Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C311

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

Currently assigned to HL8311 · AIRBUS A220-300

Hex
71C311
Octal
34341421
Decimal
7,455,505
Country
KR
Tail
HL8311
Type
BCS3
No current signal · last broadcast 3h ago
Flights observed
186
Distinct callsigns
20
Country
KR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 71C311.

Country allocation

The ICAO 24-bit address 71C311 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
KAL2156 Korean Air 23 2026-05-29
KAL2155 Korean Air 23 2026-05-30
KAL2031 Korean Air 19 2026-05-27
KAL2032 Korean Air 18 2026-05-27
KAL2186 Korean Air 16 2026-05-29
KAL2189 Korean Air 15 2026-05-26
KAL2185 Korean Air 15 2026-05-29
KAL2190 Korean Air 14 2026-05-27
KAL2192 Korean Air 9 2026-05-26
KAL2191 Korean Air 8 2026-05-30
KAL1844 Korean Air 3 2026-04-16
KAL1214 Korean Air 3 2026-04-15
KAL1075 Korean Air 3 2026-04-16
KAL1843 Korean Air 2 2026-04-15
KAL1328 - 2 2026-04-13
KAL193P Korean Air 1 2026-04-16
KAL1848 Korean Air 1 2026-04-16
KAL1847 Korean Air 1 2026-04-16
KAL1717 - 1 2026-04-14
KAL1620 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KAL2191 ICN → NGS May 30, 01:55 UTCMay 30, 02:20 UTC25m
2026-05-30 KAL2155 ICN → KMJ May 30, 00:10 UTCMay 30, 00:15 UTC5m
2026-05-29 KAL2156 KMJ → ICN May 29, 10:55 UTCMay 29, 12:00 UTC1h 5m
2026-05-29 KAL2155 ICN → KMJ May 29, 08:30 UTCMay 29, 09:30 UTC1h 0m
2026-05-29 KAL2186 OKJ → ICN May 29, 04:35 UTCMay 29, 05:55 UTC1h 20m
2026-05-29 KAL2185 ICN → OKJ May 29, 02:10 UTCMay 29, 03:10 UTC1h 0m
2026-05-28 KAL2156 KMJ → ICN May 28, 10:55 UTCMay 28, 12:00 UTC1h 5m
2026-05-28 KAL2155 ICN → KMJ May 28, 08:20 UTCMay 28, 09:20 UTC1h 0m
2026-05-28 KAL2191 ICN → NGS May 28, 01:55 UTCMay 28, 05:30 UTC3h 35m
2026-05-27 KAL2032 RMQ → ICN May 27, 10:05 UTCMay 27, 12:20 UTC2h 15m
2026-05-27 KAL2031 ICN → RMQ May 27, 06:09 UTCMay 27, 08:20 UTC2h 11m
2026-05-27 KAL2190 KMQ → ICN May 27, 01:24 UTCMay 27, 02:54 UTC1h 30m
2026-05-26 KAL2189 ICN → KMQ May 26, 22:54 UTCMay 27, 00:04 UTC1h 10m
2026-05-26 KAL2156 KMJ → ICN May 26, 10:50 UTCMay 26, 11:54 UTC1h 5m
2026-05-26 KAL2155 ICN → KMJ May 26, 08:24 UTCMay 26, 09:25 UTC1h 0m
2026-05-26 KAL2192 NGS → ICN May 26, 04:39 UTCMay 26, 05:34 UTC55m
2026-05-26 KAL2191 ICN → NGS May 26, 02:00 UTCMay 26, 02:29 UTC30m
2026-05-25 KAL2156 KMJ → ICN May 25, 10:55 UTCMay 25, 12:00 UTC1h 5m
2026-05-25 KAL2155 ICN → KMJ May 25, 08:25 UTCMay 25, 09:25 UTC1h 0m
2026-05-25 KAL2186 OKJ → ICN May 25, 04:25 UTCMay 25, 05:40 UTC1h 15m
2026-05-25 KAL2185 ICN → OKJ May 25, 01:55 UTCMay 25, 02:55 UTC1h 0m
2026-05-24 KAL2186 OKJ → ICN May 24, 04:30 UTCMay 24, 05:40 UTC1h 10m
2026-05-24 KAL2185 ICN → OKJ May 24, 02:05 UTCMay 24, 03:05 UTC1h 0m
2026-05-23 KAL2032 RMQ → ICN May 23, 09:50 UTCMay 23, 12:05 UTC2h 15m
2026-05-23 KAL2031 ICN → RMQ May 23, 06:00 UTCMay 23, 08:05 UTC2h 5m
2026-05-23 KAL2190 KMQ → ICN May 23, 01:35 UTCMay 23, 03:05 UTC1h 29m
2026-05-22 KAL2189 ICN → KMQ May 22, 22:50 UTCMay 22, 23:55 UTC1h 5m
2026-05-22 KAL2032 RMQ → ICN May 22, 10:05 UTCMay 22, 12:15 UTC2h 10m
2026-05-22 KAL2031 ICN → RMQ May 22, 05:55 UTCMay 22, 08:15 UTC2h 20m
2026-05-21 KAL2032 RMQ → ICN May 21, 10:00 UTCMay 21, 12:05 UTC2h 5m
2026-05-21 KAL2031 ICN → RMQ May 21, 06:00 UTCMay 21, 08:15 UTC2h 15m
2026-05-21 KAL2190 KMQ → ICN May 21, 01:35 UTCMay 21, 03:05 UTC1h 30m
2026-05-20 KAL2189 ICN → KMQ May 20, 22:55 UTCMay 21, 00:00 UTC1h 5m
2026-05-20 KAL2032 RMQ → ICN May 20, 10:00 UTCMay 20, 12:20 UTC2h 20m
2026-05-20 KAL2031 ICN → RMQ May 20, 06:10 UTCMay 20, 08:20 UTC2h 10m
2026-05-20 KAL2190 KMQ → ICN May 20, 01:30 UTCMay 20, 02:55 UTC1h 25m
2026-05-19 KAL2189 ICN → KMQ May 19, 22:50 UTCMay 19, 23:55 UTC1h 5m
2026-05-19 KAL2032 RMQ → ICN May 19, 09:55 UTCMay 19, 12:10 UTC2h 15m
2026-05-19 KAL2031 ICN → RMQ May 19, 08:00 UTCMay 19, 08:15 UTC15m
2026-05-19 KAL2031 ICN → RMQ May 19, 06:15 UTCMay 19, 06:45 UTC30m
2026-05-19 KAL2190 KMQ → ICN May 19, 01:35 UTCMay 19, 02:55 UTC1h 20m
2026-05-18 KAL2189 ICN → KMQ May 18, 22:50 UTCMay 19, 00:00 UTC1h 10m
2026-05-18 KAL2156 KMJ → ICN May 18, 11:15 UTCMay 18, 12:15 UTC1h 0m
2026-05-18 KAL2155 ICN → KMJ May 18, 08:35 UTCMay 18, 09:05 UTC30m
2026-05-18 KAL2186 OKJ → ICN May 18, 04:25 UTCMay 18, 05:30 UTC1h 5m
2026-05-18 KAL2185 ICN → OKJ May 18, 02:00 UTCMay 18, 03:10 UTC1h 10m
2026-05-18 KAL2185 ICN → OKJ May 18, 01:45 UTCMay 18, 01:50 UTC5m
2026-05-17 KAL2156 KMJ → ICN May 17, 10:55 UTCMay 17, 11:55 UTC1h 0m
2026-05-17 KAL2155 ICN → KMJ May 17, 08:20 UTCMay 17, 09:20 UTC1h 0m
2026-05-17 KAL2186 OKJ → ICN May 17, 04:35 UTCMay 17, 05:45 UTC1h 10m

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 HL8311 page for operator, model, and routing details .

Mode-S 71C311 frequently asked

What is Mode-S code 71C311?
71C311 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8311.
Where is Mode-S 71C311 registered?
Mode-S code 71C311 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 71C311 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C311, octal 34341421, decimal 7,455,505.
What flights does 71C311 operate?
Mode-S 71C311 has broadcast 20 distinct callsigns, including KAL2156, KAL2155, KAL2031, KAL2032, KAL2186.