Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C309

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

Currently assigned to HL8309 · AIRBUS A-320

Hex
71C309
Octal
34341411
Decimal
7,455,497
Country
KR
Tail
HL8309
Type
A320
No current signal · last broadcast 2h ago
Flights observed
366
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 71C309.

Country allocation

The ICAO 24-bit address 71C309 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
ABL8019 - 16 2026-07-11
ABL8818 - 15 2026-07-11
ABL8809 - 15 2026-07-04
ABL8804 - 15 2026-07-04
ABL8817 - 13 2026-07-04
ABL8808 - 13 2026-07-04
ABL8024 - 13 2026-07-11
ABL8821 - 11 2026-07-12
ABL134 - 11 2026-07-03
ABL133 - 11 2026-07-03
ABL8827 - 10 2026-07-12
ABL8822 - 10 2026-07-12
ABL8816 - 10 2026-07-12
ABL8013 - 10 2026-07-04
ABL321 - 10 2026-07-06
ABL8813 - 9 2026-07-10
ABL8806 - 9 2026-07-10
ABL8807 - 8 2026-07-10
ABL8133 - 7 2026-07-13
ABL773 Air Busan 7 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ABL8182 - Jul 14, 05:15 UTCJul 14, 05:35 UTC20m
2026-07-14 ABL8183 - Jul 14, 02:55 UTCJul 14, 03:15 UTC20m
2026-07-14 ABL8136 - Jul 14, 01:35 UTCJul 14, 01:55 UTC20m
2026-07-13 ABL8133 - Jul 13, 23:15 UTCJul 13, 23:35 UTC20m
2026-07-13 ABL8823 GMP → PUS Jul 13, 09:55 UTCJul 13, 10:40 UTC45m
2026-07-13 ABL8820 PUS → GMP Jul 13, 08:20 UTCJul 13, 09:05 UTC45m
2026-07-13 ABL8819 GMP → PUS Jul 13, 06:35 UTCJul 13, 07:20 UTC45m
2026-07-13 ABL8812 PUS → GMP Jul 13, 05:01 UTCJul 13, 05:45 UTC45m
2026-07-13 ABL123 KIX → PUS Jul 13, 02:20 UTCJul 13, 03:30 UTC1h 10m
2026-07-12 ABL124 PUS → KIX Jul 12, 23:55 UTCJul 13, 01:01 UTC1h 5m
2026-07-12 ABL8827 GMP → PUS Jul 12, 11:40 UTCJul 12, 12:20 UTC40m
2026-07-12 ABL8822 PUS → GMP Jul 12, 09:55 UTCJul 12, 10:35 UTC40m
2026-07-12 ABL8821 - Jul 12, 08:15 UTCJul 12, 09:00 UTC45m
2026-07-12 ABL8816 PUS → GMP Jul 12, 06:25 UTCJul 12, 07:10 UTC45m
2026-07-12 ABL801F GMP → PUS Jul 12, 00:15 UTCJul 12, 00:55 UTC40m
2026-07-11 ABL8024 - Jul 11, 12:20 UTCJul 11, 12:55 UTC35m
2026-07-11 ABL8019 - Jul 11, 09:10 UTCJul 11, 09:50 UTC40m
2026-07-11 ABL8818 PUS → GMP Jul 11, 07:25 UTCJul 11, 08:05 UTC40m
2026-07-11 ABL8182 - Jul 11, 05:01 UTCJul 11, 05:25 UTC25m
2026-07-11 ABL8183 - Jul 11, 02:45 UTCJul 11, 03:05 UTC20m
2026-07-11 ABL8136 - Jul 11, 01:20 UTCJul 11, 01:40 UTC20m
2026-07-10 ABL8133 - Jul 10, 23:00 UTCJul 10, 23:20 UTC20m
2026-07-10 ABL8114 - Jul 10, 11:10 UTCJul 10, 11:25 UTC15m
2026-07-10 ABL8305 - Jul 10, 09:10 UTCJul 10, 09:25 UTC15m
2026-07-10 ABL8304 - Jul 10, 07:45 UTCJul 10, 08:05 UTC20m
2026-07-10 ABL8115 - Jul 10, 05:55 UTCJul 10, 06:15 UTC20m
2026-07-10 ABL8813 GMP → PUS Jul 10, 04:00 UTCJul 10, 04:55 UTC55m
2026-07-10 ABL8806 PUS → GMP Jul 10, 02:05 UTCJul 10, 02:50 UTC45m
2026-07-10 ABL8807 GMP → PUS Jul 10, 00:20 UTCJul 10, 01:05 UTC45m
2026-07-09 ABL8802 PUS → GMP Jul 9, 22:30 UTCJul 9, 23:15 UTC45m
2026-07-09 ABL8138 - Jul 9, 11:30 UTCJul 9, 12:10 UTC40m
2026-07-09 ABL8139 - Jul 9, 09:45 UTCJul 9, 10:00 UTC15m
2026-07-09 ABL8112 - Jul 9, 08:35 UTCJul 9, 08:55 UTC20m
2026-07-09 ABL8113 - Jul 9, 06:45 UTCJul 9, 07:05 UTC20m
2026-07-09 ABL8182 - Jul 9, 05:10 UTCJul 9, 05:30 UTC20m
2026-07-09 ABL8183 - Jul 9, 03:05 UTCJul 9, 03:25 UTC20m
2026-07-09 ABL8136 - Jul 9, 01:35 UTCJul 9, 01:55 UTC20m
2026-07-08 ABL8133 - Jul 8, 23:20 UTCJul 8, 23:40 UTC20m
2026-07-08 ABL8138 - Jul 8, 11:20 UTCJul 8, 11:45 UTC25m
2026-07-08 ABL8305 - Jul 8, 09:10 UTCJul 8, 09:30 UTC20m
2026-07-08 ABL8304 - Jul 8, 07:55 UTCJul 8, 08:15 UTC20m
2026-07-08 ABL8115 - Jul 8, 05:45 UTCJul 8, 06:05 UTC20m
2026-07-08 ABL8813 GMP → PUS Jul 8, 04:00 UTCJul 8, 04:45 UTC45m
2026-07-08 ABL8806 PUS → GMP Jul 8, 02:10 UTCJul 8, 03:00 UTC50m
2026-07-08 ABL8807 GMP → PUS Jul 8, 00:20 UTCJul 8, 01:05 UTC45m
2026-07-07 ABL8802 PUS → GMP Jul 7, 22:35 UTCJul 7, 23:25 UTC50m
2026-07-07 ABL8823 GMP → PUS Jul 7, 09:50 UTCJul 7, 10:30 UTC40m
2026-07-07 ABL8820 PUS → GMP Jul 7, 08:15 UTCJul 7, 08:50 UTC35m
2026-07-07 ABL8819 GMP → PUS Jul 7, 06:35 UTCJul 7, 07:25 UTC50m
2026-07-07 ABL8812 PUS → GMP Jul 7, 04:50 UTCJul 7, 05:30 UTC40m

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 HL8309 page for operator, model, and routing details .

Mode-S 71C309 frequently asked

What is Mode-S code 71C309?
71C309 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8309.
Where is Mode-S 71C309 registered?
Mode-S code 71C309 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 71C309 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C309, octal 34341411, decimal 7,455,497.
What flights does 71C309 operate?
Mode-S 71C309 has broadcast 20 distinct callsigns, including ABL8019, ABL8818, ABL8809, ABL8804, ABL8817.