Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C256

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

Currently assigned to HL8256 · AIRBUS A-321

Hex
71C256
Octal
34341126
Decimal
7,455,318
Country
KR
Tail
HL8256
Type
A321
No current signal · last broadcast Jul 26, 12:15 UTC
Flights observed
355
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:15 UTC

Last known position

Most recent position reported by Mode-S 71C256.

Country allocation

The ICAO 24-bit address 71C256 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
ABL8811 Air Busan 18 2026-07-25
ABL8826 Air Busan 11 2026-07-26
ABL8040 - 11 2026-07-18
ABL122 Air Busan 11 2026-07-24
ABL121 Air Busan 11 2026-07-24
ABL8111 Air Busan 10 2026-07-26
ABL8110 Air Busan 10 2026-07-26
ABL796 - 10 2026-06-28
ABL125 Air Busan 10 2026-07-24
ABL8823 Air Busan 9 2026-07-26
ABL795 - 9 2026-06-28
ABL148 Air Busan 9 2026-07-23
ABL147 Air Busan 9 2026-07-23
ABL143 Air Busan 9 2026-07-22
ABL126 Air Busan 9 2026-07-24
ABL8872 - 8 2026-07-12
ABL773 - 8 2026-07-18
ABL337 Air Busan 8 2026-07-17
ABL1325 Air Busan 8 2026-07-17
ABL1315 - 8 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL8826 PUS → GMP Jul 26, 11:35 UTCJul 26, 12:10 UTC35m
2026-07-26 ABL8823 GMP → PUS Jul 26, 10:00 UTCJul 26, 10:40 UTC40m
2026-07-26 ABL8820 PUS → GMP Jul 26, 08:25 UTCJul 26, 09:10 UTC45m
2026-07-26 ABL8110 CJU → PUS Jul 26, 06:50 UTCJul 26, 07:25 UTC35m
2026-07-26 ABL8111 PUS → CJU Jul 26, 04:50 UTCJul 26, 05:10 UTC20m
2026-07-25 ABL341 PUS → XIY Jul 25, 13:25 UTCJul 25, 21:25 UTC8h 0m
2026-07-25 ABL8116 CJU → PUS Jul 25, 09:55 UTCJul 25, 10:20 UTC25m
2026-07-25 ABL8117 PUS → CJU Jul 25, 08:05 UTCJul 25, 08:20 UTC15m
2026-07-25 ABL8110 CJU → PUS Jul 25, 06:35 UTCJul 25, 07:00 UTC25m
2026-07-25 ABL8111 PUS → CJU Jul 25, 04:35 UTCJul 25, 04:55 UTC20m
2026-07-25 ABL8811 GMP → PUS Jul 25, 02:55 UTCJul 25, 03:30 UTC35m
2026-07-24 ABL8107 PUS → CJU Jul 24, 22:45 UTCJul 24, 23:00 UTC15m
2026-07-24 ABL121 KIX → PUS Jul 24, 10:20 UTCJul 24, 11:35 UTC1h 15m
2026-07-24 ABL122 PUS → KIX Jul 24, 07:45 UTCJul 24, 08:45 UTC1h 0m
2026-07-24 ABL125 KIX → PUS Jul 24, 05:25 UTCJul 24, 06:35 UTC1h 10m
2026-07-24 ABL126 PUS → KIX Jul 24, 02:30 UTCJul 24, 03:45 UTC1h 15m
2026-07-23 ABL148 PUS → FUK Jul 23, 23:00 UTCJul 23, 23:20 UTC20m
2026-07-23 ABL122 PUS → KIX Jul 23, 07:50 UTCJul 23, 08:50 UTC1h 0m
2026-07-23 ABL125 KIX → PUS Jul 23, 05:20 UTCJul 23, 06:25 UTC1h 5m
2026-07-23 ABL126 PUS → KIX Jul 23, 02:50 UTCJul 23, 03:55 UTC1h 5m
2026-07-23 ABL147 FUK → PUS Jul 23, 00:45 UTCJul 23, 01:30 UTC45m
2026-07-22 ABL148 PUS → FUK Jul 22, 22:45 UTCJul 22, 23:05 UTC20m
2026-07-22 ABL143 FUK → PUS Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 ABL146 PUS → FUK Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 ABL141 FUK → PUS Jul 22, 03:05 UTCJul 22, 03:35 UTC30m
2026-07-22 ABL142 PUS → FUK Jul 22, 01:15 UTCJul 22, 01:35 UTC20m
2026-07-21 ABL411 PUS → UBN Jul 21, 13:10 UTCJul 21, 21:35 UTC8h 25m
2026-07-21 ABL121 KIX → PUS Jul 21, 10:20 UTCJul 21, 11:20 UTC1h 0m
2026-07-21 ABL122 PUS → KIX Jul 21, 07:50 UTCJul 21, 08:55 UTC1h 5m
2026-07-21 ABL125 - Jul 21, 05:25 UTCJul 21, 06:30 UTC1h 5m
2026-07-21 ABL147 - Jul 21, 00:40 UTCJul 21, 01:20 UTC40m
2026-07-20 ABL148 - Jul 20, 22:45 UTCJul 20, 23:10 UTC25m
2026-07-20 ABL143 FUK → PUS Jul 20, 11:10 UTCJul 20, 11:40 UTC30m
2026-07-20 ABL144 - Jul 20, 09:05 UTCJul 20, 09:40 UTC35m
2026-07-20 ABL145 FUK → PUS Jul 20, 07:15 UTCJul 20, 07:45 UTC30m
2026-07-20 ABL146 - Jul 20, 05:05 UTCJul 20, 05:40 UTC35m
2026-07-20 ABL141 FUK → PUS Jul 20, 03:15 UTCJul 20, 03:50 UTC35m
2026-07-20 ABL142 PUS → FUK Jul 20, 01:20 UTCJul 20, 01:35 UTC15m
2026-07-19 ABL8803 - Jul 19, 22:40 UTCJul 19, 23:30 UTC50m
2026-07-19 ABL8826 PUS → GMP Jul 19, 12:10 UTCJul 19, 12:45 UTC35m
2026-07-19 ABL8116 CJU → PUS Jul 19, 10:55 UTCJul 19, 11:05 UTC10m
2026-07-19 ABL8117 PUS → CJU Jul 19, 08:50 UTCJul 19, 09:10 UTC20m
2026-07-19 ABL8110 CJU → PUS Jul 19, 07:20 UTCJul 19, 07:45 UTC25m
2026-07-19 ABL8111 PUS → CJU Jul 19, 05:20 UTCJul 19, 05:40 UTC20m
2026-07-19 ABL123 KIX → PUS Jul 19, 02:40 UTCJul 19, 04:00 UTC1h 20m
2026-07-19 ABL124 PUS → KIX Jul 19, 00:05 UTCJul 19, 01:10 UTC1h 5m
2026-07-18 ABL774 DAD → PUS Jul 18, 22:20 UTCJul 18, 22:35 UTC15m
2026-07-18 ABL773 - Jul 18, 13:40 UTCJul 18, 21:05 UTC7h 25m
2026-07-18 ABL773 - Jul 18, 12:15 UTCJul 18, 12:35 UTC20m
2026-07-18 ABL8823 - Jul 18, 09:55 UTCJul 18, 10:35 UTC40m

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 HL8256 page for operator, model, and routing details .

Mode-S 71C256 frequently asked

What is Mode-S code 71C256?
71C256 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8256.
Where is Mode-S 71C256 registered?
Mode-S code 71C256 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 71C256 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C256, octal 34341126, decimal 7,455,318.
What flights does 71C256 operate?
Mode-S 71C256 has broadcast 20 distinct callsigns, including ABL8811, ABL8826, ABL8040, ABL122, ABL121.