Apparatus

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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
No current signal · last broadcast Jul 26, 20:05 UTC
Flights observed
321
Distinct callsigns
13
Country
KR
Last broadcast
Jul 26, 20:05 UTC

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 13 distinct

Callsign Airline Flights Last seen
PTA502 Ptarmigan Airways 93 2026-07-26
PTA501 Ptarmigan Airways 91 2026-07-26
PTA201 Ptarmigan Airways 58 2026-07-26
PTA202 Ptarmigan Airways 38 2026-07-22
PTA504 - 11 2026-06-30
PTA503 - 9 2026-06-30
PTA272 Ptarmigan Airways 6 2026-07-24
PTA271 Ptarmigan Airways 6 2026-07-24
PTA532 - 3 2026-07-24
PTA531 Ptarmigan Airways 3 2026-07-24
PTA611T - 1 2026-07-19
PTA512 Ptarmigan Airways 1 2026-05-26
PTA511 Ptarmigan Airways 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PTA201 ICN → DAD Jul 26, 09:55 UTCJul 26, 20:05 UTC10h 10m
2026-07-26 PTA502 NRT → ICN Jul 26, 05:05 UTCJul 26, 07:05 UTC2h 1m
2026-07-26 PTA501 ICN → NRT Jul 26, 01:15 UTCJul 26, 03:10 UTC1h 55m
2026-07-25 PTA201 ICN → DAD Jul 25, 09:50 UTCJul 25, 20:00 UTC10h 10m
2026-07-25 PTA502 NRT → ICN Jul 25, 04:55 UTCJul 25, 06:50 UTC1h 55m
2026-07-25 PTA501 ICN → NRT Jul 25, 01:20 UTCJul 25, 03:25 UTC2h 5m
2026-07-24 PTA272 HAN → ICN Jul 24, 21:10 UTCJul 24, 22:00 UTC50m
2026-07-24 PTA272 HAN → ICN Jul 24, 17:55 UTCJul 24, 18:05 UTC10m
2026-07-24 PTA271 ICN → HAN Jul 24, 14:45 UTCJul 24, 14:55 UTC10m
2026-07-24 PTA271 ICN → HAN Jul 24, 11:15 UTCJul 24, 12:00 UTC45m
2026-07-24 PTA532 - Jul 24, 06:35 UTCJul 24, 08:55 UTC2h 20m
2026-07-24 PTA531 ICN → CTS Jul 24, 02:35 UTCJul 24, 05:00 UTC2h 25m
2026-07-23 PTA201 ICN → DAD Jul 23, 09:55 UTCJul 23, 19:55 UTC10h 0m
2026-07-23 PTA502 NRT → ICN Jul 23, 05:05 UTCJul 23, 07:05 UTC2h 0m
2026-07-23 PTA501 ICN → NRT Jul 23, 01:20 UTCJul 23, 03:20 UTC2h 0m
2026-07-22 PTA202 DAD → ICN Jul 22, 11:10 UTCJul 22, 20:30 UTC9h 20m
2026-07-22 PTA501 ICN → NRT Jul 22, 01:15 UTCJul 22, 03:10 UTC1h 55m
2026-07-21 PTA272 HAN → ICN Jul 21, 20:55 UTCJul 21, 21:40 UTC45m
2026-07-21 PTA271 ICN → HAN Jul 21, 11:20 UTCJul 21, 14:05 UTC2h 45m
2026-07-21 PTA502 NRT → ICN Jul 21, 05:00 UTCJul 21, 06:55 UTC1h 55m
2026-07-21 PTA501 ICN → NRT Jul 21, 01:20 UTCJul 21, 03:10 UTC1h 50m
2026-07-20 PTA502 NRT → ICN Jul 20, 06:10 UTCJul 20, 08:05 UTC1h 55m
2026-07-20 PTA501 ICN → NRT Jul 20, 02:30 UTCJul 20, 04:25 UTC1h 55m
2026-07-19 PTA611T ICN → ICN Jul 19, 23:15 UTCJul 20, 00:35 UTC1h 20m
2026-07-19 PTA202 ICN → ICN Jul 19, 10:00 UTCJul 19, 20:25 UTC10h 25m
2026-07-19 PTA502 NRT → ICN Jul 19, 05:05 UTCJul 19, 07:00 UTC1h 55m
2026-07-19 PTA501 ICN → NRT Jul 19, 01:25 UTCJul 19, 03:20 UTC1h 55m
2026-07-18 PTA202 ICN → ICN Jul 18, 09:55 UTCJul 18, 20:00 UTC10h 5m
2026-07-18 PTA502 NRT → ICN Jul 18, 05:00 UTCJul 18, 06:55 UTC1h 55m
2026-07-18 PTA501 ICN → NRT Jul 18, 01:15 UTCJul 18, 03:10 UTC1h 56m
2026-07-17 PTA502 NRT → ICN Jul 17, 05:10 UTCJul 17, 07:00 UTC1h 50m
2026-07-17 PTA501 ICN → NRT Jul 17, 01:29 UTCJul 17, 03:30 UTC2h 0m
2026-07-16 PTA201 ICN → ICN Jul 16, 10:00 UTCJul 16, 20:00 UTC10h 0m
2026-07-16 PTA502 NRT → ICN Jul 16, 04:50 UTCJul 16, 06:45 UTC1h 55m
2026-07-16 PTA501 ICN → NRT Jul 16, 01:15 UTCJul 16, 03:05 UTC1h 50m
2026-07-15 PTA202 ICN → ICN Jul 15, 09:50 UTCJul 15, 20:10 UTC10h 20m
2026-07-15 PTA502 NRT → ICN Jul 15, 04:55 UTCJul 15, 06:55 UTC2h 0m
2026-07-15 PTA501 ICN → NRT Jul 15, 01:15 UTCJul 15, 03:10 UTC1h 55m
2026-07-14 PTA272 - Jul 14, 17:40 UTCJul 14, 21:30 UTC3h 50m
2026-07-14 PTA271 - Jul 14, 11:20 UTCJul 14, 14:00 UTC2h 40m
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

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?
No active broadcast right now. Last signal was Jul 26, 20:05 UTC.
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 13 distinct callsigns, including PTA502, PTA501, PTA201, PTA202, PTA504.