Apparatus

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sensors Mode-S transponder

71C558

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

Currently assigned to HL8558 · AIRBUS A-321neo

Hex
71C558
Octal
34342530
Decimal
7,456,088
Country
KR
Tail
HL8558
Type
A21N
Broadcasting now · callsign KAL2179 · 18,875 ft
Flights observed
368
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Current position

71C558 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C558 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
KAL2052 Korean Air 49 2026-05-15
KAL2120 Korean Air 37 2026-05-15
KAL2119 Korean Air 36 2026-05-15
KAL2051 Korean Air 30 2026-05-15
KAL852 - 8 2026-07-03
KAL2016 - 8 2026-07-12
KAL2005 - 8 2026-07-08
KAL2015 - 7 2026-07-12
KAL1408 - 7 2026-07-11
KAL1403 - 7 2026-07-10
KAL851 - 5 2026-07-02
KAL726 - 5 2026-06-20
KAL725 - 5 2026-06-20
KAL2086 - 5 2026-06-24
KAL2006 - 5 2026-07-08
KAL738 - 4 2026-06-30
KAL737 - 4 2026-06-30
KAL1410 - 4 2026-06-24
KAL864 - 3 2026-07-02
KAL770 - 3 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL2198 - Jul 14, 04:15 UTCJul 14, 05:55 UTC1h 40m
2026-07-14 KAL2197 - Jul 14, 01:00 UTCJul 14, 02:25 UTC1h 25m
2026-07-13 KAL162 - Jul 13, 19:15 UTCJul 13, 19:35 UTC20m
2026-07-13 KAL161 - Jul 13, 09:55 UTCJul 13, 10:20 UTC25m
2026-07-13 KAL792 - Jul 13, 06:15 UTCJul 13, 07:05 UTC50m
2026-07-13 KAL791 - Jul 13, 02:25 UTCJul 13, 03:30 UTC1h 5m
2026-07-12 KAL2016 - Jul 12, 06:25 UTCJul 12, 09:20 UTC2h 55m
2026-07-12 KAL2015 - Jul 12, 01:25 UTCJul 12, 04:35 UTC3h 10m
2026-07-11 KAL2180 - Jul 11, 10:10 UTCJul 11, 11:15 UTC1h 5m
2026-07-11 KAL2179 - Jul 11, 07:40 UTCJul 11, 08:40 UTC1h 0m
2026-07-11 KAL1408 PUS → ICN Jul 11, 01:50 UTCJul 11, 02:30 UTC40m
2026-07-10 KAL1403 ICN → PUS Jul 10, 23:35 UTCJul 11, 00:15 UTC40m
2026-07-10 KAL772 - Jul 10, 12:10 UTCJul 10, 14:40 UTC2h 30m
2026-07-10 KAL771 - Jul 10, 08:20 UTCJul 10, 10:35 UTC2h 15m
2026-07-09 KAL2016 - Jul 9, 06:40 UTCJul 9, 09:50 UTC3h 10m
2026-07-09 KAL2015 - Jul 9, 01:50 UTCJul 9, 05:00 UTC3h 10m
2026-07-08 KAL2006 HKG → ICN Jul 8, 10:40 UTCJul 8, 13:50 UTC3h 10m
2026-07-08 KAL2005 - Jul 8, 04:55 UTCJul 8, 08:30 UTC3h 35m
2026-07-08 KAL1408 PUS → ICN Jul 8, 01:55 UTCJul 8, 02:40 UTC45m
2026-07-07 KAL1403 ICN → PUS Jul 7, 23:40 UTCJul 8, 00:30 UTC50m
2026-07-07 KAL164 - Jul 7, 10:35 UTCJul 7, 18:30 UTC7h 55m
2026-07-07 KAL142 - Jul 7, 07:10 UTCJul 7, 07:35 UTC25m
2026-07-07 KAL141 - Jul 7, 00:45 UTCJul 7, 02:10 UTC1h 25m
2026-07-06 TEST ICN → ICN Jul 6, 13:30 UTCJul 6, 13:55 UTC25m
2026-07-06 KAL2016 - Jul 6, 07:00 UTCJul 6, 10:20 UTC3h 20m
2026-07-06 KAL2015 - Jul 6, 02:15 UTCJul 6, 05:25 UTC3h 10m
2026-07-05 KAL626 - Jul 5, 17:35 UTCJul 5, 21:05 UTC3h 30m
2026-07-05 KAL625 - Jul 5, 11:50 UTCJul 5, 15:30 UTC3h 40m
2026-07-05 KAL770 - Jul 5, 07:35 UTCJul 5, 10:00 UTC2h 25m
2026-07-05 KAL769 ICN → CTS Jul 5, 03:50 UTCJul 5, 06:00 UTC2h 10m
2026-07-04 KAL1406 PUS → ICN Jul 4, 23:45 UTCJul 5, 00:30 UTC45m
2026-07-04 KAL1401 ICN → PUS Jul 4, 21:40 UTCJul 4, 22:20 UTC40m
2026-07-04 KAL2006 HKG → ICN Jul 4, 10:40 UTCJul 4, 13:45 UTC3h 5m
2026-07-04 KAL2005 - Jul 4, 08:05 UTCJul 4, 08:25 UTC20m
2026-07-04 KAL2005 - Jul 4, 04:50 UTCJul 4, 07:05 UTC2h 15m
2026-07-03 KAL852 - Jul 3, 11:50 UTCJul 3, 12:10 UTC20m
2026-07-03 KAL2065 - Jul 3, 07:05 UTCJul 3, 07:45 UTC40m
2026-07-03 KAL2066 - Jul 3, 04:35 UTCJul 3, 04:45 UTC10m
2026-07-02 KAL851 - Jul 2, 23:50 UTCJul 3, 00:10 UTC20m
2026-07-02 KAL864 - Jul 2, 18:55 UTCJul 2, 19:15 UTC20m
2026-07-02 KAL864 - Jul 2, 17:45 UTCJul 2, 18:00 UTC15m
2026-07-02 KAL863 - Jul 2, 11:30 UTCJul 2, 11:50 UTC20m
2026-07-02 KAL142 - Jul 2, 07:40 UTCJul 2, 08:00 UTC20m
2026-07-02 KAL141 - Jul 2, 00:55 UTCJul 2, 01:20 UTC25m
2026-07-01 KAL875 ICN → ICN Jul 1, 09:55 UTCJul 1, 13:15 UTC3h 20m
2026-07-01 KAL2194 - Jul 1, 04:00 UTCJul 1, 06:10 UTC2h 10m
2026-07-01 KAL2193 - Jul 1, 00:15 UTCJul 1, 02:15 UTC2h 0m
2026-06-30 KAL738 KIX → ICN Jun 30, 17:25 UTCJun 30, 18:50 UTC1h 25m
2026-06-30 KAL737 ICN → KIX Jun 30, 12:15 UTCJun 30, 13:40 UTC1h 25m
2026-06-30 KAL770 - Jun 30, 07:35 UTCJun 30, 10:05 UTC2h 30m

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 HL8558 page for operator, model, and routing details .

Mode-S 71C558 frequently asked

What is Mode-S code 71C558?
71C558 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8558.
Where is Mode-S 71C558 registered?
Mode-S code 71C558 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 71C558 broadcasting right now?
Yes. Mode-S 71C558 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C558, octal 34342530, decimal 7,456,088.
What flights does 71C558 operate?
Mode-S 71C558 has broadcast 20 distinct callsigns, including KAL2052, KAL2120, KAL2119, KAL2051, KAL852.