Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF16

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

Currently assigned to HL7716 · BOEING 737-900

Hex
71BF16
Octal
34337426
Decimal
7,454,486
Country
KR
Tail
HL7716
Type
B739
No current signal · last broadcast Jul 26, 06:20 UTC
Flights observed
437
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 06:20 UTC

Last known position

Most recent position reported by Mode-S 71BF16.

Country allocation

The ICAO 24-bit address 71BF16 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
KAL1023 - 18 2026-07-19
KAL1330 Korean Air 17 2026-07-20
KAL1227 Korean Air 16 2026-07-23
KAL1114 - 16 2026-07-23
KAL1326 - 15 2026-07-25
KAL1238 Korean Air 15 2026-07-24
KAL1165 Korean Air 15 2026-07-24
KAL1073 Korean Air 15 2026-07-23
KAL1049 Korean Air 15 2026-07-24
KAL1570 - 14 2026-07-20
KAL1294 - 14 2026-07-23
KAL1178 Korean Air 14 2026-07-24
KAL1107 Korean Air 14 2026-07-24
KAL1613 Korean Air 12 2026-07-26
KAL1118 - 12 2026-07-22
KAL1575 - 11 2026-07-20
KAL1569 - 10 2026-07-20
KAL1017 Korean Air 10 2026-07-25
KAL2126 - 9 2026-07-17
KAL2125 Korean Air 9 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL1613 KWJ → CJU Jul 26, 06:10 UTCJul 26, 06:20 UTC10m
2026-07-26 KAL1612 CJU → KWJ Jul 26, 04:50 UTCJul 26, 05:00 UTC10m
2026-07-26 KAL1081 GMP → CJU Jul 26, 02:25 UTCJul 26, 02:55 UTC30m
2026-07-26 KAL1150 CJU → GMP Jul 26, 00:30 UTCJul 26, 01:10 UTC40m
2026-07-25 KAL1017 GMP → CJU Jul 25, 22:30 UTCJul 25, 23:00 UTC30m
2026-07-25 KAL1326 - Jul 25, 11:50 UTCJul 25, 12:30 UTC40m
2026-07-25 KAL1185 GMP → CJU Jul 25, 09:05 UTCJul 25, 09:35 UTC30m
2026-07-25 KAL1240 CJU → GMP Jul 25, 06:40 UTCJul 25, 07:25 UTC45m
2026-07-25 KAL1709 CJJ → CJU Jul 25, 02:35 UTCJul 25, 03:00 UTC25m
2026-07-25 KAL1708 CJU → CJJ Jul 25, 00:30 UTCJul 25, 01:00 UTC30m
2026-07-24 KAL1017 GMP → CJU Jul 24, 22:20 UTCJul 24, 22:55 UTC35m
2026-07-24 KAL1326 - Jul 24, 11:45 UTCJul 24, 12:30 UTC45m
2026-07-24 KAL1165 GMP → CJU Jul 24, 08:05 UTCJul 24, 08:35 UTC30m
2026-07-24 KAL1238 CJU → GMP Jul 24, 06:15 UTCJul 24, 07:00 UTC45m
2026-07-24 KAL1107 GMP → CJU Jul 24, 04:05 UTCJul 24, 04:40 UTC35m
2026-07-24 KAL1178 CJU → GMP Jul 24, 02:20 UTCJul 24, 03:00 UTC40m
2026-07-24 KAL1049 GMP → CJU Jul 24, 00:05 UTCJul 24, 00:40 UTC35m
2026-07-23 KAL1114 - Jul 23, 22:10 UTCJul 23, 22:55 UTC45m
2026-07-23 KAL1227 GMP → CJU Jul 23, 11:50 UTCJul 23, 12:25 UTC35m
2026-07-23 KAL1294 - Jul 23, 10:00 UTCJul 23, 10:40 UTC40m
2026-07-23 KAL1147 - Jul 23, 06:50 UTCJul 23, 07:25 UTC35m
2026-07-23 KAL1218 CJU → GMP Jul 23, 05:05 UTCJul 23, 05:40 UTC35m
2026-07-23 KAL1073 GMP → CJU Jul 23, 01:25 UTCJul 23, 02:00 UTC35m
2026-07-22 KAL1118 - Jul 22, 22:25 UTCJul 22, 23:10 UTC45m
2026-07-22 KAL2125 CJU → NRT Jul 22, 04:20 UTCJul 22, 11:20 UTC7h 0m
2026-07-22 KAL1073 GMP → CJU Jul 22, 01:25 UTCJul 22, 02:00 UTC35m
2026-07-21 KAL1118 - Jul 21, 22:25 UTCJul 21, 23:05 UTC40m
2026-07-21 KAL1227 GMP → CJU Jul 21, 11:50 UTCJul 21, 12:25 UTC35m
2026-07-21 KAL1294 - Jul 21, 09:55 UTCJul 21, 10:35 UTC40m
2026-07-21 KAL1147 - Jul 21, 06:40 UTCJul 21, 07:15 UTC35m
2026-07-21 KAL1218 CJU → GMP Jul 21, 04:50 UTCJul 21, 05:35 UTC45m
2026-07-21 KAL1709 - Jul 21, 02:30 UTCJul 21, 03:00 UTC30m
2026-07-21 KAL1708 - Jul 21, 00:40 UTCJul 21, 01:10 UTC30m
2026-07-20 KAL1017 - Jul 20, 22:20 UTCJul 20, 22:55 UTC35m
2026-07-20 KAL1330 CJU → GMP Jul 20, 12:20 UTCJul 20, 13:00 UTC40m
2026-07-20 KAL1575 - Jul 20, 09:50 UTCJul 20, 10:05 UTC15m
2026-07-20 KAL1576 - Jul 20, 08:00 UTCJul 20, 08:30 UTC30m
2026-07-20 KAL1613 KWJ → CJU Jul 20, 05:55 UTCJul 20, 06:05 UTC10m
2026-07-20 KAL1612 - Jul 20, 04:40 UTCJul 20, 04:50 UTC10m
2026-07-20 KAL1569 - Jul 20, 02:20 UTCJul 20, 02:35 UTC15m
2026-07-20 KAL1570 - Jul 20, 00:50 UTCJul 20, 01:15 UTC25m
2026-07-19 KAL1023 - Jul 19, 22:45 UTCJul 19, 23:20 UTC35m
2026-07-19 KAL1294 - Jul 19, 09:40 UTCJul 19, 10:15 UTC35m
2026-07-19 KAL1081 - Jul 19, 02:30 UTCJul 19, 03:00 UTC30m
2026-07-19 KAL1150 - Jul 19, 00:30 UTCJul 19, 01:10 UTC40m
2026-07-18 KAL1017 - Jul 18, 22:25 UTCJul 18, 23:00 UTC35m
2026-07-18 KAL1330 CJU → GMP Jul 18, 12:20 UTCJul 18, 12:55 UTC35m
2026-07-18 KAL1575 - Jul 18, 09:55 UTCJul 18, 10:05 UTC10m
2026-07-18 KAL1576 - Jul 18, 08:05 UTCJul 18, 08:30 UTC25m
2026-07-18 KAL1613 - Jul 18, 05:50 UTCJul 18, 06:00 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 HL7716 page for operator, model, and routing details .

Mode-S 71BF16 frequently asked

What is Mode-S code 71BF16?
71BF16 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7716.
Where is Mode-S 71BF16 registered?
Mode-S code 71BF16 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 71BF16 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 06:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF16, octal 34337426, decimal 7,454,486.
What flights does 71BF16 operate?
Mode-S 71BF16 has broadcast 20 distinct callsigns, including KAL1023, KAL1330, KAL1227, KAL1114, KAL1326.