Apparatus

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sensors Mode-S transponder

71C250

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

Currently assigned to HL8250 · BOEING 777-300ER

Hex
71C250
Octal
34341120
Decimal
7,455,312
Country
KR
Tail
HL8250
Type
B77W
No current signal · last broadcast Jul 26, 08:00 UTC
Flights observed
247
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 08:00 UTC

Last known position

Most recent position reported by Mode-S 71C250.

Country allocation

The ICAO 24-bit address 71C250 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
KAL926 Korean Air 20 2026-07-24
KAL652 Korean Air 19 2026-07-24
KAL651 Korean Air 19 2026-07-24
KAL925 Korean Air 16 2026-07-23
KAL038 Korean Air 16 2026-07-25
KAL037 Korean Air 14 2026-07-25
KAL946 Korean Air 10 2026-07-20
KAL945 Korean Air 9 2026-07-19
KAL438 Korean Air 9 2026-05-28
KAL437 Korean Air 8 2026-05-28
KAL602 Korean Air 7 2026-04-20
KAL601 Korean Air 6 2026-04-15
KAL093 Korean Air 6 2026-04-17
KAL091 Korean Air 6 2026-07-21
KAL788 - 5 2026-07-07
KAL787 Korean Air 5 2026-07-06
KAL766 - 5 2026-04-14
KAL622 - 5 2026-06-23
KAL621 - 5 2026-06-22
KAL094 Korean Air 5 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 KAL038 ORD → ICN Jul 25, 17:50 UTCJul 26, 08:00 UTC14h 11m
2026-07-25 KAL037 ICN → ORD Jul 25, 02:30 UTCJul 25, 14:50 UTC12h 20m
2026-07-24 KAL652 BKK → ICN Jul 24, 16:40 UTCJul 24, 21:45 UTC5h 5m
2026-07-24 KAL651 ICN → BKK Jul 24, 09:30 UTCJul 24, 14:35 UTC5h 5m
2026-07-24 KAL926 AMS → ICN Jul 24, 07:10 UTCJul 24, 07:25 UTC15m
2026-07-23 KAL926 AMS → ICN Jul 23, 20:15 UTCJul 24, 06:20 UTC10h 5m
2026-07-23 KAL925 ICN → AMS Jul 23, 04:45 UTCJul 23, 16:40 UTC11h 55m
2026-07-23 KAL925 ICN → AMS Jul 23, 03:35 UTCJul 23, 03:55 UTC20m
2026-07-21 KAL092 - Jul 21, 18:30 UTCJul 22, 01:35 UTC7h 5m
2026-07-21 KAL091 ICN → BOS Jul 21, 00:55 UTCJul 21, 14:20 UTC13h 25m
2026-07-20 KAL652 BKK → ICN Jul 20, 17:15 UTCJul 20, 22:05 UTC4h 50m
2026-07-20 KAL651 ICN → BKK Jul 20, 09:45 UTCJul 20, 14:40 UTC4h 55m
2026-07-20 KAL946 FRA → ICN Jul 20, 04:15 UTCJul 20, 04:45 UTC30m
2026-07-19 KAL946 FRA → ICN Jul 19, 18:05 UTCJul 20, 03:35 UTC9h 30m
2026-07-19 KAL945 ICN → FRA Jul 19, 03:30 UTCJul 19, 15:15 UTC11h 45m
2026-07-19 KAL945 ICN → FRA Jul 19, 02:20 UTCJul 19, 02:40 UTC20m
2026-07-18 KAL658 - Jul 18, 17:05 UTCJul 18, 19:50 UTC2h 45m
2026-07-18 KAL658 - Jul 18, 14:55 UTCJul 18, 15:05 UTC10m
2026-07-18 KAL657 - Jul 18, 05:55 UTCJul 18, 06:20 UTC25m
2026-07-18 KAL657 - Jul 18, 01:25 UTCJul 18, 04:05 UTC2h 41m
2026-07-16 KAL038 - Jul 16, 18:05 UTCJul 17, 07:14 UTC13h 10m
2026-07-16 KAL037 ICN → ORD Jul 16, 02:15 UTCJul 16, 14:35 UTC12h 20m
2026-07-15 KAL652 - Jul 15, 16:45 UTCJul 15, 21:40 UTC4h 55m
2026-07-15 KAL651 - Jul 15, 09:35 UTCJul 15, 12:10 UTC2h 35m
2026-07-15 KAL926 - Jul 15, 06:35 UTCJul 15, 07:00 UTC25m
2026-07-14 KAL926 - Jul 14, 20:05 UTCJul 15, 05:55 UTC9h 49m
2026-07-14 KAL925 ICN → AMS Jul 14, 03:20 UTCJul 14, 16:30 UTC13h 10m
2026-07-12 KAL038 - Jul 12, 17:55 UTCJul 13, 07:10 UTC13h 15m
2026-07-12 KAL037 ICN → ORD Jul 12, 02:20 UTCJul 12, 14:50 UTC12h 30m
2026-07-11 KAL652 - Jul 11, 22:25 UTCJul 11, 22:45 UTC20m
2026-07-11 KAL652 - Jul 11, 19:10 UTCJul 11, 19:20 UTC10m
2026-07-11 KAL652 - Jul 11, 17:55 UTCJul 11, 18:05 UTC10m
2026-07-11 KAL651 - Jul 11, 15:25 UTCJul 11, 15:55 UTC30m
2026-07-11 KAL651 - Jul 11, 10:00 UTCJul 11, 13:25 UTC3h 25m
2026-07-11 KAL946 - Jul 11, 04:50 UTCJul 11, 05:15 UTC25m
2026-07-10 KAL946 - Jul 10, 18:20 UTCJul 11, 04:01 UTC9h 41m
2026-07-10 KAL945 - Jul 10, 03:40 UTCJul 10, 15:20 UTC11h 40m
2026-07-10 KAL945 - Jul 10, 02:20 UTCJul 10, 02:45 UTC25m
2026-07-09 KAL646 - Jul 9, 21:10 UTCJul 9, 23:35 UTC2h 25m
2026-07-09 KAL645 - Jul 9, 11:45 UTCJul 9, 15:30 UTC3h 45m
2026-07-09 KAL645 - Jul 9, 10:10 UTCJul 9, 10:45 UTC35m
2026-07-08 KAL038 ORD → ICN Jul 8, 18:05 UTCJul 9, 07:15 UTC13h 10m
2026-07-08 KAL037 ICN → ORD Jul 8, 02:10 UTCJul 8, 14:30 UTC12h 20m
2026-07-07 KAL644 - Jul 7, 17:25 UTCJul 7, 20:05 UTC2h 40m
2026-07-07 KAL643 - Jul 7, 10:15 UTCJul 7, 10:40 UTC25m
2026-07-07 KAL643 - Jul 7, 05:05 UTCJul 7, 07:45 UTC2h 40m
2026-07-07 KAL788 - Jul 7, 01:55 UTCJul 7, 02:55 UTC1h 0m
2026-07-06 KAL787 ICN → FUK Jul 6, 23:25 UTCJul 7, 00:20 UTC55m
2026-07-06 KAL926 - Jul 6, 06:55 UTCJul 6, 07:15 UTC20m
2026-07-05 KAL926 - Jul 5, 19:50 UTCJul 6, 06:05 UTC10h 15m

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 HL8250 page for operator, model, and routing details .

Mode-S 71C250 frequently asked

What is Mode-S code 71C250?
71C250 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8250.
Where is Mode-S 71C250 registered?
Mode-S code 71C250 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 71C250 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 08:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C250, octal 34341120, decimal 7,455,312.
What flights does 71C250 operate?
Mode-S 71C250 has broadcast 20 distinct callsigns, including KAL926, KAL652, KAL651, KAL925, KAL038.