Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C091

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

Currently assigned to HL8091 · AIRBUS A220-300

Hex
71C091
Octal
34340221
Decimal
7,454,865
Country
KR
Tail
HL8091
Type
BCS3
No current signal · last broadcast 1h ago
Flights observed
468
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C091.

Country allocation

The ICAO 24-bit address 71C091 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
KAL1314 - 17 2026-06-22
KAL1725 - 16 2026-06-22
KAL1722 - 16 2026-06-22
KAL1830 Korean Air 14 2026-06-12
KAL1827 Korean Air 14 2026-06-12
KAL1814 - 14 2026-06-28
KAL1811 - 14 2026-06-28
KAL1807 - 14 2026-07-10
KAL1803 - 13 2026-06-27
KAL1843 - 12 2026-06-29
KAL1832 - 12 2026-07-11
KAL1806 - 12 2026-06-27
KAL1707 - 12 2026-06-29
KAL1704 - 12 2026-06-28
KAL1272 Korean Air 12 2026-06-13
KAL1079 - 12 2026-06-30
KAL1007 Korean Air 12 2026-06-08
KAL1844 - 11 2026-06-30
KAL1136 Korean Air 11 2026-06-09
KAL1717 - 10 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL2156 - Jul 14, 10:35 UTCJul 14, 11:50 UTC1h 15m
2026-07-14 KAL2155 - Jul 14, 08:20 UTCJul 14, 09:15 UTC55m
2026-07-14 KAL2192 - Jul 14, 04:15 UTCJul 14, 05:20 UTC1h 5m
2026-07-14 KAL2191 - Jul 14, 01:50 UTCJul 14, 02:45 UTC55m
2026-07-13 KAL2186 - Jul 13, 04:20 UTCJul 13, 05:35 UTC1h 15m
2026-07-13 KAL2185 - Jul 13, 01:55 UTCJul 13, 03:05 UTC1h 10m
2026-07-12 KAL2156 KMJ → ICN Jul 12, 10:55 UTCJul 12, 12:01 UTC1h 5m
2026-07-12 KAL2155 - Jul 12, 08:30 UTCJul 12, 09:35 UTC1h 5m
2026-07-12 KAL2186 - Jul 12, 04:25 UTCJul 12, 05:35 UTC1h 10m
2026-07-12 KAL2185 - Jul 12, 01:50 UTCJul 12, 02:55 UTC1h 5m
2026-07-11 KAL399P GMP → ICN Jul 11, 23:15 UTCJul 11, 23:40 UTC25m
2026-07-11 KAL1832 - Jul 11, 12:35 UTCJul 11, 13:10 UTC35m
2026-07-11 KAL1550 - Jul 11, 11:25 UTCJul 11, 11:50 UTC25m
2026-07-11 KAL1543 - Jul 11, 08:20 UTCJul 11, 08:40 UTC20m
2026-07-11 KAL1538 - Jul 11, 06:50 UTCJul 11, 07:15 UTC25m
2026-07-11 KAL1515 - Jul 11, 01:05 UTCJul 11, 01:25 UTC20m
2026-07-10 KAL1807 GMP → PUS Jul 10, 23:15 UTCJul 10, 23:55 UTC40m
2026-07-10 KAL400P ICN → GMP Jul 10, 21:45 UTCJul 10, 21:55 UTC10m
2026-07-10 KAL2186 - Jul 10, 04:30 UTCJul 10, 05:50 UTC1h 20m
2026-07-10 KAL2185 - Jul 10, 02:05 UTCJul 10, 03:10 UTC1h 5m
2026-07-09 KAL2156 - Jul 9, 10:55 UTCJul 9, 12:05 UTC1h 10m
2026-07-09 KAL2155 - Jul 9, 08:35 UTCJul 9, 09:35 UTC1h 0m
2026-07-09 KAL2192 OMJ → ICN Jul 9, 04:35 UTCJul 9, 05:40 UTC1h 5m
2026-07-09 KAL2191 - Jul 9, 02:05 UTCJul 9, 03:05 UTC1h 0m
2026-07-08 KAL2186 - Jul 8, 04:35 UTCJul 8, 05:50 UTC1h 15m
2026-07-08 KAL2185 - Jul 8, 02:00 UTCJul 8, 03:10 UTC1h 10m
2026-07-07 KAL2156 - Jul 7, 10:45 UTCJul 7, 11:55 UTC1h 10m
2026-07-07 KAL2155 - Jul 7, 08:15 UTCJul 7, 09:15 UTC1h 0m
2026-07-07 KAL2192 - Jul 7, 04:25 UTCJul 7, 05:30 UTC1h 5m
2026-07-07 KAL2191 - Jul 7, 01:55 UTCJul 7, 02:45 UTC50m
2026-07-06 KAL2186 - Jul 6, 04:20 UTCJul 6, 05:35 UTC1h 15m
2026-07-06 KAL2185 - Jul 6, 01:55 UTCJul 6, 03:05 UTC1h 10m
2026-07-05 KAL2186 - Jul 5, 05:30 UTCJul 5, 06:45 UTC1h 15m
2026-07-05 KAL2185 ICN → OKJ Jul 5, 01:50 UTCJul 5, 04:00 UTC2h 10m
2026-07-04 KAL2192 - Jul 4, 04:25 UTCJul 4, 05:25 UTC1h 0m
2026-07-04 KAL2191 - Jul 4, 02:00 UTCJul 4, 03:00 UTC1h 0m
2026-07-03 KAL2186 - Jul 3, 04:25 UTCJul 3, 05:35 UTC1h 10m
2026-07-03 KAL2185 - Jul 3, 01:55 UTCJul 3, 03:00 UTC1h 5m
2026-07-02 KAL2156 KMJ → ICN Jul 2, 10:45 UTCJul 2, 11:55 UTC1h 10m
2026-07-02 KAL2155 - Jul 2, 08:30 UTCJul 2, 09:25 UTC55m
2026-07-02 KAL2192 - Jul 2, 04:30 UTCJul 2, 05:20 UTC50m
2026-07-02 KAL2191 - Jul 2, 01:50 UTCJul 2, 02:30 UTC40m
2026-07-01 KAL194P - Jul 1, 23:30 UTCJul 1, 23:50 UTC20m
2026-07-01 KAL1268 - Jul 1, 08:15 UTCJul 1, 08:55 UTC40m
2026-07-01 KAL1595 - Jul 1, 06:15 UTCJul 1, 06:35 UTC20m
2026-07-01 KAL1596 - Jul 1, 04:45 UTCJul 1, 05:00 UTC15m
2026-07-01 KAL1607 KWJ → CJU Jul 1, 01:55 UTCJul 1, 02:05 UTC10m
2026-07-01 KAL1608 - Jul 1, 00:45 UTCJul 1, 00:55 UTC10m
2026-06-30 KAL1019 GMP → CJU Jun 30, 22:40 UTCJun 30, 23:15 UTC35m
2026-06-30 KAL1268 - Jun 30, 08:15 UTCJun 30, 08:55 UTC40m

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 HL8091 page for operator, model, and routing details .

Mode-S 71C091 frequently asked

What is Mode-S code 71C091?
71C091 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8091.
Where is Mode-S 71C091 registered?
Mode-S code 71C091 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 71C091 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C091, octal 34340221, decimal 7,454,865.
What flights does 71C091 operate?
Mode-S 71C091 has broadcast 20 distinct callsigns, including KAL1314, KAL1725, KAL1722, KAL1830, KAL1827.