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sensors Mode-S transponder

71C709

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

Currently assigned to HL8709 · AIRBUS A-330-200

Hex
71C709
Octal
34343411
Decimal
7,456,521
Country
KR
Tail
HL8709
Type
A332
Transponder active on ground
Flights observed
281
Distinct callsigns
12
Country
KR
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 71C709.

Country allocation

The ICAO 24-bit address 71C709 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 12 distinct

Callsign Airline Flights Last seen
PTA502 - 83 2026-07-14
PTA501 - 80 2026-07-14
PTA201 - 54 2026-07-08
PTA202 - 34 2026-07-12
PTA504 - 11 2026-06-30
PTA503 - 9 2026-06-30
PTA532 - 2 2026-07-13
PTA531 - 2 2026-07-13
PTA272 - 2 2026-07-13
PTA271 - 2 2026-07-13
PTA512 Ptarmigan Airways 1 2026-05-26
PTA511 Ptarmigan Airways 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PTA502 NRT → ICN Jul 14, 04:50 UTCJul 14, 06:50 UTC2h 0m
2026-07-14 PTA501 ICN → NRT Jul 14, 01:25 UTCJul 14, 03:20 UTC1h 55m
2026-07-13 PTA272 - Jul 13, 20:50 UTCJul 13, 21:35 UTC45m
2026-07-13 PTA272 - Jul 13, 17:40 UTCJul 13, 17:50 UTC10m
2026-07-13 PTA271 - Jul 13, 14:45 UTCJul 13, 15:10 UTC25m
2026-07-13 PTA271 - Jul 13, 11:20 UTCJul 13, 12:00 UTC40m
2026-07-13 PTA532 CTS → ICN Jul 13, 06:25 UTCJul 13, 08:45 UTC2h 20m
2026-07-13 PTA531 - Jul 13, 02:25 UTCJul 13, 04:50 UTC2h 25m
2026-07-12 PTA202 ICN → ICN Jul 12, 10:05 UTCJul 12, 19:55 UTC9h 50m
2026-07-12 PTA502 NRT → ICN Jul 12, 04:45 UTCJul 12, 06:40 UTC1h 55m
2026-07-12 PTA501 ICN → NRT Jul 12, 01:15 UTCJul 12, 03:10 UTC1h 55m
2026-07-11 PTA202 ICN → ICN Jul 11, 10:20 UTCJul 11, 20:00 UTC9h 40m
2026-07-11 PTA502 NRT → ICN Jul 11, 04:50 UTCJul 11, 06:40 UTC1h 50m
2026-07-11 PTA501 ICN → NRT Jul 11, 01:05 UTCJul 11, 03:01 UTC1h 55m
2026-07-10 PTA502 NRT → ICN Jul 10, 05:00 UTCJul 10, 07:05 UTC2h 5m
2026-07-10 PTA501 ICN → NRT Jul 10, 01:10 UTCJul 10, 03:15 UTC2h 5m
2026-07-09 PTA202 ICN → ICN Jul 9, 09:55 UTCJul 9, 19:50 UTC9h 55m
2026-07-09 PTA502 NRT → ICN Jul 9, 05:35 UTCJul 9, 07:35 UTC2h 0m
2026-07-09 PTA501 ICN → NRT Jul 9, 01:15 UTCJul 9, 03:15 UTC2h 0m
2026-07-08 PTA201 ICN → ICN Jul 8, 09:55 UTCJul 8, 19:55 UTC10h 0m
2026-07-08 PTA502 NRT → ICN Jul 8, 04:50 UTCJul 8, 06:55 UTC2h 5m
2026-07-08 PTA501 ICN → NRT Jul 8, 01:15 UTCJul 8, 03:05 UTC1h 50m
2026-07-07 PTA532 - Jul 7, 06:15 UTCJul 7, 08:40 UTC2h 25m
2026-07-07 PTA531 - Jul 7, 02:25 UTCJul 7, 04:40 UTC2h 15m
2026-07-06 PTA502 NRT → ICN Jul 6, 04:55 UTCJul 6, 07:00 UTC2h 5m
2026-07-06 PTA501 ICN → NRT Jul 6, 01:10 UTCJul 6, 03:05 UTC1h 55m
2026-07-05 PTA202 ICN → ICN Jul 5, 10:35 UTCJul 5, 20:30 UTC9h 55m
2026-07-05 PTA502 NRT → ICN Jul 5, 05:30 UTCJul 5, 07:40 UTC2h 10m
2026-07-05 PTA501 ICN → NRT Jul 5, 01:25 UTCJul 5, 03:20 UTC1h 55m
2026-07-04 PTA202 ICN → ICN Jul 4, 09:50 UTCJul 4, 19:55 UTC10h 5m
2026-07-04 PTA502 NRT → ICN Jul 4, 04:50 UTCJul 4, 06:50 UTC2h 0m
2026-07-04 PTA501 ICN → NRT Jul 4, 01:10 UTCJul 4, 03:00 UTC1h 50m
2026-07-03 PTA502 NRT → ICN Jul 3, 04:50 UTCJul 3, 06:55 UTC2h 5m
2026-07-03 PTA501 - Jul 3, 01:10 UTCJul 3, 03:05 UTC1h 55m
2026-07-02 PTA202 ICN → ICN Jul 2, 09:55 UTCJul 2, 20:25 UTC10h 30m
2026-07-02 PTA502 NRT → ICN Jul 2, 04:55 UTCJul 2, 07:05 UTC2h 10m
2026-07-02 PTA501 ICN → NRT Jul 2, 01:05 UTCJul 2, 02:55 UTC1h 50m
2026-07-01 PTA201 ICN → ICN Jul 1, 09:55 UTCJul 1, 20:05 UTC10h 10m
2026-06-30 PTA504 NRT → ICN Jun 30, 06:40 UTCJun 30, 08:50 UTC2h 10m
2026-06-30 PTA503 - Jun 30, 02:35 UTCJun 30, 04:20 UTC1h 45m
2026-06-29 PTA502 NRT → ICN Jun 29, 05:00 UTCJun 29, 06:59 UTC2h 0m
2026-06-29 PTA501 ICN → NRT Jun 29, 01:10 UTCJun 29, 02:59 UTC1h 50m
2026-06-28 PTA202 ICN → ICN Jun 28, 09:50 UTCJun 28, 20:14 UTC10h 25m
2026-06-28 PTA502 NRT → ICN Jun 28, 04:50 UTCJun 28, 06:55 UTC2h 5m
2026-06-28 PTA501 ICN → NRT Jun 28, 01:10 UTCJun 28, 02:54 UTC1h 45m
2026-06-27 PTA201 ICN → ICN Jun 27, 10:00 UTCJun 27, 19:49 UTC9h 50m
2026-06-27 PTA502 NRT → ICN Jun 27, 04:59 UTCJun 27, 06:54 UTC1h 55m
2026-06-27 PTA501 - Jun 27, 01:09 UTCJun 27, 03:04 UTC1h 55m
2026-06-26 PTA502 NRT → ICN Jun 26, 05:19 UTCJun 26, 07:24 UTC2h 5m
2026-06-26 PTA501 ICN → NRT Jun 26, 01:15 UTCJun 26, 03:10 UTC1h 55m

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 HL8709 page for operator, model, and routing details .

Mode-S 71C709 frequently asked

What is Mode-S code 71C709?
71C709 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8709.
Where is Mode-S 71C709 registered?
Mode-S code 71C709 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 71C709 broadcasting right now?
Mode-S 71C709 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C709, octal 34343411, decimal 7,456,521.
What flights does 71C709 operate?
Mode-S 71C709 has broadcast 12 distinct callsigns, including PTA502, PTA501, PTA201, PTA202, PTA504.