Apparatus

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sensors Mode-S transponder

71C272

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

Currently assigned to HL8272 · BOEING 737-900

Hex
71C272
Octal
34341162
Decimal
7,455,346
Country
KR
Tail
HL8272
Type
B739
Broadcasting now · callsign KAL2081 · 26,500 ft
Flights observed
242
Distinct callsigns
20
Country
KR
Last broadcast
14h ago

Current position

71C272 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C272 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
KAL1405 - 18 2026-07-12
KAL115 - 17 2026-07-12
KAL2134 - 16 2026-07-13
KAL2081 - 16 2026-07-13
KAL2133 - 15 2026-07-13
KAL1402 - 15 2026-07-11
KAL116 - 15 2026-07-12
KAL133 - 13 2026-06-30
KAL134 - 9 2026-07-01
KAL126 - 7 2026-07-10
KAL620 - 6 2026-07-07
KAL2082 Korean Air 6 2026-05-15
KAL1431 - 6 2026-06-21
KAL125 - 6 2026-07-10
KAL619 - 5 2026-07-07
KAL1432 Korean Air 5 2026-06-21
KAL2071 - 3 2026-06-13
KAL1830 Korean Air 3 2026-04-21
KAL156 - 3 2026-06-17
KAL146 - 3 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAL2134 - Jul 13, 11:05 UTCJul 13, 12:10 UTC1h 5m
2026-07-13 KAL2133 - Jul 13, 08:40 UTCJul 13, 09:40 UTC1h 0m
2026-07-13 KAL2081 - Jul 13, 02:15 UTCJul 13, 06:55 UTC4h 40m
2026-07-12 KAL1562 - Jul 12, 12:50 UTCJul 12, 13:05 UTC15m
2026-07-12 KAL1549 - Jul 12, 10:40 UTCJul 12, 10:55 UTC15m
2026-07-12 KAL1405 - Jul 12, 08:45 UTCJul 12, 09:25 UTC40m
2026-07-12 KAL116 - Jul 12, 06:05 UTCJul 12, 06:25 UTC20m
2026-07-12 KAL115 - Jul 12, 00:55 UTCJul 12, 01:20 UTC25m
2026-07-11 KAL1402 PUS → ICN Jul 11, 22:01 UTCJul 11, 22:50 UTC50m
2026-07-11 KAL1562 - Jul 11, 13:25 UTCJul 11, 13:40 UTC15m
2026-07-11 KAL1549 - Jul 11, 10:30 UTCJul 11, 10:45 UTC15m
2026-07-11 KAL1405 ICN → PUS Jul 11, 08:25 UTCJul 11, 09:05 UTC40m
2026-07-11 KAL2192 - Jul 11, 04:20 UTCJul 11, 05:20 UTC1h 0m
2026-07-11 KAL2191 - Jul 11, 01:45 UTCJul 11, 02:40 UTC55m
2026-07-10 KAL126 - Jul 10, 08:20 UTCJul 10, 09:05 UTC45m
2026-07-10 KAL125 - Jul 10, 02:05 UTCJul 10, 02:45 UTC40m
2026-07-09 KAL708 - Jul 9, 10:20 UTCJul 9, 12:20 UTC2h 0m
2026-07-09 KAL707 - Jul 9, 06:00 UTCJul 9, 07:55 UTC1h 55m
2026-07-09 KAL744 - Jul 9, 00:35 UTCJul 9, 02:05 UTC1h 30m
2026-07-08 KAL743 - Jul 8, 10:25 UTCJul 8, 11:45 UTC1h 20m
2026-07-08 KAL116 - Jul 8, 05:45 UTCJul 8, 06:05 UTC20m
2026-07-08 KAL115 - Jul 8, 00:50 UTCJul 8, 01:15 UTC25m
2026-07-07 KAL620 - Jul 7, 19:35 UTCJul 7, 23:00 UTC3h 25m
2026-07-07 KAL619 ICN → MNL Jul 7, 14:00 UTCJul 7, 17:30 UTC3h 30m
2026-07-06 KAL1402 PUS → ICN Jul 6, 22:10 UTCJul 6, 23:00 UTC50m
2026-07-06 KAL2134 - Jul 6, 11:10 UTCJul 6, 12:20 UTC1h 10m
2026-07-06 KAL2133 - Jul 6, 08:35 UTCJul 6, 09:40 UTC1h 5m
2026-07-06 KAL2081 - Jul 6, 02:10 UTCJul 6, 06:50 UTC4h 40m
2026-07-05 KAL2134 - Jul 5, 11:20 UTCJul 5, 12:30 UTC1h 10m
2026-07-05 KAL2133 - Jul 5, 08:40 UTCJul 5, 09:45 UTC1h 5m
2026-07-05 KAL2081 - Jul 5, 02:15 UTCJul 5, 06:50 UTC4h 35m
2026-07-04 KAL1405 ICN → PUS Jul 4, 08:25 UTCJul 4, 09:05 UTC40m
2026-07-04 KAL116 - Jul 4, 05:50 UTCJul 4, 06:15 UTC25m
2026-07-04 KAL115 - Jul 4, 01:00 UTCJul 4, 01:25 UTC25m
2026-07-03 KAL1402 PUS → ICN Jul 3, 22:10 UTCJul 3, 23:00 UTC50m
2026-07-03 KAL1405 - Jul 3, 08:30 UTCJul 3, 09:10 UTC40m
2026-07-03 KAL116 - Jul 3, 05:50 UTCJul 3, 06:10 UTC20m
2026-07-03 KAL115 - Jul 3, 01:00 UTCJul 3, 01:20 UTC20m
2026-07-02 KAL126 - Jul 2, 01:40 UTCJul 2, 08:30 UTC6h 50m
2026-07-01 KAL1402 PUS → ICN Jul 1, 22:05 UTCJul 1, 22:55 UTC50m
2026-07-01 KAL1405 - Jul 1, 08:30 UTCJul 1, 09:10 UTC40m
2026-07-01 KAL134 - Jul 1, 04:35 UTCJul 1, 05:00 UTC25m
2026-06-30 KAL133 - Jun 30, 23:15 UTCJun 30, 23:35 UTC20m
2026-06-30 KAL116 - Jun 30, 06:15 UTCJun 30, 06:40 UTC25m
2026-06-30 KAL115 - Jun 30, 00:55 UTCJun 30, 01:19 UTC25m
2026-06-29 KAL116 - Jun 29, 05:40 UTCJun 29, 06:05 UTC25m
2026-06-29 KAL115 - Jun 29, 00:54 UTCJun 29, 01:44 UTC50m
2026-06-28 KAL1402 PUS → ICN Jun 28, 22:10 UTCJun 28, 22:45 UTC35m
2026-06-28 KAL2081 - Jun 28, 02:10 UTCJun 28, 07:09 UTC5h 0m
2026-06-27 KAL1405 - Jun 27, 08:29 UTCJun 27, 09:15 UTC45m

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 HL8272 page for operator, model, and routing details .

Mode-S 71C272 frequently asked

What is Mode-S code 71C272?
71C272 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8272.
Where is Mode-S 71C272 registered?
Mode-S code 71C272 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 71C272 broadcasting right now?
Yes. Mode-S 71C272 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C272, octal 34341162, decimal 7,455,346.
What flights does 71C272 operate?
Mode-S 71C272 has broadcast 20 distinct callsigns, including KAL1405, KAL115, KAL2134, KAL2081, KAL2133.