 UTC35m
2026-07-09 ABL794 - Jul 9, 05:45 UTCJul 9, 06:10 UTC25m
2026-07-09 ABL793 PUS → TPE Jul 9, 02:10 UTCJul 9, 04:10 UTC2h 0m
2026-07-09 ABL726 - Jul 9, 00:10 UTCJul 9, 00:25 UTC15m
2026-07-08 ABL726 - Jul 8, 19:35 UTCJul 8, 23:00 UTC3h 25m
2026-07-08 ABL725 - Jul 8, 17:25 UTCJul 8, 17:50 UTC25m
2026-07-08 ABL725 - Jul 8, 09:20 UTCJul 8, 15:15 UTC5h 55m
2026-07-08 ABL337 PUS → PUS Jul 8, 01:20 UTCJul 8, 07:10 UTC5h 50m
2026-07-07 ABL8803 GMP → PUS Jul 7, 22:35 UTCJul 7, 23:35 UTC1h 0m
2026-07-07 ABL8012 - Jul 7, 11:00 UTCJul 7, 11:45 UTC45m
2026-07-07 ABL8135 - Jul 7, 08:55 UTCJul 7, 09:15 UTC20m
2026-07-07 ABL181 - Jul 7, 04:00 UTCJul 7, 06:20 UTC2h 20m
2026-07-07 ABL182 - Jul 7, 00:30 UTCJul 7, 02:40 UTC2h 10m
2026-07-06 ABL602 - Jul 6, 22:20 UTCJul 6, 22:40 UTC20m
2026-07-06 ABL601 - Jul 6, 08:10 UTCJul 6, 21:30 UTC13h 20m
2026-07-06 ABL1635 - Jul 6, 03:15 UTCJul 6, 04:40 UTC1h 25m
2026-07-06 ABL1645 - Jul 6, 00:20 UTCJul 6, 01:30 UTC1h 10m
2026-07-05 ABL602 - Jul 5, 09:25 UTCJul 5, 22:55 UTC13h 30m
2026-07-05 ABL601 - Jul 5, 08:15 UTCJul 5, 08:30 UTC15m
2026-07-05 ABL181 - Jul 5, 03:55 UTCJul 5, 06:20 UTC2h 25m
2026-07-05 ABL182 - Jul 5, 00:15 UTCJul 5, 02:20 UTC2h 5m

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 HL8366 page for operator, model, and routing details .

Mode-S 71C366 frequently asked

What is Mode-S code 71C366?
71C366 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8366.
Where is Mode-S 71C366 registered?
Mode-S code 71C366 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 71C366 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 71C366, octal 34341546, decimal 7,455,590.
What flights does 71C366 operate?
Mode-S 71C366 has broadcast 20 distinct callsigns, including ABL602, ABL601, ABL726, ABL725, ABL181.