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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
Broadcasting now · callsign PTA501 · 5,650 ft
Flights observed
158
Distinct callsigns
8
Country
KR
Last broadcast
32m ago

Current position

71C709 is currently broadcasting. Map zoomed to live position.

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 8 distinct

Callsign Airline Flights Last seen
PTA502 Ptarmigan Airways 46 2026-05-29
PTA501 Ptarmigan Airways 44 2026-05-30
PTA201 Ptarmigan Airways 37 2026-05-29
PTA202 Ptarmigan Airways 17 2026-05-27
PTA504 Ptarmigan Airways 7 2026-05-19
PTA503 Ptarmigan Airways 5 2026-05-19
PTA512 Ptarmigan Airways 1 2026-05-26
PTA511 Ptarmigan Airways 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 PTA501 ICN → NRT May 30, 01:15 UTCMay 30, 02:15 UTC1h 0m
2026-05-29 PTA201 ICN → DAD May 29, 09:50 UTCMay 29, 19:50 UTC10h 0m
2026-05-29 PTA502 NRT → ICN May 29, 05:15 UTCMay 29, 07:25 UTC2h 10m
2026-05-29 PTA501 ICN → NRT May 29, 01:20 UTCMay 29, 03:10 UTC1h 50m
2026-05-28 PTA201 ICN → DAD May 28, 09:55 UTCMay 28, 20:05 UTC10h 10m
2026-05-28 PTA502 NRT → ICN May 28, 05:05 UTCMay 28, 07:05 UTC2h 0m
2026-05-28 PTA501 ICN → NRT May 28, 01:25 UTCMay 28, 03:10 UTC1h 45m
2026-05-27 PTA202 DAD → ICN May 27, 09:55 UTCMay 27, 20:05 UTC10h 10m
2026-05-27 PTA502 NRT → ICN May 27, 04:55 UTCMay 27, 07:05 UTC2h 10m
2026-05-27 PTA501 ICN → NRT May 27, 01:19 UTCMay 27, 03:14 UTC1h 55m
2026-05-26 PTA512 KIX → ICN May 26, 06:54 UTCMay 26, 08:19 UTC1h 25m
2026-05-26 PTA511 ICN → KIX May 26, 02:39 UTCMay 26, 04:00 UTC1h 20m
2026-05-25 PTA202 DAD → ICN May 25, 10:05 UTCMay 25, 19:50 UTC9h 45m
2026-05-25 PTA502 NRT → ICN May 25, 04:55 UTCMay 25, 06:50 UTC1h 55m
2026-05-25 PTA501 ICN → NRT May 25, 01:55 UTCMay 25, 03:05 UTC1h 10m
2026-05-24 PTA202 DAD → ICN May 24, 09:55 UTCMay 24, 20:10 UTC10h 15m
2026-05-24 PTA502 NRT → ICN May 24, 04:45 UTCMay 24, 06:50 UTC2h 5m
2026-05-24 PTA501 ICN → NRT May 24, 01:10 UTCMay 24, 03:00 UTC1h 50m
2026-05-23 PTA202 DAD → ICN May 23, 09:55 UTCMay 23, 19:50 UTC9h 55m
2026-05-23 PTA502 NRT → ICN May 23, 04:50 UTCMay 23, 06:45 UTC1h 55m
2026-05-23 PTA501 ICN → NRT May 23, 01:10 UTCMay 23, 03:05 UTC1h 54m
2026-05-22 PTA201 ICN → DAD May 22, 09:50 UTCMay 22, 19:50 UTC10h 0m
2026-05-22 PTA502 NRT → ICN May 22, 05:00 UTCMay 22, 07:00 UTC2h 0m
2026-05-22 PTA501 ICN → NRT May 22, 01:15 UTCMay 22, 03:15 UTC2h 0m
2026-05-21 PTA202 DAD → ICN May 21, 09:55 UTCMay 21, 20:05 UTC10h 10m
2026-05-21 PTA502 NRT → ICN May 21, 05:10 UTCMay 21, 07:15 UTC2h 5m
2026-05-21 PTA501 ICN → NRT May 21, 01:15 UTCMay 21, 03:10 UTC1h 55m
2026-05-20 PTA201 ICN → DAD May 20, 09:55 UTCMay 20, 20:00 UTC10h 5m
2026-05-20 PTA502 NRT → ICN May 20, 05:10 UTCMay 20, 07:20 UTC2h 10m
2026-05-20 PTA501 ICN → NRT May 20, 01:20 UTCMay 20, 03:10 UTC1h 50m
2026-05-19 PTA504 NRT → ICN May 19, 06:40 UTCMay 19, 08:35 UTC1h 55m
2026-05-19 PTA503 ICN → NRT May 19, 02:40 UTCMay 19, 04:35 UTC1h 55m
2026-05-18 PTA202 DAD → ICN May 18, 09:55 UTCMay 18, 20:00 UTC10h 4m
2026-05-18 PTA502 NRT → ICN May 18, 04:55 UTCMay 18, 06:45 UTC1h 50m
2026-05-18 PTA501 ICN → NRT May 18, 01:15 UTCMay 18, 03:10 UTC1h 55m
2026-05-17 PTA202 DAD → ICN May 17, 10:50 UTCMay 17, 21:05 UTC10h 15m
2026-05-17 PTA502 NRT → ICN May 17, 04:50 UTCMay 17, 06:40 UTC1h 50m
2026-05-17 PTA501 ICN → NRT May 17, 01:10 UTCMay 17, 03:20 UTC2h 10m
2026-05-16 PTA202 DAD → ICN May 16, 09:56 UTCMay 16, 19:55 UTC10h 0m
2026-05-16 PTA502 NRT → ICN May 16, 05:05 UTCMay 16, 06:50 UTC1h 46m
2026-05-16 PTA501 ICN → NRT May 16, 01:10 UTCMay 16, 03:20 UTC2h 10m
2026-05-15 PTA201 ICN → DAD May 15, 09:45 UTCMay 15, 19:50 UTC10h 4m
2026-05-15 PTA502 NRT → ICN May 15, 05:10 UTCMay 15, 06:50 UTC1h 40m
2026-05-15 PTA501 ICN → NRT May 15, 01:15 UTCMay 15, 03:35 UTC2h 20m
2026-05-14 PTA201 ICN → DAD May 14, 09:55 UTCMay 14, 19:50 UTC9h 55m
2026-05-14 PTA502 NRT → ICN May 14, 04:50 UTCMay 14, 06:40 UTC1h 50m
2026-05-14 PTA501 ICN → NRT May 14, 01:20 UTCMay 14, 03:20 UTC2h 0m
2026-05-13 PTA201 ICN → DAD May 13, 10:10 UTCMay 13, 20:25 UTC10h 15m
2026-05-13 PTA502 NRT → ICN May 13, 05:10 UTCMay 13, 07:05 UTC1h 55m
2026-05-13 PTA501 ICN → NRT May 13, 01:20 UTCMay 13, 03:20 UTC2h 0m

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?
Yes. Mode-S 71C709 is currently airborne.
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 8 distinct callsigns, including PTA502, PTA501, PTA201, PTA202, PTA504.