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 Jul 26, 10:40 UTC
Flights observed
478
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 10:40 UTC

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
ABL8813 - 24 2026-07-21
ABL8806 - 24 2026-07-21
ABL8802 - 23 2026-07-20
ABL8827 Air Busan 22 2026-07-22
ABL8024 Air Busan 22 2026-07-21
ABL8822 - 21 2026-07-14
ABL8821 - 21 2026-07-14
ABL8816 - 21 2026-07-14
ABL8807 - 21 2026-07-21
ABL8013 - 17 2026-07-21
ABL8818 - 15 2026-07-19
ABL8019 Air Busan 15 2026-07-19
ABL8804 Air Busan 13 2026-07-19
ABL8809 - 12 2026-07-19
ABL8305 - 12 2026-07-21
ABL8114 - 12 2026-07-19
ABL321 Air Busan 12 2026-07-26
ABL8304 - 11 2026-07-21
ABL8817 Air Busan 10 2026-07-19
ABL8808 Air Busan 10 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL133 MYJ → PUS Jul 26, 09:45 UTCJul 26, 10:30 UTC45m
2026-07-26 ABL134 PUS → MYJ Jul 26, 07:40 UTCJul 26, 08:30 UTC50m
2026-07-26 ABL321 PUS → TAO Jul 26, 01:45 UTCJul 26, 06:35 UTC4h 51m
2026-07-25 ABL133 MYJ → PUS Jul 25, 11:10 UTCJul 25, 12:05 UTC55m
2026-07-25 ABL134 PUS → MYJ Jul 25, 09:25 UTCJul 25, 10:00 UTC35m
2026-07-25 ABL321 PUS → TAO Jul 25, 01:40 UTCJul 25, 08:10 UTC6h 30m
2026-07-25 ABL8100 CJU → PUS Jul 25, 00:05 UTCJul 25, 00:25 UTC20m
2026-07-24 ABL8101 PUS → CJU Jul 24, 22:00 UTCJul 24, 22:20 UTC20m
2026-07-24 ABL8138 CJU → PUS Jul 24, 11:45 UTCJul 24, 12:05 UTC20m
2026-07-24 ABL8139 PUS → CJU Jul 24, 09:55 UTCJul 24, 10:15 UTC20m
2026-07-24 ABL8112 CJU → PUS Jul 24, 08:40 UTCJul 24, 09:05 UTC25m
2026-07-24 ABL8113 PUS → CJU Jul 24, 06:50 UTCJul 24, 07:10 UTC20m
2026-07-24 ABL8182 CJU → PUS Jul 24, 05:30 UTCJul 24, 05:50 UTC20m
2026-07-24 ABL8183 PUS → CJU Jul 24, 03:20 UTCJul 24, 03:35 UTC15m
2026-07-24 ABL8136 CJU → PUS Jul 24, 01:30 UTCJul 24, 01:45 UTC15m
2026-07-23 ABL8133 PUS → CJU Jul 23, 23:15 UTCJul 23, 23:35 UTC20m
2026-07-23 ABL8138 CJU → PUS Jul 23, 11:40 UTCJul 23, 12:00 UTC20m
2026-07-23 ABL8139 PUS → CJU Jul 23, 09:45 UTCJul 23, 10:05 UTC20m
2026-07-23 ABL322 TAO → PUS Jul 23, 06:15 UTCJul 23, 07:05 UTC50m
2026-07-23 ABL321 PUS → TAO Jul 23, 01:55 UTCJul 23, 02:40 UTC45m
2026-07-23 ABL8100 CJU → PUS Jul 23, 00:10 UTCJul 23, 00:35 UTC25m
2026-07-22 ABL8101 PUS → CJU Jul 22, 22:05 UTCJul 22, 22:15 UTC10m
2026-07-22 ABL8827 GMP → PUS Jul 22, 11:20 UTCJul 22, 12:00 UTC40m
2026-07-22 ABL8108 CJU → PUS Jul 22, 04:55 UTCJul 22, 05:10 UTC15m
2026-07-22 ABL8301 USN → CJU Jul 22, 02:55 UTCJul 22, 03:10 UTC15m
2026-07-22 ABL8300 CJU → USN Jul 22, 01:35 UTCJul 22, 01:50 UTC15m
2026-07-21 ABL8013 - Jul 21, 22:25 UTCJul 21, 23:00 UTC35m
2026-07-21 ABL8024 CJU → GMP Jul 21, 11:35 UTCJul 21, 12:15 UTC40m
2026-07-21 ABL8305 - Jul 21, 08:55 UTCJul 21, 09:15 UTC20m
2026-07-21 ABL8304 - Jul 21, 07:35 UTCJul 21, 07:50 UTC15m
2026-07-21 ABL8115 - Jul 21, 05:40 UTCJul 21, 05:55 UTC15m
2026-07-21 ABL8813 GMP → PUS Jul 21, 03:55 UTCJul 21, 04:35 UTC40m
2026-07-21 ABL8806 PUS → GMP Jul 21, 02:10 UTCJul 21, 02:55 UTC45m
2026-07-21 ABL8807 GMP → PUS Jul 21, 00:25 UTCJul 21, 01:05 UTC40m
2026-07-20 ABL8802 PUS → GMP Jul 20, 22:25 UTCJul 20, 23:10 UTC45m
2026-07-20 ABL8823 GMP → PUS Jul 20, 10:00 UTCJul 20, 10:40 UTC40m
2026-07-20 ABL8820 PUS → GMP Jul 20, 08:20 UTCJul 20, 09:05 UTC45m
2026-07-20 ABL321 PUS → TAO Jul 20, 01:50 UTCJul 20, 06:20 UTC4h 30m
2026-07-20 ABL8100 CJU → PUS Jul 20, 00:05 UTCJul 20, 00:35 UTC30m
2026-07-19 ABL8101 PUS → CJU Jul 19, 22:00 UTCJul 19, 22:20 UTC20m
2026-07-19 ABL8114 - Jul 19, 11:05 UTCJul 19, 11:25 UTC20m
2026-07-19 ABL8019 GMP → CJU Jul 19, 09:05 UTCJul 19, 09:35 UTC30m
2026-07-19 ABL8818 PUS → GMP Jul 19, 07:30 UTCJul 19, 08:05 UTC35m
2026-07-19 ABL8817 GMP → PUS Jul 19, 05:40 UTCJul 19, 06:25 UTC45m
2026-07-19 ABL8808 PUS → GMP Jul 19, 04:05 UTCJul 19, 04:45 UTC40m
2026-07-19 ABL8809 GMP → PUS Jul 19, 02:00 UTCJul 19, 02:40 UTC40m
2026-07-19 ABL8804 PUS → GMP Jul 19, 00:05 UTCJul 19, 00:50 UTC45m
2026-07-18 ABL8114 - Jul 18, 11:15 UTCJul 18, 11:30 UTC15m
2026-07-18 ABL8305 - Jul 18, 09:05 UTCJul 18, 09:25 UTC20m
2026-07-18 ABL8304 - Jul 18, 07:45 UTCJul 18, 08:05 UTC20m

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 Jul 26, 10:40 UTC.
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 ABL8813, ABL8806, ABL8802, ABL8827, ABL8024.