Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF06

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

Currently assigned to HL7706 · BOEING 737-900

Hex
71BF06
Octal
34337406
Decimal
7,454,470
Country
KR
Tail
HL7706
Type
B739
No current signal · last broadcast Jul 25, 13:05 UTC
Flights observed
456
Distinct callsigns
20
Country
KR
Last broadcast
Jul 25, 13:05 UTC

Last known position

Most recent position reported by Mode-S 71BF06.

Country allocation

The ICAO 24-bit address 71BF06 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
KAL1409 - 20 2026-07-18
KAL2062 - 19 2026-07-18
KAL1404 - 19 2026-07-17
KAL844 - 16 2026-07-15
KAL843 - 16 2026-07-15
KAL2061 - 16 2026-07-18
KAL1195 - 16 2026-07-20
KAL1330 Korean Air 15 2026-07-25
KAL1264 - 15 2026-07-20
KAL2072 - 13 2026-07-19
KAL2071 - 13 2026-07-18
KAL1118 - 13 2026-07-23
KAL1073 Korean Air 13 2026-07-25
KAL1206 - 12 2026-07-20
KAL1227 Korean Air 11 2026-07-22
KAL1326 - 10 2026-07-20
KAL1238 - 10 2026-07-23
KAL1178 Korean Air 10 2026-07-23
KAL1107 Korean Air 10 2026-07-23
KAL1165 - 9 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 KAL1330 CJU → GMP Jul 25, 12:20 UTCJul 25, 13:00 UTC40m
2026-07-25 KAL1575 TAE → CJU Jul 25, 10:00 UTCJul 25, 10:15 UTC15m
2026-07-25 KAL1576 CJU → TAE Jul 25, 08:10 UTCJul 25, 08:30 UTC20m
2026-07-25 KAL1612 CJU → KWJ Jul 25, 04:35 UTCJul 25, 04:50 UTC15m
2026-07-25 KAL1073 GMP → CJU Jul 25, 01:30 UTCJul 25, 02:05 UTC35m
2026-07-24 KAL1330 CJU → GMP Jul 24, 12:15 UTCJul 24, 12:55 UTC40m
2026-07-24 KAL2126 NRT → CJU Jul 24, 07:40 UTCJul 24, 09:20 UTC1h 40m
2026-07-24 KAL2125 CJU → NRT Jul 24, 04:20 UTCJul 24, 06:10 UTC1h 50m
2026-07-24 KAL1073 GMP → CJU Jul 24, 01:25 UTCJul 24, 01:55 UTC30m
2026-07-23 KAL1118 - Jul 23, 22:20 UTCJul 23, 23:05 UTC45m
2026-07-23 KAL1165 - Jul 23, 08:10 UTCJul 23, 08:40 UTC30m
2026-07-23 KAL1238 - Jul 23, 06:15 UTCJul 23, 06:55 UTC40m
2026-07-23 KAL1107 GMP → CJU Jul 23, 04:10 UTCJul 23, 04:45 UTC35m
2026-07-23 KAL1178 CJU → GMP Jul 23, 02:20 UTCJul 23, 03:00 UTC40m
2026-07-23 KAL1049 - Jul 23, 00:15 UTCJul 23, 00:45 UTC30m
2026-07-22 KAL1114 - Jul 22, 22:25 UTCJul 22, 23:05 UTC40m
2026-07-22 KAL1227 GMP → CJU Jul 22, 11:45 UTCJul 22, 12:20 UTC35m
2026-07-22 KAL1569 TAE → CJU Jul 22, 02:20 UTCJul 22, 02:35 UTC15m
2026-07-22 KAL1570 - Jul 22, 00:55 UTCJul 22, 01:10 UTC15m
2026-07-21 KAL1023 - Jul 21, 22:45 UTCJul 21, 23:20 UTC35m
2026-07-21 KAL1330 CJU → GMP Jul 21, 12:10 UTCJul 21, 12:50 UTC40m
2026-07-21 KAL1575 - Jul 21, 09:55 UTCJul 21, 10:10 UTC15m
2026-07-21 KAL1576 - Jul 21, 08:15 UTCJul 21, 08:35 UTC20m
2026-07-21 KAL1612 - Jul 21, 04:45 UTCJul 21, 05:00 UTC15m
2026-07-21 KAL1569 - Jul 21, 02:20 UTCJul 21, 02:35 UTC15m
2026-07-21 KAL1570 - Jul 21, 01:00 UTCJul 21, 01:25 UTC25m
2026-07-20 KAL1023 - Jul 20, 22:40 UTCJul 20, 23:15 UTC35m
2026-07-20 KAL1326 - Jul 20, 12:25 UTCJul 20, 13:05 UTC40m
2026-07-20 KAL1195 - Jul 20, 10:05 UTCJul 20, 10:40 UTC35m
2026-07-20 KAL1264 - Jul 20, 08:20 UTCJul 20, 09:00 UTC40m
2026-07-20 KAL1141 - Jul 20, 05:50 UTCJul 20, 06:25 UTC35m
2026-07-20 KAL1206 - Jul 20, 04:00 UTCJul 20, 04:35 UTC35m
2026-07-20 KAL1517 PUS → CJU Jul 20, 02:00 UTCJul 20, 02:10 UTC10m
2026-07-20 KAL1512 - Jul 20, 00:20 UTCJul 20, 00:55 UTC35m
2026-07-19 KAL1505 - Jul 19, 22:10 UTCJul 19, 22:20 UTC10m
2026-07-19 KAL2072 - Jul 19, 04:25 UTCJul 19, 04:40 UTC15m
2026-07-18 KAL2071 - Jul 18, 23:45 UTCJul 19, 00:10 UTC25m
2026-07-18 KAL2062 - Jul 18, 20:30 UTCJul 18, 21:30 UTC1h 0m
2026-07-18 KAL2062 - Jul 18, 19:40 UTCJul 18, 19:55 UTC15m
2026-07-18 KAL2061 - Jul 18, 13:25 UTCJul 18, 14:20 UTC55m
2026-07-18 KAL1409 ICN → PUS Jul 18, 10:55 UTCJul 18, 11:40 UTC45m
2026-07-17 KAL1404 - Jul 17, 23:14 UTCJul 18, 00:04 UTC50m
2026-07-17 KAL2062 - Jul 17, 20:25 UTCJul 17, 21:30 UTC1h 5m
2026-07-17 KAL2062 - Jul 17, 19:30 UTCJul 17, 19:40 UTC10m
2026-07-17 KAL2061 - Jul 17, 13:45 UTCJul 17, 14:39 UTC55m
2026-07-17 KAL2072 - Jul 17, 05:04 UTCJul 17, 05:20 UTC15m
2026-07-16 KAL2071 - Jul 16, 23:55 UTCJul 17, 00:10 UTC15m
2026-07-16 KAL2074 - Jul 16, 11:40 UTCJul 16, 12:00 UTC20m
2026-07-16 KAL2073 - Jul 16, 07:05 UTCJul 16, 07:25 UTC20m
2026-07-16 KAL2072 - Jul 16, 04:45 UTCJul 16, 05:05 UTC20m

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 HL7706 page for operator, model, and routing details .

Mode-S 71BF06 frequently asked

What is Mode-S code 71BF06?
71BF06 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7706.
Where is Mode-S 71BF06 registered?
Mode-S code 71BF06 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 71BF06 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 13:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF06, octal 34337406, decimal 7,454,470.
What flights does 71BF06 operate?
Mode-S 71BF06 has broadcast 20 distinct callsigns, including KAL1409, KAL2062, KAL1404, KAL844, KAL843.