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 Jul 26, 11:55 UTC
Flights observed
368
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 11:55 UTC

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
ABL8813 Air Busan 28 2026-07-25
ABL8802 Air Busan 28 2026-07-24
ABL8806 Air Busan 25 2026-07-25
ABL8807 Air Busan 22 2026-07-25
ABL8024 Air Busan 22 2026-07-23
ABL8827 Air Busan 18 2026-07-24
ABL8816 Air Busan 18 2026-07-24
ABL8822 Air Busan 17 2026-07-24
ABL8821 Air Busan 16 2026-07-24
ABL8019 - 9 2026-07-08
ABL8013 - 9 2026-07-19
ABL8818 - 8 2026-07-08
ABL8305 Air Busan 8 2026-07-25
ABL8304 Air Busan 8 2026-07-25
ABL8115 Air Busan 8 2026-07-25
ABL8300 Air Busan 7 2026-07-24
ABL8025 Air Busan 7 2026-07-23
ABL8301 Air Busan 6 2026-07-24
ABL8138 Air Busan 6 2026-07-26
ABL8114 Air Busan 6 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL8138 CJU → PUS Jul 26, 11:25 UTCJul 26, 11:45 UTC20m
2026-07-26 ABL8139 PUS → CJU Jul 26, 09:40 UTCJul 26, 09:55 UTC15m
2026-07-26 ABL8112 CJU → PUS Jul 26, 08:30 UTCJul 26, 08:45 UTC15m
2026-07-26 ABL8113 PUS → CJU Jul 26, 06:15 UTCJul 26, 06:30 UTC15m
2026-07-25 ABL8114 CJU → PUS Jul 25, 11:10 UTCJul 25, 11:35 UTC25m
2026-07-25 ABL8305 USN → CJU Jul 25, 09:15 UTCJul 25, 09:30 UTC15m
2026-07-25 ABL8304 CJU → USN Jul 25, 07:50 UTCJul 25, 08:05 UTC15m
2026-07-25 ABL8115 PUS → CJU Jul 25, 05:45 UTCJul 25, 06:00 UTC15m
2026-07-25 ABL8813 GMP → PUS Jul 25, 04:00 UTCJul 25, 04:40 UTC40m
2026-07-25 ABL8806 PUS → GMP Jul 25, 02:00 UTCJul 25, 02:40 UTC40m
2026-07-25 ABL8807 GMP → PUS Jul 25, 00:25 UTCJul 25, 01:00 UTC35m
2026-07-24 ABL8802 PUS → GMP Jul 24, 22:30 UTCJul 24, 23:15 UTC45m
2026-07-24 ABL8827 GMP → PUS Jul 24, 11:35 UTCJul 24, 12:15 UTC40m
2026-07-24 ABL8822 PUS → GMP Jul 24, 10:00 UTCJul 24, 10:45 UTC45m
2026-07-24 ABL8821 GMP → PUS Jul 24, 08:15 UTCJul 24, 09:00 UTC45m
2026-07-24 ABL8816 PUS → GMP Jul 24, 06:20 UTCJul 24, 07:05 UTC45m
2026-07-24 ABL8108 CJU → PUS Jul 24, 04:45 UTCJul 24, 05:05 UTC20m
2026-07-24 ABL8301 USN → CJU Jul 24, 02:30 UTCJul 24, 02:45 UTC15m
2026-07-24 ABL8300 CJU → USN Jul 24, 00:50 UTCJul 24, 01:05 UTC15m
2026-07-23 ABL8025 GMP → CJU Jul 23, 22:20 UTCJul 23, 22:55 UTC35m
2026-07-23 ABL8024 CJU → GMP Jul 23, 11:15 UTCJul 23, 12:00 UTC45m
2026-07-23 ABL8305 - Jul 23, 09:10 UTCJul 23, 09:30 UTC20m
2026-07-23 ABL8304 - Jul 23, 07:50 UTCJul 23, 08:05 UTC15m
2026-07-23 ABL8115 - Jul 23, 05:50 UTCJul 23, 06:10 UTC20m
2026-07-22 ABL8802 PUS → GMP Jul 22, 22:35 UTCJul 22, 23:15 UTC40m
2026-07-22 ABL8138 CJU → PUS Jul 22, 11:20 UTCJul 22, 11:40 UTC20m
2026-07-21 ABL8138 CJU → PUS Jul 21, 11:40 UTCJul 21, 12:10 UTC30m
2026-07-21 ABL8139 PUS → CJU Jul 21, 09:45 UTCJul 21, 10:00 UTC15m
2026-07-21 ABL8112 CJU → PUS Jul 21, 08:20 UTCJul 21, 08:45 UTC25m
2026-07-21 ABL8113 PUS → CJU Jul 21, 06:15 UTCJul 21, 06:35 UTC20m
2026-07-21 ABL123 KIX → PUS Jul 21, 02:30 UTCJul 21, 03:35 UTC1h 5m
2026-07-20 ABL124 PUS → KIX Jul 20, 23:45 UTCJul 21, 01:00 UTC1h 15m
2026-07-20 ABL8827 GMP → PUS Jul 20, 11:20 UTCJul 20, 12:00 UTC40m
2026-07-20 ABL8822 PUS → GMP Jul 20, 09:45 UTCJul 20, 10:30 UTC45m
2026-07-20 ABL8821 GMP → PUS Jul 20, 08:10 UTCJul 20, 08:50 UTC40m
2026-07-20 ABL8816 PUS → GMP Jul 20, 06:30 UTCJul 20, 07:15 UTC45m
2026-07-20 ABL8108 CJU → PUS Jul 20, 05:10 UTCJul 20, 05:25 UTC15m
2026-07-20 ABL8301 USN → CJU Jul 20, 03:05 UTCJul 20, 03:25 UTC20m
2026-07-20 ABL8300 - Jul 20, 01:45 UTCJul 20, 01:55 UTC10m
2026-07-19 ABL8013 - Jul 19, 22:35 UTCJul 19, 23:20 UTC45m
2026-07-19 ABL8024 CJU → GMP Jul 19, 12:05 UTCJul 19, 12:40 UTC35m
2026-07-19 ABL8305 - Jul 19, 09:15 UTCJul 19, 09:30 UTC15m
2026-07-19 ABL8304 - Jul 19, 07:45 UTCJul 19, 08:05 UTC20m
2026-07-19 ABL8115 - Jul 19, 06:00 UTCJul 19, 06:20 UTC20m
2026-07-19 ABL8813 GMP → PUS Jul 19, 04:15 UTCJul 19, 05:05 UTC50m
2026-07-19 ABL8806 PUS → GMP Jul 19, 02:10 UTCJul 19, 02:55 UTC45m
2026-07-19 ABL8807 GMP → PUS Jul 19, 00:25 UTCJul 19, 01:00 UTC35m
2026-07-18 ABL8802 PUS → GMP Jul 18, 22:30 UTCJul 18, 23:15 UTC45m
2026-07-18 ABL8182 - Jul 18, 04:40 UTCJul 18, 05:00 UTC20m
2026-07-18 ABL8183 - Jul 18, 02:40 UTCJul 18, 02:55 UTC16m

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 Jul 26, 11:55 UTC.
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 ABL8813, ABL8802, ABL8806, ABL8807, ABL8024.