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
344
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 - 43 2026-06-30
KAL2155 - 43 2026-06-30
KAL2186 - 24 2026-06-29
KAL2185 - 24 2026-06-29
KAL2189 - 21 2026-06-23
KAL2190 - 20 2026-06-24
KAL2031 Korean Air 19 2026-05-27
KAL2032 Korean Air 18 2026-05-27
KAL2192 - 16 2026-06-30
KAL2191 - 15 2026-06-30
KAL1214 - 6 2026-07-13
KAL1019 - 5 2026-07-13
KAL1806 - 4 2026-07-13
KAL1803 - 4 2026-07-12
KAL1725 - 4 2026-07-10
KAL1722 - 4 2026-07-10
KAL1608 - 4 2026-07-14
KAL1607 - 4 2026-07-14
KAL1596 - 4 2026-07-14
KAL1595 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL1595 - Jul 14, 06:10 UTCJul 14, 06:30 UTC20m
2026-07-14 KAL1596 - Jul 14, 04:35 UTCJul 14, 04:50 UTC15m
2026-07-14 KAL1607 - Jul 14, 02:35 UTCJul 14, 02:45 UTC10m
2026-07-14 KAL1608 - Jul 14, 00:45 UTCJul 14, 01:20 UTC35m
2026-07-13 KAL1019 - Jul 13, 22:30 UTCJul 13, 23:05 UTC35m
2026-07-13 KAL1328 - Jul 13, 12:35 UTCJul 13, 13:15 UTC40m
2026-07-13 KAL1205 - Jul 13, 10:30 UTCJul 13, 11:05 UTC35m
2026-07-13 KAL1214 - Jul 13, 04:30 UTCJul 13, 05:15 UTC45m
2026-07-13 KAL1079 - Jul 13, 01:50 UTCJul 13, 02:25 UTC35m
2026-07-13 KAL1806 PUS → GMP Jul 13, 00:01 UTCJul 13, 00:45 UTC45m
2026-07-12 KAL1803 GMP → PUS Jul 12, 22:15 UTCJul 12, 22:55 UTC40m
2026-07-12 KAL1272 - Jul 12, 09:00 UTCJul 12, 09:35 UTC35m
2026-07-12 KAL1595 - Jul 12, 06:55 UTCJul 12, 07:15 UTC20m
2026-07-12 KAL1596 - Jul 12, 05:15 UTCJul 12, 05:30 UTC15m
2026-07-12 KAL1079 - Jul 12, 01:55 UTCJul 12, 02:30 UTC35m
2026-07-12 KAL1806 PUS → GMP Jul 12, 00:05 UTCJul 12, 00:50 UTC45m
2026-07-11 KAL1803 GMP → PUS Jul 11, 22:10 UTCJul 11, 22:55 UTC45m
2026-07-11 KAL1814 PUS → GMP Jul 11, 03:25 UTCJul 11, 04:01 UTC35m
2026-07-11 KAL1811 GMP → PUS Jul 11, 01:45 UTCJul 11, 02:25 UTC40m
2026-07-11 KAL1136 - Jul 11, 00:10 UTCJul 11, 00:50 UTC40m
2026-07-10 KAL1007 - Jul 10, 21:45 UTCJul 10, 22:15 UTC30m
2026-07-10 KAL1314 - Jul 10, 11:25 UTCJul 10, 12:05 UTC40m
2026-07-10 KAL1725 - Jul 10, 08:45 UTCJul 10, 09:15 UTC30m
2026-07-10 KAL1722 - Jul 10, 06:25 UTCJul 10, 07:00 UTC35m
2026-07-10 KAL1707 - Jul 10, 00:35 UTCJul 10, 01:05 UTC30m
2026-07-09 KAL1704 - Jul 9, 22:45 UTCJul 9, 23:15 UTC30m
2026-07-09 KAL1561 - Jul 9, 12:25 UTCJul 9, 12:35 UTC10m
2026-07-09 KAL1554 - Jul 9, 11:00 UTCJul 9, 11:30 UTC30m
2026-07-09 KAL1725 - Jul 9, 08:40 UTCJul 9, 09:10 UTC30m
2026-07-09 KAL1722 - Jul 9, 07:05 UTCJul 9, 07:35 UTC30m
2026-07-09 KAL1607 - Jul 9, 01:45 UTCJul 9, 02:00 UTC15m
2026-07-09 KAL1608 - Jul 9, 00:40 UTCJul 9, 00:50 UTC10m
2026-07-08 KAL1019 - Jul 8, 22:30 UTCJul 8, 23:10 UTC40m
2026-07-08 KAL1328 - Jul 8, 12:05 UTCJul 8, 12:45 UTC40m
2026-07-08 KAL1205 - Jul 8, 10:05 UTCJul 8, 10:45 UTC40m
2026-07-08 KAL1268 - Jul 8, 08:20 UTCJul 8, 09:05 UTC45m
2026-07-08 KAL1595 - Jul 8, 06:10 UTCJul 8, 06:25 UTC15m
2026-07-08 KAL1596 - Jul 8, 04:50 UTCJul 8, 05:00 UTC10m
2026-07-08 KAL1607 - Jul 8, 01:50 UTCJul 8, 02:05 UTC15m
2026-07-08 KAL1608 - Jul 8, 00:40 UTCJul 8, 00:50 UTC10m
2026-07-07 KAL1019 GMP → CJU Jul 7, 22:30 UTCJul 7, 23:10 UTC40m
2026-07-07 KAL1314 - Jul 7, 11:15 UTCJul 7, 12:00 UTC45m
2026-07-07 KAL1725 - Jul 7, 08:30 UTCJul 7, 09:05 UTC35m
2026-07-07 KAL1722 - Jul 7, 06:10 UTCJul 7, 06:40 UTC30m
2026-07-07 KAL1611 - Jul 7, 04:20 UTCJul 7, 04:30 UTC10m
2026-07-07 KAL1610 - Jul 7, 03:10 UTCJul 7, 03:25 UTC15m
2026-07-07 KAL1515 - Jul 7, 01:15 UTCJul 7, 01:35 UTC20m
2026-07-06 KAL1807 GMP → PUS Jul 6, 23:35 UTCJul 7, 00:15 UTC40m
2026-07-05 KAL1214 - Jul 5, 04:35 UTCJul 5, 05:15 UTC40m
2026-07-05 KAL1607 KWJ → CJU Jul 5, 02:00 UTCJul 5, 02:10 UTC10m

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, KAL2186, KAL2185, KAL2189.