Apparatus

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sensors Mode-S transponder

71C248

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

Currently assigned to HL8248 · BOEING 737-900

Hex
71C248
Octal
34341110
Decimal
7,455,304
Country
KR
Tail
HL8248
Type
B739
No current signal · last broadcast Jul 26, 11:15 UTC
Flights observed
292
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 11:15 UTC

Last known position

Most recent position reported by Mode-S 71C248.

Country allocation

The ICAO 24-bit address 71C248 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
KAL2134 - 24 2026-07-17
KAL2133 - 24 2026-07-17
KAL2081 Korean Air 19 2026-07-17
KAL1402 Korean Air 19 2026-07-24
KAL115 Korean Air 19 2026-07-25
KAL1405 Korean Air 18 2026-07-24
KAL116 Korean Air 18 2026-07-24
KAL126 Korean Air 17 2026-07-23
KAL134 - 13 2026-07-07
KAL1432 Korean Air 11 2026-07-22
KAL1431 Korean Air 11 2026-07-26
KAL133 - 11 2026-07-06
KAL2082 - 10 2026-07-17
KAL125 Korean Air 10 2026-07-23
KAL108 - 7 2026-07-20
KAL620 Korean Air 6 2026-07-21
KAL619 Korean Air 5 2026-07-21
KAL146 Korean Air 5 2026-07-23
KAL145 Korean Air 4 2026-07-23
KAL107 Korean Air 4 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL1431 ICN → TAE Jul 26, 10:40 UTCJul 26, 11:15 UTC35m
2026-07-26 KAL744 NGO → ICN Jul 26, 00:35 UTCJul 26, 02:00 UTC1h 25m
2026-07-25 KAL743 ICN → NGO Jul 25, 10:40 UTCJul 25, 11:55 UTC1h 15m
2026-07-25 KAL115 ICN → YNJ Jul 25, 00:55 UTCJul 25, 06:15 UTC5h 20m
2026-07-24 KAL1402 PUS → ICN Jul 24, 22:05 UTCJul 24, 22:50 UTC45m
2026-07-24 KAL1562 CJU → PUS Jul 24, 12:40 UTCJul 24, 12:55 UTC15m
2026-07-24 KAL1549 PUS → CJU Jul 24, 10:45 UTCJul 24, 11:00 UTC15m
2026-07-24 KAL1405 ICN → PUS Jul 24, 08:55 UTCJul 24, 09:35 UTC40m
2026-07-24 KAL116 YNJ → ICN Jul 24, 06:40 UTCJul 24, 07:05 UTC25m
2026-07-24 KAL115 ICN → YNJ Jul 24, 01:10 UTCJul 24, 01:30 UTC20m
2026-07-23 KAL146 CSX → ICN Jul 23, 19:45 UTCJul 23, 20:10 UTC25m
2026-07-23 KAL145 ICN → CSX Jul 23, 13:10 UTCJul 23, 13:35 UTC25m
2026-07-23 KAL126 MEL → ICN Jul 23, 07:55 UTCJul 23, 08:45 UTC50m
2026-07-23 KAL125 ICN → MEL Jul 23, 01:40 UTCJul 23, 03:40 UTC2h 0m
2026-07-22 KAL1432 TAE → ICN Jul 22, 23:00 UTCJul 22, 23:35 UTC35m
2026-07-22 KAL107 ICN → HGH Jul 22, 03:20 UTCJul 22, 04:00 UTC40m
2026-07-21 KAL620 HKG → ICN Jul 21, 19:30 UTCJul 21, 22:55 UTC3h 25m
2026-07-21 KAL619 ICN → HKG Jul 21, 14:10 UTCJul 21, 17:40 UTC3h 30m
2026-07-21 KAL744 NGO → ICN Jul 21, 00:30 UTCJul 21, 02:00 UTC1h 30m
2026-07-20 KAL743 ICN → NGO Jul 20, 10:55 UTCJul 20, 12:15 UTC1h 20m
2026-07-20 KAL108 ICN → ICN Jul 20, 03:35 UTCJul 20, 08:55 UTC5h 20m
2026-07-19 KAL1432 TAE → ICN Jul 19, 23:05 UTCJul 19, 23:40 UTC35m
2026-07-19 KAL1431 ICN → TAE Jul 19, 10:15 UTCJul 19, 10:40 UTC25m
2026-07-19 KAL128 - Jul 19, 03:55 UTCJul 19, 05:50 UTC1h 55m
2026-07-19 - - Jul 19, 01:10 UTCJul 19, 01:20 UTC10m
2026-07-18 KAL127 - Jul 18, 23:35 UTCJul 19, 00:00 UTC25m
2026-07-18 KAL9760 KUH → ICN Jul 18, 07:10 UTCJul 18, 09:45 UTC2h 35m
2026-07-18 KAL9759 - Jul 18, 02:45 UTCJul 18, 05:00 UTC2h 16m
2026-07-17 KAL1402 - Jul 17, 22:05 UTCJul 17, 22:45 UTC40m
2026-07-17 KAL2134 - Jul 17, 11:10 UTCJul 17, 12:30 UTC1h 20m
2026-07-17 KAL2133 - Jul 17, 08:40 UTCJul 17, 09:40 UTC1h 0m
2026-07-17 KAL2082 - Jul 17, 06:05 UTCJul 17, 07:00 UTC55m
2026-07-17 KAL2081 PUS → TAO Jul 17, 02:20 UTCJul 17, 03:14 UTC55m
2026-07-16 KAL2134 - Jul 16, 11:10 UTCJul 16, 12:20 UTC1h 10m
2026-07-16 KAL2133 - Jul 16, 08:50 UTCJul 16, 09:50 UTC1h 0m
2026-07-16 KAL2081 PUS → PUS Jul 16, 02:25 UTCJul 16, 07:25 UTC5h 0m
2026-07-15 KAL2134 - Jul 15, 11:10 UTCJul 15, 12:10 UTC1h 0m
2026-07-15 KAL2133 - Jul 15, 08:40 UTCJul 15, 09:40 UTC1h 0m
2026-07-15 KAL2082 - Jul 15, 06:20 UTCJul 15, 07:10 UTC50m
2026-07-15 KAL2081 - Jul 15, 02:25 UTCJul 15, 03:20 UTC55m
2026-07-14 KAL1562 - Jul 14, 12:35 UTCJul 14, 12:50 UTC15m
2026-07-14 KAL1549 - Jul 14, 10:40 UTCJul 14, 10:50 UTC10m
2026-07-14 KAL1405 - Jul 14, 08:30 UTCJul 14, 09:10 UTC40m
2026-07-13 KAL128 ICN → ICN Jul 13, 23:45 UTCJul 14, 06:00 UTC6h 15m
2026-07-13 KAL126 - Jul 13, 01:45 UTCJul 13, 08:30 UTC6h 45m
2026-07-12 KAL620 - Jul 12, 19:30 UTCJul 12, 23:00 UTC3h 30m
2026-07-12 KAL619 - Jul 12, 14:05 UTCJul 12, 17:45 UTC3h 40m
2026-07-11 KAL116 - Jul 11, 05:50 UTCJul 11, 06:25 UTC35m
2026-07-11 KAL115 - Jul 11, 00:40 UTCJul 11, 01:00 UTC20m
2026-07-10 KAL1402 PUS → ICN Jul 10, 22:00 UTCJul 10, 22:45 UTC45m

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 HL8248 page for operator, model, and routing details .

Mode-S 71C248 frequently asked

What is Mode-S code 71C248?
71C248 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8248.
Where is Mode-S 71C248 registered?
Mode-S code 71C248 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 71C248 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C248, octal 34341110, decimal 7,455,304.
What flights does 71C248 operate?
Mode-S 71C248 has broadcast 20 distinct callsigns, including KAL2134, KAL2133, KAL2081, KAL1402, KAL115.