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 4h ago
Flights observed
251
Distinct callsigns
20
Country
KR
Last broadcast
4h ago

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 - 21 2026-07-09
KAL2133 - 21 2026-07-09
KAL1405 - 17 2026-07-14
KAL1402 - 17 2026-07-10
KAL116 - 17 2026-07-11
KAL115 - 17 2026-07-11
KAL2081 - 16 2026-07-10
KAL126 - 16 2026-07-13
KAL134 - 13 2026-07-07
KAL133 - 11 2026-07-06
KAL1432 Korean Air 9 2026-07-05
KAL1431 - 9 2026-07-05
KAL125 Korean Air 9 2026-06-05
KAL2082 - 8 2026-07-10
KAL108 Korean Air 6 2026-06-12
KAL620 - 5 2026-07-12
KAL619 - 4 2026-07-12
KAL146 Korean Air 4 2026-06-12
KAL145 Korean Air 3 2026-06-12
KAL107 Korean Air 3 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-10 KAL2082 - Jul 10, 06:50 UTCJul 10, 07:35 UTC45m
2026-07-10 KAL2081 - Jul 10, 02:35 UTCJul 10, 03:25 UTC50m
2026-07-09 KAL2134 - Jul 9, 11:45 UTCJul 9, 12:45 UTC1h 0m
2026-07-09 KAL2133 - Jul 9, 09:45 UTCJul 9, 10:45 UTC1h 0m
2026-07-09 KAL2081 PUS → PUS Jul 9, 02:20 UTCJul 9, 08:40 UTC6h 20m
2026-07-08 KAL2134 - Jul 8, 10:55 UTCJul 8, 12:00 UTC1h 5m
2026-07-08 KAL2133 - Jul 8, 08:35 UTCJul 8, 09:40 UTC1h 5m
2026-07-08 KAL2081 - Jul 8, 02:20 UTCJul 8, 07:15 UTC4h 55m
2026-07-07 KAL1562 - Jul 7, 12:25 UTCJul 7, 12:45 UTC20m
2026-07-07 KAL1549 - Jul 7, 10:25 UTCJul 7, 10:40 UTC15m
2026-07-07 KAL1405 - Jul 7, 08:35 UTCJul 7, 09:20 UTC45m
2026-07-07 KAL134 - Jul 7, 04:30 UTCJul 7, 04:50 UTC20m
2026-07-06 KAL133 - Jul 6, 23:10 UTCJul 6, 23:35 UTC25m
2026-07-06 KAL126 - Jul 6, 02:20 UTCJul 6, 09:10 UTC6h 50m
2026-07-05 KAL1432 TAE → ICN Jul 5, 23:10 UTCJul 5, 23:40 UTC30m
2026-07-05 KAL1431 - Jul 5, 10:30 UTCJul 5, 10:50 UTC20m
2026-07-05 KAL134 - Jul 5, 04:30 UTCJul 5, 04:55 UTC25m
2026-07-04 KAL133 - Jul 4, 23:25 UTCJul 4, 23:40 UTC15m
2026-07-04 KAL134 - Jul 4, 04:30 UTCJul 4, 04:50 UTC20m
2026-07-03 KAL133 - Jul 3, 23:30 UTCJul 3, 23:50 UTC20m
2026-07-03 KAL708 - Jul 3, 10:15 UTCJul 3, 12:10 UTC1h 55m
2026-07-03 KAL707 - Jul 3, 06:10 UTCJul 3, 08:10 UTC2h 0m
2026-07-02 KAL1432 TAE → ICN Jul 2, 23:05 UTCJul 2, 23:35 UTC30m
2026-07-02 KAL1431 - Jul 2, 10:10 UTCJul 2, 10:45 UTC35m
2026-07-02 KAL116 - Jul 2, 06:25 UTCJul 2, 06:51 UTC26m
2026-07-02 KAL115 - Jul 2, 01:05 UTCJul 2, 01:25 UTC20m
2026-07-01 KAL116 - Jul 1, 05:35 UTCJul 1, 06:10 UTC35m
2026-07-01 KAL115 - Jul 1, 00:40 UTCJul 1, 00:55 UTC15m
2026-06-30 KAL1402 PUS → ICN Jun 30, 22:05 UTCJun 30, 22:40 UTC35m
2026-06-30 KAL2134 - Jun 30, 11:10 UTCJun 30, 12:15 UTC1h 5m
2026-06-30 KAL2133 - Jun 30, 08:35 UTCJun 30, 09:35 UTC1h 0m
2026-06-30 KAL2082 - Jun 30, 02:10 UTCJun 30, 07:05 UTC4h 55m
2026-06-29 KAL2134 - Jun 29, 11:04 UTCJun 29, 12:14 UTC1h 10m
2026-06-29 KAL2133 - Jun 29, 08:35 UTCJun 29, 09:34 UTC1h 0m
2026-06-29 KAL2082 - Jun 29, 06:09 UTCJun 29, 07:05 UTC55m
2026-06-29 KAL2081 - Jun 29, 02:14 UTCJun 29, 02:54 UTC40m
2026-06-28 KAL1405 - Jun 28, 08:25 UTCJun 28, 09:05 UTC40m
2026-06-28 KAL134 - Jun 28, 04:25 UTCJun 28, 04:44 UTC20m
2026-06-27 KAL133 - Jun 27, 23:19 UTCJun 27, 23:39 UTC20m
2026-06-27 KAL116 - Jun 27, 09:15 UTCJun 27, 09:44 UTC30m
2026-06-27 KAL115 - Jun 27, 03:44 UTCJun 27, 04:05 UTC20m

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 4h ago.
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, KAL1405, KAL1402, KAL116.