Apparatus

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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
Broadcasting now · callsign KAL707 · 3,225 ft
Flights observed
510
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:00 UTC

Current position

71C091 is currently broadcasting. Map zoomed to live position.

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
KAL2186 Korean Air 11 2026-07-26
KAL2185 Korean Air 11 2026-07-26
KAL1844 - 11 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL2156 KMJ → ICN Jul 26, 10:50 UTCJul 26, 12:00 UTC1h 10m
2026-07-26 KAL2155 ICN → KMJ Jul 26, 08:25 UTCJul 26, 09:20 UTC55m
2026-07-26 KAL2186 OKJ → ICN Jul 26, 04:25 UTCJul 26, 05:35 UTC1h 10m
2026-07-26 KAL2185 ICN → OKJ Jul 26, 02:05 UTCJul 26, 03:10 UTC1h 5m
2026-07-25 KAL708 - Jul 25, 10:40 UTCJul 25, 12:45 UTC2h 5m
2026-07-25 KAL707 - Jul 25, 06:50 UTCJul 25, 08:50 UTC2h 0m
2026-07-25 KAL2190 KMQ → ICN Jul 25, 01:30 UTCJul 25, 03:00 UTC1h 30m
2026-07-24 KAL2189 ICN → KMQ Jul 24, 23:00 UTCJul 25, 00:20 UTC1h 20m
2026-07-24 KAL2186 OKJ → ICN Jul 24, 04:55 UTCJul 24, 06:00 UTC1h 5m
2026-07-24 KAL2185 ICN → OKJ Jul 24, 02:20 UTCJul 24, 03:25 UTC1h 5m
2026-07-23 KAL708 NRT → ICN Jul 23, 10:15 UTCJul 23, 12:15 UTC2h 0m
2026-07-23 KAL707 ICN → NRT Jul 23, 06:15 UTCJul 23, 08:10 UTC1h 55m
2026-07-23 KAL2190 KMQ → ICN Jul 23, 01:35 UTCJul 23, 03:10 UTC1h 35m
2026-07-22 KAL2189 ICN → KMQ Jul 22, 23:00 UTCJul 23, 00:20 UTC1h 20m
2026-07-22 KAL2186 OKJ → ICN Jul 22, 04:50 UTCJul 22, 05:10 UTC20m
2026-07-22 KAL2185 ICN → OKJ Jul 22, 02:05 UTCJul 22, 03:25 UTC1h 20m
2026-07-21 KAL2156 KMJ → ICN Jul 21, 10:40 UTCJul 21, 11:50 UTC1h 10m
2026-07-21 KAL2155 ICN → KMJ Jul 21, 08:25 UTCJul 21, 09:30 UTC1h 5m
2026-07-21 KAL2192 NGS → ICN Jul 21, 04:30 UTCJul 21, 05:30 UTC1h 0m
2026-07-21 KAL2191 ICN → NGS Jul 21, 02:05 UTCJul 21, 03:05 UTC1h 0m
2026-07-20 KAL708 - Jul 20, 10:20 UTCJul 20, 12:20 UTC2h 0m
2026-07-20 KAL707 - Jul 20, 06:35 UTCJul 20, 08:30 UTC1h 55m
2026-07-20 KAL2190 KMQ → ICN Jul 20, 01:35 UTCJul 20, 03:05 UTC1h 30m
2026-07-19 KAL2189 ICN → KMQ Jul 19, 23:00 UTCJul 20, 00:25 UTC1h 25m
2026-07-19 KAL708 - Jul 19, 10:15 UTCJul 19, 12:10 UTC1h 55m
2026-07-19 KAL707 ICN → NRT Jul 19, 06:05 UTCJul 19, 08:00 UTC1h 55m
2026-07-19 KAL2190 KMQ → ICN Jul 19, 01:20 UTCJul 19, 02:45 UTC1h 25m
2026-07-18 KAL2189 ICN → KMQ Jul 18, 22:45 UTCJul 19, 00:15 UTC1h 30m
2026-07-18 KAL708 NRT → ICN Jul 18, 10:15 UTCJul 18, 12:15 UTC2h 0m
2026-07-18 KAL0707 ICN → NRT Jul 18, 06:20 UTCJul 18, 08:10 UTC1h 50m
2026-07-18 KAL2190 - Jul 18, 01:20 UTCJul 18, 02:45 UTC1h 25m
2026-07-17 KAL2189 ICN → KMQ Jul 17, 22:45 UTCJul 18, 00:00 UTC1h 15m
2026-07-17 KAL708 - Jul 17, 10:20 UTCJul 17, 12:19 UTC2h 0m
2026-07-17 KAL707 ICN → NRT Jul 17, 06:10 UTCJul 17, 08:15 UTC2h 5m
2026-07-17 KAL2190 - Jul 17, 01:25 UTCJul 17, 02:45 UTC1h 20m
2026-07-16 KAL2189 ICN → KMQ Jul 16, 22:49 UTCJul 17, 00:14 UTC1h 25m
2026-07-16 KAL2156 - Jul 16, 10:59 UTCJul 16, 12:05 UTC1h 5m
2026-07-16 KAL2155 - Jul 16, 08:40 UTCJul 16, 09:45 UTC1h 5m
2026-07-16 KAL2192 - Jul 16, 04:25 UTCJul 16, 05:25 UTC1h 0m
2026-07-16 KAL2191 - Jul 16, 01:55 UTCJul 16, 02:50 UTC55m
2026-07-15 KAL2186 - Jul 15, 04:40 UTCJul 15, 05:50 UTC1h 10m
2026-07-15 KAL2185 - Jul 15, 01:55 UTCJul 15, 03:00 UTC1h 5m
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

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?
Yes. Mode-S 71C091 is currently airborne.
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.