sensors Mode-S transponder

71C734

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

Hex
71C734
Octal
34343464
Decimal
7,456,564
Country
KR
No current signal · last broadcast 2h ago
Flights observed
80
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 71C734.

Country allocation

The ICAO 24-bit address 71C734 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 20 distinct

Callsign Airline Flights Last seen
KAL053 - 11 2026-06-13
KAL705 Korean Air 10 2026-05-27
KAL706 Korean Air 9 2026-05-28
KAL054 - 7 2026-06-13
KAL072 Korean Air 5 2026-06-09
KAL071 Korean Air 5 2026-06-09
KAL724 Korean Air 4 2026-05-23
KAL723 Korean Air 4 2026-05-23
KAL076 Korean Air 4 2026-06-02
KAL075 Korean Air 4 2026-06-01
BOE281 - 4 2026-04-22
KAL928 Korean Air 2 2026-05-25
KAL704 Korean Air 2 2026-05-27
KAL703 Korean Air 2 2026-05-27
KAL927 Korean Air 1 2026-05-24
KAL882 Korean Air 1 2026-06-07
KAL752 Korean Air 1 2026-05-22
KAL751 Korean Air 1 2026-05-22
KAL100D Korean Air 1 2026-04-30
KAL042 Korean Air 1 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-13 KAL054 - Jun 13, 23:25 UTCJun 14, 07:00 UTC7h 36m
2026-06-13 KAL053 - Jun 13, 20:00 UTCJun 13, 20:10 UTC10m
2026-06-13 KAL053 - Jun 13, 12:25 UTCJun 13, 14:20 UTC1h 55m
2026-06-12 KAL054 HNL → ICN Jun 12, 23:25 UTCJun 13, 08:25 UTC8h 59m
2026-06-12 KAL053 - Jun 12, 19:45 UTCJun 12, 19:55 UTC10m
2026-06-12 KAL053 - Jun 12, 12:20 UTCJun 12, 14:05 UTC1h 45m
2026-06-11 KAL054 HNL → ICN Jun 11, 23:30 UTCJun 12, 08:35 UTC9h 5m
2026-06-11 KAL053 ICN → HNL Jun 11, 12:25 UTCJun 11, 14:05 UTC1h 40m
2026-06-10 KAL054 HNL → ICN Jun 10, 23:35 UTCJun 11, 08:35 UTC9h 0m
2026-06-10 KAL053 ICN → HNL Jun 10, 12:15 UTCJun 10, 14:00 UTC1h 45m
2026-06-09 KAL072 YVR → ICN Jun 9, 22:15 UTCJun 10, 09:20 UTC11h 5m
2026-06-09 KAL071 ICN → YVR Jun 9, 10:10 UTCJun 9, 19:45 UTC9h 35m
2026-06-08 KAL042 SEA → ICN Jun 8, 20:40 UTCJun 9, 07:50 UTC11h 10m
2026-06-08 KAL041 ICN → SEA Jun 8, 08:05 UTCJun 8, 17:15 UTC9h 10m
2026-06-07 KAL882 PVG → ICN Jun 7, 23:55 UTCJun 8, 05:00 UTC5h 5m
2026-06-06 KAL054 HNL → ICN Jun 6, 23:30 UTCJun 7, 08:55 UTC9h 25m
2026-06-06 KAL053 ICN → HNL Jun 6, 12:35 UTCJun 6, 20:19 UTC7h 45m
2026-06-05 KAL054 HNL → ICN Jun 5, 23:40 UTCJun 6, 09:04 UTC9h 25m
2026-06-05 KAL053 ICN → HNL Jun 5, 19:55 UTCJun 5, 20:10 UTC15m
2026-06-05 KAL053 ICN → HNL Jun 5, 12:25 UTCJun 5, 14:00 UTC1h 35m
2026-06-04 KAL054 HNL → ICN Jun 4, 23:35 UTCJun 5, 09:00 UTC9h 25m
2026-06-04 KAL053 ICN → HNL Jun 4, 19:40 UTCJun 4, 20:00 UTC20m
2026-06-04 KAL053 ICN → HNL Jun 4, 12:25 UTCJun 4, 14:00 UTC1h 35m
2026-06-03 KAL072 YVR → ICN Jun 3, 22:15 UTCJun 4, 08:30 UTC10h 15m
2026-06-03 KAL071 ICN → YVR Jun 3, 10:10 UTCJun 3, 19:45 UTC9h 35m
2026-06-02 KAL076 YVR → ICN Jun 2, 08:15 UTCJun 2, 18:05 UTC9h 50m
2026-06-01 KAL075 ICN → YVR Jun 1, 14:00 UTCJun 1, 23:20 UTC9h 20m
2026-05-31 KAL072 YVR → ICN May 31, 22:00 UTCJun 1, 08:20 UTC10h 20m
2026-05-31 KAL071 ICN → YVR May 31, 10:15 UTCMay 31, 19:25 UTC9h 10m
2026-05-30 KAL076 YVR → ICN May 30, 08:10 UTCMay 30, 18:55 UTC10h 45m
2026-05-29 KAL075 ICN → YVR May 29, 14:25 UTCMay 29, 23:25 UTC9h 1m
2026-05-28 KAL072 YVR → ICN May 28, 21:55 UTCMay 29, 09:05 UTC11h 10m
2026-05-28 KAL071 ICN → YVR May 28, 10:10 UTCMay 28, 19:25 UTC9h 15m
2026-05-28 KAL706 NRT → ICN May 28, 00:30 UTCMay 28, 02:30 UTC2h 0m
2026-05-27 KAL705 ICN → NRT May 27, 10:10 UTCMay 27, 11:55 UTC1h 45m
2026-05-27 KAL704 NRT → ICN May 27, 05:29 UTCMay 27, 07:30 UTC2h 1m
2026-05-27 KAL703 ICN → NRT May 27, 01:39 UTCMay 27, 03:34 UTC1h 55m
2026-05-26 KAL076 YVR → ICN May 26, 08:10 UTCMay 26, 18:40 UTC10h 30m
2026-05-25 KAL075 ICN → YVR May 25, 14:00 UTCMay 25, 23:10 UTC9h 10m
2026-05-25 KAL928 MXP → ICN May 25, 07:25 UTCMay 25, 07:50 UTC25m
2026-05-24 KAL928 MXP → ICN May 24, 20:40 UTCMay 24, 21:45 UTC1h 5m
2026-05-24 KAL927 ICN → MXP May 24, 04:50 UTCMay 24, 17:15 UTC12h 25m
2026-05-24 KAL706 NRT → ICN May 24, 00:35 UTCMay 24, 02:30 UTC1h 55m
2026-05-23 KAL705 ICN → NRT May 23, 09:55 UTCMay 23, 11:45 UTC1h 50m
2026-05-23 KAL724 KIX → ICN May 23, 04:15 UTCMay 23, 05:50 UTC1h 35m
2026-05-23 KAL723 ICN → KIX May 23, 01:10 UTCMay 23, 02:30 UTC1h 20m
2026-05-22 KAL752 NGO → ICN May 22, 17:35 UTCMay 22, 19:20 UTC1h 45m
2026-05-22 KAL751 ICN → NGO May 22, 11:55 UTCMay 22, 13:40 UTC1h 45m
2026-05-22 KAL704 NRT → ICN May 22, 05:30 UTCMay 22, 07:25 UTC1h 55m
2026-05-22 KAL703 ICN → NRT May 22, 01:35 UTCMay 22, 03:30 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.

Mode-S 71C734 frequently asked

What is Mode-S code 71C734?
71C734 is an ICAO 24-bit transponder address. Allocated to Korea, South.
Where is Mode-S 71C734 registered?
Mode-S code 71C734 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 71C734 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C734, octal 34343464, decimal 7,456,564.
What flights does 71C734 operate?
Mode-S 71C734 has broadcast 20 distinct callsigns, including KAL053, KAL705, KAL706, KAL054, KAL072.