Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF44

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

Currently assigned to HL7744 · AIRBUS A-320

Hex
71BF44
Octal
34337504
Decimal
7,454,532
Country
KR
Tail
HL7744
Type
A320
No current signal · last broadcast 16h ago
Flights observed
128
Distinct callsigns
20
Country
KR
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 71BF44.

Country allocation

The ICAO 24-bit address 71BF44 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
ABL8802 Air Busan 15 2026-05-26
ABL8813 Air Busan 14 2026-05-27
ABL8806 Air Busan 12 2026-05-27
ABL8024 Air Busan 11 2026-05-29
ABL8807 Air Busan 10 2026-05-24
ABL8827 Air Busan 9 2026-05-25
ABL8816 Air Busan 9 2026-05-25
ABL8822 Air Busan 8 2026-05-25
ABL8821 Air Busan 7 2026-05-25
ABL8818 Air Busan 4 2026-05-29
ABL8817 Air Busan 4 2026-05-29
ABL8019 Air Busan 4 2026-05-29
ABL8013 Air Busan 4 2026-05-18
ABL8808 Air Busan 3 2026-05-17
ABL8025 Air Busan 3 2026-05-21
ABL322 Air Busan 3 2026-05-26
ABL8809 Air Busan 2 2026-05-17
ABL8804 Air Busan 2 2026-05-17
ABL321 Air Busan 2 2026-05-04
ABL134 Air Busan 1 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ABL8024 CJU → GMP May 29, 11:10 UTCMay 29, 11:40 UTC30m
2026-05-29 ABL8019 GMP → CJU May 29, 08:55 UTCMay 29, 09:20 UTC25m
2026-05-29 ABL8818 PUS → GMP May 29, 07:20 UTCMay 29, 07:55 UTC35m
2026-05-29 ABL8817 GMP → PUS May 29, 05:40 UTCMay 29, 06:05 UTC25m
2026-05-27 ABL8813 GMP → PUS May 27, 03:54 UTCMay 27, 04:19 UTC25m
2026-05-27 ABL8806 PUS → GMP May 27, 02:09 UTCMay 27, 02:44 UTC35m
2026-05-26 ABL8802 PUS → GMP May 26, 22:39 UTCMay 26, 22:59 UTC20m
2026-05-26 ABL322 TAO → PUS May 26, 05:20 UTCMay 26, 05:59 UTC40m
2026-05-25 ABL8827 GMP → PUS May 25, 11:10 UTCMay 25, 11:45 UTC35m
2026-05-25 ABL8822 PUS → GMP May 25, 09:45 UTCMay 25, 10:15 UTC30m
2026-05-25 ABL8821 GMP → PUS May 25, 07:55 UTCMay 25, 08:30 UTC35m
2026-05-25 ABL8816 PUS → GMP May 25, 06:25 UTCMay 25, 07:00 UTC35m
2026-05-24 ABL8024 CJU → GMP May 24, 12:20 UTCMay 24, 12:50 UTC30m
2026-05-24 ABL8813 GMP → PUS May 24, 03:55 UTCMay 24, 04:25 UTC30m
2026-05-24 ABL8806 PUS → GMP May 24, 02:10 UTCMay 24, 02:40 UTC30m
2026-05-24 ABL8807 GMP → PUS May 24, 00:25 UTCMay 24, 00:50 UTC25m
2026-05-23 ABL8802 PUS → GMP May 23, 22:35 UTCMay 23, 23:15 UTC40m
2026-05-23 ABL8813 GMP → PUS May 23, 04:00 UTCMay 23, 04:25 UTC25m
2026-05-23 ABL8806 PUS → GMP May 23, 02:10 UTCMay 23, 02:45 UTC34m
2026-05-23 ABL8807 GMP → PUS May 23, 00:20 UTCMay 23, 00:45 UTC25m
2026-05-22 ABL8802 PUS → GMP May 22, 22:35 UTCMay 22, 23:15 UTC40m
2026-05-22 ABL8827 GMP → PUS May 22, 11:40 UTCMay 22, 12:05 UTC25m
2026-05-22 ABL8822 PUS → GMP May 22, 10:05 UTCMay 22, 10:45 UTC40m
2026-05-22 ABL8821 GMP → PUS May 22, 08:10 UTCMay 22, 08:40 UTC30m
2026-05-22 ABL8816 PUS → GMP May 22, 06:30 UTCMay 22, 07:10 UTC40m
2026-05-21 ABL8025 GMP → CJU May 21, 22:35 UTCMay 21, 22:55 UTC20m
2026-05-21 ABL8024 CJU → GMP May 21, 11:35 UTCMay 21, 12:10 UTC35m
2026-05-21 ABL8813 GMP → PUS May 21, 03:55 UTCMay 21, 04:20 UTC25m
2026-05-21 ABL8806 PUS → GMP May 21, 02:15 UTCMay 21, 02:55 UTC40m
2026-05-21 ABL8807 GMP → PUS May 21, 00:30 UTCMay 21, 00:55 UTC25m
2026-05-20 ABL8802 PUS → GMP May 20, 22:35 UTCMay 20, 23:15 UTC40m
2026-05-20 ABL8827 GMP → PUS May 20, 11:15 UTCMay 20, 11:40 UTC25m
2026-05-20 ABL8822 PUS → GMP May 20, 09:35 UTCMay 20, 10:10 UTC35m
2026-05-20 ABL8821 GMP → PUS May 20, 08:00 UTCMay 20, 08:25 UTC25m
2026-05-20 ABL8816 PUS → GMP May 20, 06:15 UTCMay 20, 06:55 UTC40m
2026-05-19 ABL8827 GMP → PUS May 19, 11:15 UTCMay 19, 11:45 UTC30m
2026-05-19 ABL8816 PUS → GMP May 19, 06:35 UTCMay 19, 07:05 UTC30m
2026-05-18 ABL8013 GMP → CJU May 18, 22:35 UTCMay 18, 23:00 UTC25m
2026-05-17 ABL8802 PUS → GMP May 17, 22:40 UTCMay 17, 23:15 UTC35m
2026-05-17 ABL8019 GMP → CJU May 17, 09:05 UTCMay 17, 09:30 UTC25m
2026-05-17 ABL8818 PUS → GMP May 17, 07:40 UTCMay 17, 08:10 UTC30m
2026-05-17 ABL8817 GMP → PUS May 17, 05:40 UTCMay 17, 06:10 UTC30m
2026-05-17 ABL8808 PUS → GMP May 17, 04:05 UTCMay 17, 04:40 UTC35m
2026-05-17 ABL8809 GMP → PUS May 17, 01:55 UTCMay 17, 02:25 UTC30m
2026-05-17 ABL8804 PUS → GMP May 17, 00:10 UTCMay 17, 00:40 UTC30m
2026-05-16 ABL8813 GMP → PUS May 16, 03:50 UTCMay 16, 04:20 UTC30m
2026-05-16 ABL8806 PUS → GMP May 16, 02:05 UTCMay 16, 02:35 UTC30m
2026-05-16 ABL8807 GMP → PUS May 16, 00:15 UTCMay 16, 00:45 UTC30m
2026-05-15 ABL8802 PUS → GMP May 15, 22:35 UTCMay 15, 23:00 UTC25m
2026-05-14 ABL8025 GMP → CJU May 14, 22:25 UTCMay 14, 22:50 UTC25m

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 HL7744 page for operator, model, and routing details .

Mode-S 71BF44 frequently asked

What is Mode-S code 71BF44?
71BF44 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7744.
Where is Mode-S 71BF44 registered?
Mode-S code 71BF44 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 71BF44 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF44, octal 34337504, decimal 7,454,532.
What flights does 71BF44 operate?
Mode-S 71BF44 has broadcast 20 distinct callsigns, including ABL8802, ABL8813, ABL8806, ABL8024, ABL8807.