Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF29

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

Currently assigned to HL7729 · AIRBUS A-321

Hex
71BF29
Octal
34337451
Decimal
7,454,505
Country
KR
Tail
HL7729
Type
A321
No current signal · last broadcast Jul 26, 07:20 UTC
Flights observed
293
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 07:20 UTC

Last known position

Most recent position reported by Mode-S 71BF29.

Country allocation

The ICAO 24-bit address 71BF29 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
ABL8826 - 13 2026-07-08
ABL8811 - 12 2026-07-15
ABL8040 - 12 2026-07-15
ABL8021 - 10 2026-07-09
ABL337 Air Busan 10 2026-07-20
ABL8803 Air Busan 9 2026-07-22
ABL8028 - 9 2026-07-09
ABL125 - 8 2026-07-04
ABL134 - 7 2026-07-19
ABL133 - 7 2026-07-19
ABL126 - 7 2026-07-04
ABL122 - 7 2026-07-17
ABL121 - 7 2026-07-17
ABL712 Air Busan 6 2026-07-25
ABL148 - 6 2026-07-09
ABL8823 - 5 2026-07-06
ABL8820 - 5 2026-07-06
ABL8117 - 5 2026-07-14
ABL8116 - 5 2026-07-14
ABL338 Air Busan 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL3465 HET → PUS Jul 26, 00:35 UTCJul 26, 07:20 UTC6h 46m
2026-07-25 ABL712 CEB → PUS Jul 25, 21:10 UTCJul 25, 21:40 UTC30m
2026-07-25 ABL712 CEB → PUS Jul 25, 18:05 UTCJul 25, 20:20 UTC2h 15m
2026-07-25 ABL338 YNJ → PUS Jul 25, 00:50 UTCJul 25, 06:55 UTC6h 5m
2026-07-24 ABL712 CEB → PUS Jul 24, 21:05 UTCJul 24, 21:40 UTC35m
2026-07-24 ABL712 CEB → PUS Jul 24, 18:10 UTCJul 24, 20:20 UTC2h 10m
2026-07-24 ABL792 TPE → PUS Jul 24, 10:35 UTCJul 24, 10:55 UTC20m
2026-07-24 ABL792 TPE → PUS Jul 24, 09:05 UTCJul 24, 09:30 UTC25m
2026-07-24 ABL791 PUS → TPE Jul 24, 07:10 UTCJul 24, 07:35 UTC25m
2026-07-24 ABL791 PUS → TPE Jul 24, 05:35 UTCJul 24, 05:55 UTC20m
2026-07-24 ABL111 NRT → PUS Jul 24, 02:20 UTCJul 24, 04:05 UTC1h 45m
2026-07-22 ABL8803 GMP → PUS Jul 22, 22:40 UTCJul 22, 23:25 UTC45m
2026-07-22 ABL8824 - Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-21 ABL1315 - Jul 21, 10:40 UTCJul 21, 11:40 UTC1h 0m
2026-07-21 ABL1325 PUS → TAK Jul 21, 08:30 UTCJul 21, 09:20 UTC50m
2026-07-21 ABL321 PUS → TAO Jul 21, 01:50 UTCJul 21, 06:20 UTC4h 30m
2026-07-20 ABL712 - Jul 20, 21:25 UTCJul 20, 21:50 UTC25m
2026-07-20 ABL711 - Jul 20, 12:25 UTCJul 20, 20:35 UTC8h 10m
2026-07-20 ABL8172 - Jul 20, 10:30 UTCJul 20, 10:50 UTC20m
2026-07-20 ABL8173 PUS → CJU Jul 20, 08:50 UTCJul 20, 09:05 UTC15m
2026-07-20 ABL337 PUS → YNJ Jul 20, 01:00 UTCJul 20, 06:55 UTC5h 55m
2026-07-19 BX712 - Jul 19, 21:30 UTCJul 19, 21:50 UTC20m
2026-07-19 ABL711 - Jul 19, 12:30 UTCJul 19, 20:50 UTC8h 20m
2026-07-19 ABL133 - Jul 19, 09:40 UTCJul 19, 10:20 UTC40m
2026-07-19 ABL134 - Jul 19, 07:40 UTCJul 19, 08:20 UTC40m
2026-07-19 ABL321 PUS → TAO Jul 19, 01:50 UTCJul 19, 06:20 UTC4h 30m
2026-07-18 ABL8134 - Jul 18, 11:00 UTCJul 18, 11:20 UTC20m
2026-07-18 ABL8135 - Jul 18, 09:00 UTCJul 18, 09:20 UTC20m
2026-07-18 ABL338 YNJ → PUS Jul 18, 06:00 UTCJul 18, 07:05 UTC1h 5m
2026-07-17 ABL412 - Jul 17, 20:44 UTCJul 17, 21:34 UTC50m
2026-07-17 ABL121 KIX → PUS Jul 17, 10:20 UTCJul 17, 11:39 UTC1h 20m
2026-07-17 ABL122 PUS → KIX Jul 17, 07:50 UTCJul 17, 08:59 UTC1h 10m
2026-07-17 ABL1635 - Jul 17, 03:05 UTCJul 17, 04:29 UTC1h 25m
2026-07-17 ABL1645 - Jul 17, 00:30 UTCJul 17, 01:49 UTC1h 20m
2026-07-16 ABL143 - Jul 16, 11:10 UTCJul 16, 11:45 UTC35m
2026-07-16 ABL145 - Jul 16, 07:15 UTCJul 16, 07:55 UTC40m
2026-07-15 ABL8803 GMP → PUS Jul 15, 22:40 UTCJul 15, 23:20 UTC40m
2026-07-15 ABL804F PUS → GMP Jul 15, 11:45 UTCJul 15, 12:20 UTC35m
2026-07-15 ABL8811 GMP → PUS Jul 15, 03:00 UTCJul 15, 03:40 UTC40m
2026-07-15 ABL8040 - Jul 15, 01:10 UTCJul 15, 01:50 UTC40m
2026-07-14 ABL8107 - Jul 14, 22:35 UTCJul 14, 22:55 UTC19m
2026-07-14 ABL8116 - Jul 14, 10:10 UTCJul 14, 10:30 UTC20m
2026-07-14 ABL8117 - Jul 14, 08:20 UTCJul 14, 08:35 UTC15m
2026-07-14 ABL8110 - Jul 14, 06:40 UTCJul 14, 06:55 UTC15m
2026-07-14 ABL8111 - Jul 14, 04:45 UTCJul 14, 05:00 UTC15m
2026-07-14 ABL8811 GMP → PUS Jul 14, 02:55 UTCJul 14, 03:35 UTC40m
2026-07-14 ABL8040 - Jul 14, 01:20 UTCJul 14, 02:00 UTC40m
2026-07-13 ABL8105 - Jul 13, 23:00 UTCJul 13, 23:15 UTC15m
2026-07-13 ABL8172 - Jul 13, 10:55 UTCJul 13, 11:15 UTC20m
2026-07-13 ABL8173 - Jul 13, 08:30 UTCJul 13, 08:50 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 HL7729 page for operator, model, and routing details .

Mode-S 71BF29 frequently asked

What is Mode-S code 71BF29?
71BF29 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7729.
Where is Mode-S 71BF29 registered?
Mode-S code 71BF29 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 71BF29 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF29, octal 34337451, decimal 7,454,505.
What flights does 71BF29 operate?
Mode-S 71BF29 has broadcast 20 distinct callsigns, including ABL8826, ABL8811, ABL8040, ABL8021, ABL337.