Apparatus

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sensors Mode-S transponder

71BE39

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

Currently assigned to HL7639 · BOEING 747-8

Hex
71BE39
Octal
34337071
Decimal
7,454,265
Country
KR
Tail
HL7639
Type
B748
No current signal · last broadcast Jul 13, 14:00 UTC
Flights observed
241
Distinct callsigns
20
Country
KR
Last broadcast
Jul 13, 14:00 UTC

Last known position

Most recent position reported by Mode-S 71BE39.

Country allocation

The ICAO 24-bit address 71BE39 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
KAL537 - 20 2026-07-09
KAL214 - 19 2026-06-27
KAL538 - 14 2026-07-10
KAL233 Korean Air 12 2026-06-13
KAL8256 Korean Air 11 2026-05-31
KAL513 Korean Air 10 2026-06-14
KAL8592 Korean Air 9 2026-06-17
KAL8233 Korean Air 9 2026-04-18
KAL517 - 8 2026-06-23
KAL213 - 8 2026-06-26
KAL9253 Korean Air 7 2026-06-22
KAL8255 Korean Air 7 2026-05-30
KAL591 Korean Air 7 2026-06-16
KAL514 Korean Air 7 2026-06-14
KAL8245 - 6 2026-06-30
KAL552 - 6 2026-07-08
KAL551 - 6 2026-07-08
KAL518 Korean Air 6 2026-06-24
KAL554 Korean Air 5 2026-06-17
KAL553 - 5 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAL197F ICN → PUS Jul 13, 12:45 UTCJul 13, 13:45 UTC1h 0m
2026-07-10 KAL538 - Jul 10, 04:30 UTCJul 10, 04:45 UTC15m
2026-07-09 KAL538 - Jul 9, 18:15 UTCJul 10, 03:35 UTC9h 20m
2026-07-09 KAL537 VIE → FRA Jul 9, 14:35 UTCJul 9, 15:45 UTC1h 10m
2026-07-09 KAL537 - Jul 9, 02:35 UTCJul 9, 12:55 UTC10h 20m
2026-07-09 KAL537 - Jul 9, 01:15 UTCJul 9, 01:35 UTC20m
2026-07-08 KAL552 - Jul 8, 09:50 UTCJul 8, 11:45 UTC1h 55m
2026-07-08 KAL551 ICN → NRT Jul 8, 05:40 UTCJul 8, 07:30 UTC1h 50m
2026-07-07 KAL314 HKG → HKG Jul 7, 19:25 UTCJul 7, 22:25 UTC3h 0m
2026-07-07 KAL313 ICN → HKG Jul 7, 13:30 UTCJul 7, 16:35 UTC3h 5m
2026-07-06 KAL8204 - Jul 6, 16:15 UTCJul 7, 04:35 UTC12h 20m
2026-07-06 KAL8203 ICN → LAX Jul 6, 02:45 UTCJul 6, 13:15 UTC10h 30m
2026-07-05 KAL320 - Jul 5, 15:10 UTCJul 6, 00:05 UTC8h 55m
2026-07-05 KAL538 - Jul 5, 06:30 UTCJul 5, 06:55 UTC25m
2026-07-04 KAL538 - Jul 4, 20:00 UTCJul 5, 05:35 UTC9h 35m
2026-07-04 KAL537 VIE → FRA Jul 4, 16:00 UTCJul 4, 17:05 UTC1h 5m
2026-07-04 KAL537 - Jul 4, 03:45 UTCJul 4, 14:20 UTC10h 35m
2026-07-04 KAL537 - Jul 4, 02:40 UTCJul 4, 02:55 UTC15m
2026-07-03 KAL315 ICN → ICN Jul 3, 15:20 UTCJul 4, 00:05 UTC8h 45m
2026-07-03 KAL552 - Jul 3, 10:15 UTCJul 3, 12:25 UTC2h 10m
2026-07-03 KAL551 - Jul 3, 04:45 UTCJul 3, 06:40 UTC1h 55m
2026-07-02 KAL8210 LAX → SEA Jul 2, 13:10 UTCJul 3, 00:00 UTC10h 50m
2026-07-02 KAL8210 LAX → SEA Jul 2, 08:15 UTCJul 2, 10:30 UTC2h 15m
2026-07-01 KAL8209 ANC → LAX Jul 1, 19:35 UTCJul 2, 06:00 UTC10h 25m
2026-06-30 KAL8246 SEA → ICN Jun 30, 13:40 UTCJul 1, 00:45 UTC11h 5m
2026-06-30 KAL8245 DFW → SEA Jun 30, 07:40 UTCJun 30, 11:10 UTC3h 30m
2026-06-29 KAL8245 ICN → DFW Jun 29, 17:05 UTCJun 30, 05:15 UTC12h 11m
2026-06-29 KAL510 - Jun 29, 06:50 UTCJun 29, 07:15 UTC25m
2026-06-28 KAL510 - Jun 28, 20:04 UTCJun 29, 05:59 UTC9h 55m
2026-06-28 KAL509 - Jun 28, 02:49 UTCJun 28, 12:35 UTC9h 45m
2026-06-27 KAL214 SFO → ICN Jun 27, 11:20 UTCJun 27, 23:29 UTC12h 10m
2026-06-27 KAL214 - Jun 27, 07:59 UTCJun 27, 08:55 UTC55m
2026-06-26 KAL213 - Jun 26, 17:50 UTCJun 27, 04:09 UTC10h 20m
2026-06-26 KAL9256 ATL → ANC Jun 26, 01:05 UTCJun 26, 09:24 UTC8h 20m
2026-06-25 KAL9256 ATL → ANC Jun 25, 16:45 UTCJun 25, 23:49 UTC7h 5m
2026-06-25 KAL9255 ICN → DFW Jun 25, 12:50 UTCJun 25, 14:29 UTC1h 40m
2026-06-24 KAL9255 ICN → DFW Jun 24, 22:04 UTCJun 25, 09:55 UTC11h 50m
2026-06-24 KAL9558 - Jun 24, 12:20 UTCJun 24, 13:10 UTC50m
2026-06-24 KAL9557 - Jun 24, 08:20 UTCJun 24, 09:05 UTC45m
2026-06-24 KAL518 FRA → ICN Jun 24, 06:15 UTCJun 24, 06:39 UTC25m
2026-06-23 KAL518 FRA → ICN Jun 23, 19:34 UTCJun 24, 05:29 UTC9h 55m
2026-06-23 KAL517 - Jun 23, 16:29 UTCJun 23, 17:09 UTC40m
2026-06-22 KAL517 ICN → AMS Jun 22, 23:50 UTCJun 23, 13:00 UTC13h 10m
2026-06-22 KAL9254 IAH → DFW Jun 22, 09:00 UTCJun 22, 21:05 UTC12h 5m
2026-06-22 KAL9253 ICN → ANC Jun 22, 03:45 UTCJun 22, 06:25 UTC2h 40m
2026-06-21 KAL9253 ICN → ANC Jun 21, 19:00 UTCJun 22, 00:34 UTC5h 35m
2026-06-21 KAL9253 ICN → ANC Jun 21, 10:14 UTCJun 21, 17:50 UTC7h 35m
2026-06-21 KAL538 - Jun 21, 05:54 UTCJun 21, 06:19 UTC25m
2026-06-20 KAL538 - Jun 20, 19:40 UTCJun 21, 05:10 UTC9h 30m
2026-06-20 KAL537 VIE → FRA Jun 20, 15:19 UTCJun 20, 16:19 UTC1h 0m

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 HL7639 page for operator, model, and routing details .

Mode-S 71BE39 frequently asked

What is Mode-S code 71BE39?
71BE39 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7639.
Where is Mode-S 71BE39 registered?
Mode-S code 71BE39 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 71BE39 broadcasting right now?
No active broadcast right now. Last signal was Jul 13, 14:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BE39, octal 34337071, decimal 7,454,265.
What flights does 71BE39 operate?
Mode-S 71BE39 has broadcast 20 distinct callsigns, including KAL537, KAL214, KAL538, KAL233, KAL8256.