Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF53

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

Currently assigned to HL7753 · AIRBUS A-320

Hex
71BF53
Octal
34337523
Decimal
7,454,547
Country
KR
Tail
HL7753
Type
A320
No current signal · last broadcast 1d ago
Flights observed
160
Distinct callsigns
20
Country
KR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 71BF53.

Country allocation

The ICAO 24-bit address 71BF53 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
ABL8827 Air Busan 13 2026-05-26
ABL8822 Air Busan 13 2026-05-26
ABL8821 Air Busan 13 2026-05-26
ABL8816 Air Busan 13 2026-05-26
ABL8802 Air Busan 12 2026-05-24
ABL8024 Air Busan 12 2026-05-25
ABL8813 Air Busan 11 2026-05-25
ABL8806 Air Busan 11 2026-05-25
ABL8807 Air Busan 10 2026-05-22
ABL8013 Air Busan 10 2026-05-25
ABL8818 Air Busan 5 2026-05-23
ABL8817 Air Busan 5 2026-05-23
ABL8809 Air Busan 5 2026-05-23
ABL8808 Air Busan 5 2026-05-23
ABL8804 Air Busan 5 2026-05-23
ABL8019 Air Busan 5 2026-05-23
ABL8025 Air Busan 2 2026-05-20
ABL8872 Air Busan 1 2026-05-29
ABL8811 Air Busan 1 2026-05-29
ABL8301 Air Busan 1 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ABL8811 GMP → PUS May 29, 03:00 UTCMay 29, 03:25 UTC25m
2026-05-29 ABL8872 PUS → GMP May 29, 01:30 UTCMay 29, 02:05 UTC35m
2026-05-26 ABL411 PUS → UBN May 26, 13:45 UTCMay 26, 21:40 UTC7h 55m
2026-05-26 ABL8827 GMP → PUS May 26, 11:15 UTCMay 26, 11:44 UTC30m
2026-05-26 ABL8822 PUS → GMP May 26, 09:35 UTCMay 26, 10:14 UTC40m
2026-05-26 ABL8821 GMP → PUS May 26, 07:49 UTCMay 26, 08:19 UTC30m
2026-05-26 ABL8816 PUS → GMP May 26, 06:14 UTCMay 26, 06:49 UTC35m
2026-05-25 ABL8013 GMP → CJU May 25, 22:30 UTCMay 25, 22:55 UTC25m
2026-05-25 ABL8024 CJU → GMP May 25, 12:10 UTCMay 25, 12:40 UTC30m
2026-05-25 ABL8813 GMP → PUS May 25, 04:00 UTCMay 25, 04:25 UTC25m
2026-05-25 ABL8806 PUS → GMP May 25, 02:05 UTCMay 25, 02:40 UTC35m
2026-05-24 ABL8802 PUS → GMP May 24, 23:00 UTCMay 24, 23:15 UTC15m
2026-05-24 ABL8827 GMP → PUS May 24, 11:15 UTCMay 24, 11:40 UTC25m
2026-05-24 ABL8822 PUS → GMP May 24, 09:35 UTCMay 24, 10:05 UTC30m
2026-05-24 ABL8821 GMP → PUS May 24, 07:50 UTCMay 24, 08:20 UTC30m
2026-05-24 ABL8816 PUS → GMP May 24, 06:20 UTCMay 24, 06:50 UTC30m
2026-05-23 ABL8013 GMP → CJU May 23, 22:45 UTCMay 23, 23:05 UTC20m
2026-05-23 ABL8024 CJU → GMP May 23, 11:10 UTCMay 23, 11:40 UTC30m
2026-05-23 ABL8019 GMP → CJU May 23, 08:55 UTCMay 23, 09:20 UTC25m
2026-05-23 ABL8818 PUS → GMP May 23, 07:25 UTCMay 23, 08:00 UTC35m
2026-05-23 ABL8817 GMP → PUS May 23, 05:40 UTCMay 23, 06:10 UTC30m
2026-05-23 ABL8808 PUS → GMP May 23, 04:00 UTCMay 23, 04:40 UTC40m
2026-05-23 ABL8809 GMP → PUS May 23, 02:00 UTCMay 23, 02:25 UTC25m
2026-05-23 ABL8804 PUS → GMP May 23, 00:10 UTCMay 23, 00:45 UTC35m
2026-05-22 ABL8813 GMP → PUS May 22, 04:00 UTCMay 22, 04:25 UTC25m
2026-05-22 ABL8806 PUS → GMP May 22, 02:25 UTCMay 22, 03:00 UTC35m
2026-05-22 ABL8807 GMP → PUS May 22, 00:25 UTCMay 22, 00:55 UTC30m
2026-05-21 ABL8802 PUS → GMP May 21, 22:30 UTCMay 21, 23:10 UTC40m
2026-05-21 ABL8827 GMP → PUS May 21, 11:20 UTCMay 21, 11:50 UTC30m
2026-05-21 ABL8822 PUS → GMP May 21, 09:55 UTCMay 21, 10:25 UTC30m
2026-05-21 ABL8821 GMP → PUS May 21, 08:05 UTCMay 21, 08:30 UTC25m
2026-05-21 ABL8816 PUS → GMP May 21, 06:35 UTCMay 21, 07:05 UTC30m
2026-05-20 ABL8025 GMP → CJU May 20, 22:30 UTCMay 20, 22:55 UTC25m
2026-05-20 ABL8024 CJU → GMP May 20, 12:15 UTCMay 20, 12:50 UTC35m
2026-05-20 ABL8019 GMP → CJU May 20, 09:15 UTCMay 20, 09:40 UTC25m
2026-05-20 ABL8818 PUS → GMP May 20, 07:30 UTCMay 20, 08:05 UTC35m
2026-05-20 ABL8817 GMP → PUS May 20, 05:45 UTCMay 20, 06:10 UTC25m
2026-05-20 ABL8808 PUS → GMP May 20, 04:00 UTCMay 20, 04:35 UTC35m
2026-05-20 ABL8809 GMP → PUS May 20, 02:00 UTCMay 20, 02:25 UTC25m
2026-05-20 ABL8804 PUS → GMP May 20, 00:10 UTCMay 20, 00:45 UTC35m
2026-05-19 ABL1615 TOY → PUS May 19, 07:45 UTCMay 19, 08:20 UTC35m
2026-05-19 ABL123 KIX → PUS May 19, 02:20 UTCMay 19, 05:50 UTC3h 30m
2026-05-18 ABL124 PUS → KIX May 18, 23:55 UTCMay 19, 00:40 UTC45m
2026-05-18 ABL8827 GMP → PUS May 18, 11:10 UTCMay 18, 11:35 UTC25m
2026-05-18 ABL8822 PUS → GMP May 18, 09:35 UTCMay 18, 10:10 UTC35m
2026-05-18 ABL8821 GMP → PUS May 18, 07:50 UTCMay 18, 08:20 UTC30m
2026-05-18 ABL8816 PUS → GMP May 18, 06:35 UTCMay 18, 06:55 UTC20m
2026-05-17 ABL8013 GMP → CJU May 17, 22:30 UTCMay 17, 22:55 UTC25m
2026-05-17 ABL8024 CJU → GMP May 17, 12:15 UTCMay 17, 12:40 UTC25m
2026-05-17 ABL8813 GMP → PUS May 17, 03:55 UTCMay 17, 04:30 UTC35m

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 HL7753 page for operator, model, and routing details .

Mode-S 71BF53 frequently asked

What is Mode-S code 71BF53?
71BF53 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7753.
Where is Mode-S 71BF53 registered?
Mode-S code 71BF53 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 71BF53 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 71BF53, octal 34337523, decimal 7,454,547.
What flights does 71BF53 operate?
Mode-S 71BF53 has broadcast 20 distinct callsigns, including ABL8827, ABL8822, ABL8821, ABL8816, ABL8802.