Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 31m ago
Flights observed
488
Distinct callsigns
15
Country
KR
Last broadcast
31m ago

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
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
PTA512 - 43 2026-07-14
PTA511 - 43 2026-07-14
PTA205 - 21 2026-07-12
PTA206 - 5 2026-07-11
WE6501 - 1 2026-04-16
PTA602P Ptarmigan Airways 1 2026-05-29
PTA601P Ptarmigan Airways 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 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
2026-07-07 PTA511 ICN → KIX Jul 7, 02:20 UTCJul 7, 03:40 UTC1h 20m
2026-07-06 PTA512 KIX → ICN Jul 6, 06:25 UTCJul 6, 08:00 UTC1h 35m
2026-07-06 PTA511 ICN → KIX Jul 6, 02:35 UTCJul 6, 04:00 UTC1h 25m
2026-07-05 PTA205 ICN → ICN Jul 5, 09:55 UTCJul 5, 21:05 UTC11h 10m
2026-07-05 PTA512 - Jul 5, 06:30 UTCJul 5, 07:55 UTC1h 25m
2026-07-05 PTA511 ICN → KIX Jul 5, 02:35 UTCJul 5, 04:00 UTC1h 25m
2026-07-04 PTA205 ICN → ICN Jul 4, 09:55 UTCJul 4, 21:05 UTC11h 10m
2026-07-04 PTA512 KIX → ICN Jul 4, 06:25 UTCJul 4, 07:45 UTC1h 20m
2026-07-04 PTA511 ICN → KIX Jul 4, 02:40 UTCJul 4, 04:00 UTC1h 20m
2026-07-03 PTA512 - Jul 3, 06:35 UTCJul 3, 07:55 UTC1h 20m
2026-07-03 PTA511 ICN → KIX Jul 3, 02:20 UTCJul 3, 04:05 UTC1h 45m
2026-07-02 PTA205 ICN → ICN Jul 2, 09:55 UTCJul 2, 21:15 UTC11h 20m
2026-07-02 PTA512 KIX → ICN Jul 2, 06:25 UTCJul 2, 07:45 UTC1h 20m
2026-07-02 PTA511 ICN → KIX Jul 2, 02:20 UTCJul 2, 03:50 UTC1h 30m
2026-07-01 PTA205 - Jul 1, 10:05 UTCJul 1, 21:30 UTC11h 25m
2026-07-01 PTA512 - Jul 1, 06:25 UTCJul 1, 07:45 UTC1h 20m
2026-07-01 PTA511 ICN → KIX Jul 1, 02:20 UTCJul 1, 03:45 UTC1h 25m
2026-06-30 PTA512 KIX → ICN Jun 30, 06:20 UTCJun 30, 07:45 UTC1h 25m
2026-06-30 PTA511 ICN → KIX Jun 30, 02:20 UTCJun 30, 03:40 UTC1h 20m
2026-06-29 PTA512 KIX → ICN Jun 29, 06:14 UTCJun 29, 07:34 UTC1h 20m
2026-06-29 PTA511 ICN → KIX Jun 29, 02:20 UTCJun 29, 03:39 UTC1h 20m
2026-06-28 PTA205 ICN → ICN Jun 28, 10:00 UTCJun 28, 21:10 UTC11h 10m
2026-06-28 PTA512 KIX → ICN Jun 28, 06:20 UTCJun 28, 07:40 UTC1h 20m
2026-06-28 PTA511 ICN → KIX Jun 28, 02:20 UTCJun 28, 03:45 UTC1h 25m
2026-06-27 PTA205 - Jun 27, 10:10 UTCJun 27, 20:59 UTC10h 50m
2026-06-27 PTA512 - Jun 27, 06:25 UTCJun 27, 07:39 UTC1h 15m
2026-06-27 PTA511 ICN → KIX Jun 27, 03:04 UTCJun 27, 04:34 UTC1h 30m
2026-06-26 PTA512 - Jun 26, 07:00 UTCJun 26, 08:20 UTC1h 20m
2026-06-26 PTA511 - Jun 26, 02:40 UTCJun 26, 04:00 UTC1h 20m
2026-06-25 PTA205 ICN → ICN Jun 25, 09:55 UTCJun 25, 21:05 UTC11h 10m
2026-06-25 PTA512 - Jun 25, 06:20 UTCJun 25, 07:45 UTC1h 25m

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 31m ago.
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 PTA6502, PTA6504, PTA6704, PTA6503, PTA6703.