Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C734

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

Hex
71C734
Octal
34343464
Decimal
7,456,564
Country
KR
Broadcasting now · callsign KAL071 · 35,000 ft
Flights observed
127
Distinct callsigns
20
Country
KR
Last broadcast
21d ago

Current position

71C734 is currently broadcasting. Map zoomed to live position.

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 - 12 2026-07-02
KAL705 Korean Air 10 2026-05-27
KAL706 Korean Air 9 2026-05-28
KAL054 - 8 2026-07-02
KAL724 - 6 2026-06-29
KAL723 - 6 2026-06-29
KAL072 - 6 2026-06-27
KAL071 - 6 2026-06-27
KAL448 - 5 2026-07-07
KAL447 - 5 2026-07-07
KAL076 - 5 2026-06-21
KAL075 - 5 2026-06-20
KAL042 - 5 2026-06-29
KAL041 - 5 2026-06-29
KAL928 - 4 2026-07-07
BOE281 - 4 2026-04-22
KAL927 - 3 2026-07-06
KAL970 - 2 2026-07-05
KAL969 - 2 2026-07-04
KAL938 - 2 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-07 KAL448 - Jul 7, 18:45 UTCJul 7, 22:30 UTC3h 45m
2026-07-07 KAL447 - Jul 7, 10:15 UTCJul 7, 14:05 UTC3h 50m
2026-07-07 KAL928 - Jul 7, 06:40 UTCJul 7, 07:00 UTC20m
2026-07-06 KAL928 - Jul 6, 20:25 UTCJul 7, 05:45 UTC9h 20m
2026-07-06 KAL927 - Jul 6, 06:45 UTCJul 6, 17:55 UTC11h 10m
2026-07-06 KAL927 - Jul 6, 05:35 UTCJul 6, 05:50 UTC15m
2026-07-05 KAL434 - Jul 5, 09:30 UTCJul 6, 00:00 UTC14h 30m
2026-07-05 KAL970 - Jul 5, 03:15 UTCJul 5, 03:40 UTC25m
2026-07-04 KAL970 - Jul 4, 17:20 UTCJul 5, 02:25 UTC9h 5m
2026-07-04 KAL969 - Jul 4, 03:50 UTCJul 4, 14:50 UTC11h 0m
2026-07-04 KAL969 - Jul 4, 02:45 UTCJul 4, 03:00 UTC15m
2026-07-03 KAL448 - Jul 3, 16:30 UTCJul 3, 20:10 UTC3h 40m
2026-07-03 KAL447 - Jul 3, 10:30 UTCJul 3, 14:15 UTC3h 45m
2026-07-02 KAL054 - Jul 2, 23:15 UTCJul 3, 08:30 UTC9h 15m
2026-07-02 KAL053 - Jul 2, 12:30 UTCJul 2, 14:05 UTC1h 35m
2026-06-30 KAL448 - Jun 30, 16:25 UTCJun 30, 19:50 UTC3h 25m
2026-06-30 KAL447 - Jun 30, 10:15 UTCJun 30, 14:00 UTC3h 45m
2026-06-29 KAL042 SEA → ICN Jun 29, 20:49 UTCJun 30, 07:35 UTC10h 46m
2026-06-29 KAL041 ICN → SEA Jun 29, 08:09 UTCJun 29, 17:14 UTC9h 5m
2026-06-29 KAL724 KIX → ICN Jun 29, 04:04 UTCJun 29, 05:20 UTC1h 15m
2026-06-29 KAL723 ICN → KIX Jun 29, 01:05 UTCJun 29, 02:25 UTC1h 20m
2026-06-27 KAL072 - Jun 27, 22:09 UTCJun 28, 08:44 UTC10h 35m
2026-06-27 KAL071 ICN → YVR Jun 27, 10:10 UTCJun 27, 19:09 UTC9h 0m
2026-06-26 KAL042 SEA → ICN Jun 26, 20:55 UTCJun 27, 07:34 UTC10h 40m
2026-06-26 KAL041 ICN → SEA Jun 26, 08:15 UTCJun 26, 17:35 UTC9h 20m
2026-06-25 KAL434 ICN → ICN Jun 25, 09:55 UTCJun 26, 00:15 UTC14h 20m
2026-06-24 KAL042 SEA → ICN Jun 24, 21:00 UTCJun 25, 07:49 UTC10h 50m
2026-06-24 KAL041 ICN → SEA Jun 24, 08:49 UTCJun 24, 17:45 UTC8h 55m
2026-06-23 KAL882 ICN → ICN Jun 23, 23:50 UTCJun 24, 05:05 UTC5h 15m
2026-06-22 KAL042 - Jun 22, 20:44 UTCJun 23, 07:19 UTC10h 35m
2026-06-22 KAL041 ICN → SEA Jun 22, 08:04 UTCJun 22, 17:34 UTC9h 30m
2026-06-22 KAL724 KIX → ICN Jun 22, 04:19 UTCJun 22, 05:44 UTC1h 25m
2026-06-22 KAL723 ICN → KIX Jun 22, 01:05 UTCJun 22, 02:30 UTC1h 25m
2026-06-21 KAL076 - Jun 21, 08:04 UTCJun 21, 16:54 UTC8h 50m
2026-06-20 KAL075 ICN → YVR Jun 20, 14:14 UTCJun 20, 23:45 UTC9h 30m
2026-06-19 KAL032 DFW → ICN Jun 19, 17:55 UTCJun 20, 07:24 UTC13h 30m
2026-06-19 KAL031 ICN → DFW Jun 19, 00:55 UTCJun 19, 14:04 UTC13h 10m
2026-06-18 KAL448 - Jun 18, 16:25 UTCJun 18, 20:00 UTC3h 35m
2026-06-18 KAL447 - Jun 18, 10:20 UTCJun 18, 14:10 UTC3h 50m
2026-06-17 KAL032 DFW → ICN Jun 17, 17:40 UTCJun 18, 07:25 UTC13h 45m
2026-06-17 KAL031 - Jun 17, 00:55 UTCJun 17, 12:55 UTC12h 0m
2026-06-16 KAL448 - Jun 16, 16:39 UTCJun 16, 20:15 UTC3h 36m
2026-06-16 KAL447 - Jun 16, 10:30 UTCJun 16, 14:15 UTC3h 45m
2026-06-16 KAL938 - Jun 16, 02:40 UTCJun 16, 03:04 UTC25m
2026-06-15 KAL938 - Jun 15, 16:45 UTCJun 15, 19:45 UTC3h 0m
2026-06-15 KAL937 - Jun 15, 07:05 UTCJun 15, 13:54 UTC6h 50m
2026-06-15 KAL937 - Jun 15, 01:59 UTCJun 15, 02:10 UTC10m
2026-06-13 KAL054 - Jun 13, 23:25 UTCJun 14, 08:25 UTC9h 0m
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

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?
Yes. Mode-S 71C734 is currently airborne.
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, KAL724.