Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C241

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

Currently assigned to HL8241 · BOEING 737-800

Hex
71C241
Octal
34341101
Decimal
7,455,297
Country
KR
Tail
HL8241
Type
B738
No current signal · last broadcast 21h ago
Flights observed
139
Distinct callsigns
20
Country
KR
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 71C241.

Country allocation

The ICAO 24-bit address 71C241 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
KAL155 - 21 2026-07-11
KAL156 - 19 2026-07-13
KAL418 - 14 2026-06-29
KAL620 - 11 2026-07-13
KAL619 - 11 2026-07-13
KAL1431 - 9 2026-07-07
KAL856 Korean Air 8 2026-06-05
KAL855 Korean Air 8 2026-06-05
KAL1432 Korean Air 8 2026-07-07
KAL417 - 3 2026-06-27
KAL8795 Korean Air 2 2026-05-01
KAL876 - 2 2026-07-08
KAL875 - 2 2026-07-08
KAL2186 - 2 2026-06-24
KAL2185 - 2 2026-06-24
KAL194F - 2 2026-05-22
KAL134 - 2 2026-07-03
KAL133 - 2 2026-07-02
KAL8796 Korean Air 1 2026-05-01
KAL599F - 1 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAL620 - Jul 13, 19:25 UTCJul 13, 22:55 UTC3h 30m
2026-07-13 KAL619 ICN → MNL Jul 13, 13:50 UTCJul 13, 17:25 UTC3h 35m
2026-07-13 KAL156 - Jul 13, 04:40 UTCJul 13, 11:00 UTC6h 20m
2026-07-12 KAL128 - Jul 12, 03:30 UTCJul 12, 12:25 UTC8h 55m
2026-07-11 KAL155 - Jul 11, 04:45 UTCJul 11, 10:20 UTC5h 35m
2026-07-09 KAL2198 - Jul 9, 04:25 UTCJul 9, 06:10 UTC1h 45m
2026-07-09 KAL2197 - Jul 9, 01:10 UTCJul 9, 02:30 UTC1h 20m
2026-07-08 KAL876 - Jul 8, 12:45 UTCJul 8, 13:05 UTC20m
2026-07-08 KAL875 - Jul 8, 10:00 UTCJul 8, 10:20 UTC20m
2026-07-07 KAL1432 TAE → ICN Jul 7, 23:00 UTCJul 7, 23:35 UTC35m
2026-07-07 KAL1431 - Jul 7, 10:30 UTCJul 7, 11:05 UTC35m
2026-07-06 KAL876 - Jul 6, 12:45 UTCJul 6, 13:00 UTC15m
2026-07-06 KAL875 - Jul 6, 09:55 UTCJul 6, 10:15 UTC20m
2026-07-05 KAL156 ICN → ICN Jul 5, 04:55 UTCJul 5, 10:40 UTC5h 45m
2026-07-04 KAL620 - Jul 4, 19:15 UTCJul 4, 22:45 UTC3h 30m
2026-07-04 KAL619 ICN → MNL Jul 4, 14:00 UTCJul 4, 17:30 UTC3h 30m
2026-07-04 KAL1412 PUS → ICN Jul 4, 09:30 UTCJul 4, 10:15 UTC45m
2026-07-04 KAL1411 ICN → PUS Jul 4, 06:40 UTCJul 4, 07:25 UTC45m
2026-07-03 KAL620 - Jul 3, 19:30 UTCJul 3, 23:10 UTC3h 40m
2026-07-03 KAL619 - Jul 3, 13:50 UTCJul 3, 17:15 UTC3h 25m
2026-07-03 KAL134 - Jul 3, 04:20 UTCJul 3, 04:40 UTC20m
2026-07-02 KAL133 - Jul 2, 23:25 UTCJul 2, 23:45 UTC20m
2026-07-02 KAL155 - Jul 2, 05:10 UTCJul 2, 10:45 UTC5h 35m
2026-07-01 KAL155 ICN → ICN Jul 1, 05:05 UTCJul 1, 10:55 UTC5h 50m
2026-06-30 KAAL418 - Jun 30, 09:35 UTCJun 30, 20:15 UTC10h 40m
2026-06-29 KAL418 - Jun 29, 09:44 UTCJun 29, 20:00 UTC10h 15m
2026-06-28 KAL418 - Jun 28, 09:45 UTCJun 28, 20:19 UTC10h 35m
2026-06-27 KAL417 ICN → ICN Jun 27, 09:40 UTCJun 27, 20:19 UTC10h 40m
2026-06-26 KAL1432 TAE → ICN Jun 26, 22:55 UTCJun 26, 23:25 UTC30m
2026-06-26 KAL1431 - Jun 26, 10:30 UTCJun 26, 11:05 UTC35m
2026-06-25 KAL418 ICN → ICN Jun 25, 09:40 UTCJun 25, 20:25 UTC10h 45m
2026-06-24 KAL418 ICN → ICN Jun 24, 09:45 UTCJun 24, 20:30 UTC10h 45m
2026-06-24 KAL2186 - Jun 24, 05:05 UTCJun 24, 06:25 UTC1h 20m
2026-06-24 KAL2185 ICN → OKJ Jun 24, 02:00 UTCJun 24, 03:04 UTC1h 5m
2026-06-23 KAL418 ICN → ICN Jun 23, 09:40 UTCJun 23, 20:34 UTC10h 55m
2026-06-22 KAL620 - Jun 22, 19:34 UTCJun 22, 23:05 UTC3h 30m
2026-06-22 KAL619 ICN → MNL Jun 22, 13:59 UTCJun 22, 17:34 UTC3h 35m
2026-06-22 KAL155 ICN → ICN Jun 22, 04:54 UTCJun 22, 10:30 UTC5h 35m
2026-06-21 KAL418 GUM → ICN Jun 21, 09:40 UTCJun 21, 20:45 UTC11h 5m
2026-06-21 KAL134 - Jun 21, 04:14 UTCJun 21, 04:39 UTC25m
2026-06-20 KAL133 - Jun 20, 23:29 UTCJun 20, 23:50 UTC20m
2026-06-20 KAL417 ICN → GUM Jun 20, 09:49 UTCJun 20, 20:25 UTC10h 35m
2026-06-19 KAL620 HKG → ICN Jun 19, 19:34 UTCJun 19, 23:04 UTC3h 30m
2026-06-19 KAL619 ICN → HKG Jun 19, 13:59 UTCJun 19, 17:29 UTC3h 30m
2026-06-18 KAL418 GUM → ICN Jun 18, 09:45 UTCJun 18, 20:30 UTC10h 45m
2026-06-17 KAL500P - Jun 17, 20:40 UTCJun 17, 21:10 UTC30m
2026-06-11 KAL599F - Jun 11, 14:25 UTCJun 11, 15:00 UTC35m
2026-06-11 KAL155 ICN → HFE Jun 11, 04:55 UTCJun 11, 10:30 UTC5h 35m
2026-06-10 KAL418 GUM → ICN Jun 10, 09:55 UTCJun 10, 20:25 UTC10h 30m
2026-06-09 KAL418 GUM → ICN Jun 9, 09:50 UTCJun 9, 20:35 UTC10h 45m

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 HL8241 page for operator, model, and routing details .

Mode-S 71C241 frequently asked

What is Mode-S code 71C241?
71C241 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8241.
Where is Mode-S 71C241 registered?
Mode-S code 71C241 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 71C241 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C241, octal 34341101, decimal 7,455,297.
What flights does 71C241 operate?
Mode-S 71C241 has broadcast 20 distinct callsigns, including KAL155, KAL156, KAL418, KAL620, KAL619.