Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF07

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

Currently assigned to HL7707 · BOEING 737-900

Hex
71BF07
Octal
34337407
Decimal
7,454,471
Country
KR
Tail
HL7707
Type
B739
No current signal · last broadcast 1d ago
Flights observed
81
Distinct callsigns
20
Country
KR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 71BF07.

Country allocation

The ICAO 24-bit address 71BF07 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
KAL1404 Korean Air 4 2026-05-02
KAL1227 Korean Air 4 2026-04-30
KAL1613 Korean Air 3 2026-04-27
KAL1409 Korean Air 3 2026-04-23
KAL1330 Korean Air 3 2026-04-29
KAL1294 Korean Air 3 2026-04-30
KAL1264 Korean Air 3 2026-04-27
KAL1218 Korean Air 3 2026-04-30
KAL1133 Korean Air 3 2026-05-01
KAL1017 Korean Air 3 2026-04-27
KAL844 Korean Air 2 2026-04-22
KAL843 Korean Air 2 2026-04-21
KAL1709 Korean Air 2 2026-04-28
KAL1708 Korean Air 2 2026-04-28
KAL1614 Korean Air 2 2026-04-27
KAL1570 Korean Air 2 2026-04-30
KAL1206 Korean Air 2 2026-05-01
KAL1195 Korean Air 2 2026-04-27
KAL1178 Korean Air 2 2026-04-29
KAL1147 Korean Air 2 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 KAL200P - May 29, 04:40 UTCMay 29, 05:00 UTC20m
2026-05-03 KAL299F - May 3, 21:29 UTCMay 3, 23:04 UTC1h 35m
2026-05-03 KAL156 HFE → ICN May 3, 04:45 UTCMay 3, 10:20 UTC5h 35m
2026-05-02 KAL1404 PUS → ICN May 2, 23:35 UTCMay 3, 00:05 UTC30m
2026-05-02 KAL2062 PEK → PUS May 2, 19:30 UTCMay 2, 21:00 UTC1h 30m
2026-05-02 KAL2061 PUS → PEK May 2, 13:30 UTCMay 2, 14:05 UTC35m
2026-05-02 KAL2073 PUS → PVG May 2, 00:00 UTCMay 2, 07:20 UTC7h 20m
2026-05-01 KAL1133 GMP → CJU May 1, 05:30 UTCMay 1, 06:05 UTC35m
2026-05-01 KAL1206 CJU → GMP May 1, 03:35 UTCMay 1, 04:20 UTC45m
2026-05-01 KAL1073 GMP → CJU May 1, 01:25 UTCMay 1, 01:55 UTC30m
2026-04-30 KAL1118 CJU → GMP Apr 30, 22:30 UTCApr 30, 23:10 UTC40m
2026-04-30 KAL1227 GMP → CJU Apr 30, 11:45 UTCApr 30, 12:20 UTC35m
2026-04-30 KAL1294 CJU → GMP Apr 30, 09:35 UTCApr 30, 10:10 UTC35m
2026-04-30 KAL1147 GMP → CJU Apr 30, 06:45 UTCApr 30, 07:20 UTC35m
2026-04-30 KAL1218 CJU → GMP Apr 30, 05:00 UTCApr 30, 05:35 UTC35m
2026-04-30 KAL1570 CJU → TAE Apr 30, 01:30 UTCApr 30, 01:40 UTC10m
2026-04-29 KAL1023 GMP → CJU Apr 29, 22:50 UTCApr 29, 23:25 UTC34m
2026-04-29 KAL1330 CJU → GMP Apr 29, 12:15 UTCApr 29, 12:55 UTC40m
2026-04-29 KAL1165 GMP → CJU Apr 29, 08:05 UTCApr 29, 08:40 UTC35m
2026-04-29 KAL1238 CJU → GMP Apr 29, 06:15 UTCApr 29, 06:49 UTC35m
2026-04-29 KAL1107 GMP → CJU Apr 29, 04:15 UTCApr 29, 04:44 UTC30m
2026-04-29 KAL1178 CJU → GMP Apr 29, 02:30 UTCApr 29, 03:04 UTC35m
2026-04-29 KAL1049 GMP → CJU Apr 29, 00:10 UTCApr 29, 00:45 UTC35m
2026-04-28 KAL1114 CJU → GMP Apr 28, 22:20 UTCApr 28, 23:00 UTC40m
2026-04-28 KAL1185 GMP → CJU Apr 28, 09:00 UTCApr 28, 09:35 UTC35m
2026-04-28 KAL1240 CJU → GMP Apr 28, 06:35 UTCApr 28, 07:15 UTC40m
2026-04-28 KAL1709 CJJ → CJU Apr 28, 02:25 UTCApr 28, 02:55 UTC30m
2026-04-28 KAL1708 CJU → CJJ Apr 28, 00:40 UTCApr 28, 01:05 UTC25m
2026-04-27 KAL1017 GMP → CJU Apr 27, 22:25 UTCApr 27, 23:00 UTC35m
2026-04-27 KAL1326 CJU → GMP Apr 27, 12:25 UTCApr 27, 13:00 UTC35m
2026-04-27 KAL1195 GMP → CJU Apr 27, 10:10 UTCApr 27, 10:45 UTC35m
2026-04-27 KAL1264 CJU → GMP Apr 27, 08:15 UTCApr 27, 08:55 UTC40m
2026-04-27 KAL1613 KWJ → CJU Apr 27, 06:10 UTCApr 27, 06:20 UTC10m
2026-04-27 KAL1614 CJU → KWJ Apr 27, 04:55 UTCApr 27, 05:05 UTC10m
2026-04-27 KAL1081 GMP → CJU Apr 27, 02:40 UTCApr 27, 03:15 UTC35m
2026-04-26 KAL1330 CJU → GMP Apr 26, 12:20 UTCApr 26, 13:00 UTC40m
2026-04-26 KAL1195 GMP → CJU Apr 26, 09:50 UTCApr 26, 10:20 UTC30m
2026-04-26 KAL1264 CJU → GMP Apr 26, 08:05 UTCApr 26, 08:40 UTC35m
2026-04-26 KAL1613 KWJ → CJU Apr 26, 06:00 UTCApr 26, 06:15 UTC15m
2026-04-26 KAL1614 CJU → KWJ Apr 26, 04:45 UTCApr 26, 04:55 UTC10m
2026-04-26 KAL1081 GMP → CJU Apr 26, 02:25 UTCApr 26, 03:00 UTC35m
2026-04-26 KAL1150 CJU → GMP Apr 26, 00:30 UTCApr 26, 01:05 UTC35m
2026-04-25 KAL1017 GMP → CJU Apr 25, 22:20 UTCApr 25, 22:55 UTC35m
2026-04-25 KAL1264 CJU → GMP Apr 25, 07:55 UTCApr 25, 08:30 UTC35m
2026-04-25 KAL1613 KWJ → CJU Apr 25, 06:10 UTCApr 25, 06:25 UTC15m
2026-04-23 KAL1409 ICN → PUS Apr 23, 11:10 UTCApr 23, 11:35 UTC25m
2026-04-22 KAL844 TAO → ICN Apr 22, 04:40 UTCApr 22, 09:00 UTC4h 20m
2026-04-21 KAL1404 PUS → ICN Apr 21, 23:20 UTCApr 21, 23:50 UTC30m
2026-04-21 KAL1409 ICN → PUS Apr 21, 10:50 UTCApr 21, 11:15 UTC25m
2026-04-21 KAL843 ICN → TAO Apr 21, 04:45 UTCApr 21, 08:20 UTC3h 35m

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 HL7707 page for operator, model, and routing details .

Mode-S 71BF07 frequently asked

What is Mode-S code 71BF07?
71BF07 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7707.
Where is Mode-S 71BF07 registered?
Mode-S code 71BF07 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 71BF07 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF07, octal 34337407, decimal 7,454,471.
What flights does 71BF07 operate?
Mode-S 71BF07 has broadcast 20 distinct callsigns, including KAL1404, KAL1227, KAL1613, KAL1409, KAL1330.