Apparatus

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sensors Mode-S transponder

71C741

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

Currently assigned to HL8741 · AIRBUS A-320

Hex
71C741
Octal
34343501
Decimal
7,456,577
Country
KR
Tail
HL8741
Type
A320
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
519
Distinct callsigns
15
Country
KR
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S 71C741.

Country allocation

The ICAO 24-bit address 71C741 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 15 distinct

Callsign Airline Flights Last seen
PTA511 Ptarmigan Airways 55 2026-07-26
PTA512 Ptarmigan Airways 54 2026-07-26
PTA6502 Ptarmigan Airways 50 2026-05-29
PTA6504 Ptarmigan Airways 49 2026-05-29
PTA6704 Ptarmigan Airways 47 2026-05-29
PTA6503 Ptarmigan Airways 47 2026-05-29
PTA6703 Ptarmigan Airways 46 2026-05-29
PTA6501 Ptarmigan Airways 46 2026-05-28
PTA6702 Ptarmigan Airways 44 2026-05-28
PTA6701 Ptarmigan Airways 43 2026-05-29
PTA205 Ptarmigan Airways 27 2026-07-26
PTA206 Ptarmigan Airways 7 2026-07-22
WE6501 - 1 2026-04-16
PTA602P Ptarmigan Airways 1 2026-05-29
PTA601P Ptarmigan Airways 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PTA205 ICN → CXR Jul 26, 09:55 UTCJul 26, 20:55 UTC11h 0m
2026-07-26 PTA512 KIX → ICN Jul 26, 06:20 UTCJul 26, 07:35 UTC1h 16m
2026-07-26 PTA511 ICN → KIX Jul 26, 02:35 UTCJul 26, 03:55 UTC1h 20m
2026-07-25 PTA205 ICN → CXR Jul 25, 10:05 UTCJul 25, 21:10 UTC11h 5m
2026-07-25 PTA512 KIX → ICN Jul 25, 06:25 UTCJul 25, 07:45 UTC1h 20m
2026-07-25 PTA511 ICN → KIX Jul 25, 02:35 UTCJul 25, 04:10 UTC1h 35m
2026-07-24 PTA512 KIX → ICN Jul 24, 06:20 UTCJul 24, 07:40 UTC1h 20m
2026-07-24 PTA511 ICN → KIX Jul 24, 02:30 UTCJul 24, 04:05 UTC1h 35m
2026-07-23 PTA205 - Jul 23, 09:55 UTCJul 23, 20:55 UTC11h 0m
2026-07-23 PTA512 KIX → ICN Jul 23, 06:20 UTCJul 23, 07:45 UTC1h 25m
2026-07-23 PTA511 ICN → KIX Jul 23, 02:20 UTCJul 23, 03:40 UTC1h 20m
2026-07-22 PTA206 CXR → ICN Jul 22, 11:50 UTCJul 22, 21:05 UTC9h 15m
2026-07-22 PTA511 ICN → KIX Jul 22, 02:45 UTCJul 22, 04:10 UTC1h 25m
2026-07-21 PTA512 KIX → ICN Jul 21, 06:20 UTCJul 21, 07:45 UTC1h 25m
2026-07-21 PTA511 ICN → KIX Jul 21, 02:30 UTCJul 21, 04:00 UTC1h 30m
2026-07-20 PTA512 KIX → ICN Jul 20, 06:25 UTCJul 20, 07:50 UTC1h 25m
2026-07-20 PTA511 ICN → KIX Jul 20, 02:35 UTCJul 20, 04:15 UTC1h 40m
2026-07-19 PTA205 ICN → ICN Jul 19, 09:55 UTCJul 19, 21:05 UTC11h 10m
2026-07-19 PTA512 KIX → ICN Jul 19, 06:30 UTCJul 19, 07:50 UTC1h 20m
2026-07-19 PTA511 ICN → KIX Jul 19, 02:25 UTCJul 19, 04:00 UTC1h 35m
2026-07-18 PTA206 ICN → ICN Jul 18, 09:55 UTCJul 18, 21:20 UTC11h 25m
2026-07-18 PTA512 KIX → ICN Jul 18, 06:30 UTCJul 18, 07:50 UTC1h 20m
2026-07-18 PTA511 ICN → KIX Jul 18, 02:29 UTCJul 18, 04:00 UTC1h 31m
2026-07-17 PTA512 KIX → ICN Jul 17, 06:29 UTCJul 17, 07:50 UTC1h 20m
2026-07-17 PTA511 ICN → KIX Jul 17, 02:30 UTCJul 17, 03:50 UTC1h 20m
2026-07-16 PTA205 ICN → ICN Jul 16, 09:55 UTCJul 16, 21:05 UTC11h 10m
2026-07-16 PTA512 KIX → ICN Jul 16, 06:40 UTCJul 16, 08:00 UTC1h 20m
2026-07-16 PTA511 ICN → KIX Jul 16, 02:25 UTCJul 16, 03:45 UTC1h 20m
2026-07-15 PTA205 ICN → ICN Jul 15, 10:05 UTCJul 15, 20:50 UTC10h 45m
2026-07-15 PTA512 KIX → ICN Jul 15, 06:20 UTCJul 15, 07:40 UTC1h 20m
2026-07-15 PTA511 - Jul 15, 02:20 UTCJul 15, 03:45 UTC1h 25m
2026-07-14 PTA512 KIX → ICN Jul 14, 06:20 UTCJul 14, 07:45 UTC1h 25m
2026-07-14 PTA511 ICN → KIX Jul 14, 02:20 UTCJul 14, 03:40 UTC1h 20m
2026-07-13 PTA512 KIX → ICN Jul 13, 06:20 UTCJul 13, 07:40 UTC1h 20m
2026-07-13 PTA511 ICN → KIX Jul 13, 02:30 UTCJul 13, 03:50 UTC1h 20m
2026-07-12 PTA205 ICN → ICN Jul 12, 10:01 UTCJul 12, 21:05 UTC11h 5m
2026-07-12 PTA512 KIX → ICN Jul 12, 06:25 UTCJul 12, 07:50 UTC1h 25m
2026-07-12 PTA511 ICN → KIX Jul 12, 02:25 UTCJul 12, 03:45 UTC1h 20m
2026-07-11 PTA206 ICN → ICN Jul 11, 11:00 UTCJul 11, 22:20 UTC11h 20m
2026-07-11 PTA512 KIX → ICN Jul 11, 06:20 UTCJul 11, 07:40 UTC1h 20m
2026-07-11 PTA511 ICN → KIX Jul 11, 02:25 UTCJul 11, 03:55 UTC1h 30m
2026-07-10 PTA512 KIX → ICN Jul 10, 06:20 UTCJul 10, 07:45 UTC1h 25m
2026-07-10 PTA511 ICN → KIX Jul 10, 02:25 UTCJul 10, 03:55 UTC1h 30m
2026-07-09 PTA205 ICN → ICN Jul 9, 10:20 UTCJul 9, 21:00 UTC10h 40m
2026-07-09 PTA512 KIX → ICN Jul 9, 06:25 UTCJul 9, 07:45 UTC1h 20m
2026-07-09 PTA511 ICN → KIX Jul 9, 02:25 UTCJul 9, 04:00 UTC1h 35m
2026-07-08 PTA205 ICN → ICN Jul 8, 09:55 UTCJul 8, 21:00 UTC11h 5m
2026-07-08 PTA512 KIX → ICN Jul 8, 06:25 UTCJul 8, 07:50 UTC1h 25m
2026-07-08 PTA511 ICN → KIX Jul 8, 02:30 UTCJul 8, 04:00 UTC1h 30m
2026-07-07 PTA512 KIX → ICN Jul 7, 06:25 UTCJul 7, 07:45 UTC1h 20m

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 HL8741 page for operator, model, and routing details .

Mode-S 71C741 frequently asked

What is Mode-S code 71C741?
71C741 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8741.
Where is Mode-S 71C741 registered?
Mode-S code 71C741 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 71C741 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C741, octal 34343501, decimal 7,456,577.
What flights does 71C741 operate?
Mode-S 71C741 has broadcast 15 distinct callsigns, including PTA511, PTA512, PTA6502, PTA6504, PTA6704.