Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BE23

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

Currently assigned to HL7623 · BOEING 747-8

Hex
71BE23
Octal
34337043
Decimal
7,454,243
Country
KR
Tail
HL7623
Type
B748
No current signal · last broadcast 4h ago
Flights observed
246
Distinct callsigns
20
Country
KR
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 71BE23.

Country allocation

The ICAO 24-bit address 71BE23 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
KAL8592 Korean Air 21 2026-06-13
KAL591 Korean Air 20 2026-06-12
KAL214 - 16 2026-07-14
KAL233 - 15 2026-07-10
KAL8256 - 10 2026-07-05
KAL510 - 10 2026-07-13
KAL554 - 9 2026-07-09
KAL553 - 9 2026-07-09
KAL8255 - 8 2026-07-05
KAL509 - 8 2026-07-12
KAL261 Korean Air 8 2026-05-13
KAL213 - 8 2026-07-13
KAL537 Korean Air 7 2026-05-23
KAL517 Korean Air 7 2026-05-26
KAL538 Korean Air 6 2026-05-24
KAL259 - 6 2026-06-28
KAL518 Korean Air 5 2026-05-27
KAL234 - 5 2026-07-10
KAL9204 - 4 2026-07-07
KAL9203 Korean Air 4 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL214 - Jul 14, 10:40 UTCJul 14, 11:15 UTC35m
2026-07-14 KAL214 - Jul 14, 07:25 UTCJul 14, 08:10 UTC45m
2026-07-13 KAL213 - Jul 13, 17:50 UTCJul 14, 04:50 UTC11h 0m
2026-07-13 KAL510 - Jul 13, 05:35 UTCJul 13, 05:55 UTC20m
2026-07-12 KAL510 - Jul 12, 19:01 UTCJul 13, 04:50 UTC9h 50m
2026-07-12 KAL509 - Jul 12, 03:35 UTCJul 12, 15:25 UTC11h 50m
2026-07-12 KAL509 - Jul 12, 02:30 UTCJul 12, 02:45 UTC15m
2026-07-11 KAL318 - Jul 11, 08:55 UTCJul 11, 09:20 UTC25m
2026-07-11 KAL317 - Jul 11, 02:45 UTCJul 11, 03:05 UTC20m
2026-07-10 KAL234 SEA → ICN Jul 10, 13:50 UTCJul 11, 00:20 UTC10h 31m
2026-07-10 KAL233 - Jul 10, 08:10 UTCJul 10, 11:55 UTC3h 45m
2026-07-10 KAL233 ANC → ORD Jul 10, 00:20 UTCJul 10, 05:45 UTC5h 25m
2026-07-09 KAL233 ICN → ANC Jul 9, 15:25 UTCJul 9, 22:55 UTC7h 30m
2026-07-09 KAL554 KIX → ICN Jul 9, 10:55 UTCJul 9, 12:15 UTC1h 20m
2026-07-09 KAL553 ICN → KIX Jul 9, 05:35 UTCJul 9, 07:20 UTC1h 45m
2026-07-08 KAL214 SFO → ICN Jul 8, 11:05 UTCJul 8, 22:30 UTC11h 25m
2026-07-08 KAL214 - Jul 8, 07:30 UTCJul 8, 08:25 UTC55m
2026-07-07 KAL213 - Jul 7, 17:55 UTCJul 8, 04:35 UTC10h 40m
2026-07-07 KAL9204 - Jul 7, 01:25 UTCJul 7, 13:35 UTC12h 10m
2026-07-06 KAL9203 ANC → LAX Jul 6, 12:35 UTCJul 6, 23:10 UTC10h 35m
2026-07-05 KAL8256 ANC → ICN Jul 5, 20:10 UTCJul 6, 04:40 UTC8h 30m
2026-07-05 KAL8256 ATL → ANC Jul 5, 11:25 UTCJul 5, 18:10 UTC6h 45m
2026-07-05 KAL8255 DFW → ATL Jul 5, 07:15 UTCJul 5, 08:50 UTC1h 35m
2026-07-04 KAL8255 ICN → DFW Jul 4, 16:35 UTCJul 5, 04:50 UTC12h 15m
2026-07-03 KAL8256 ANC → ICN Jul 3, 19:30 UTCJul 4, 04:55 UTC9h 25m
2026-07-03 KAL8256 ATL → ANC Jul 3, 11:25 UTCJul 3, 18:00 UTC6h 35m
2026-07-03 KAL8255 DFW → ATL Jul 3, 07:30 UTCJul 3, 09:05 UTC1h 35m
2026-07-02 KAL8255 ICN → DFW Jul 2, 16:50 UTCJul 3, 04:45 UTC11h 55m
2026-07-02 KAL318 - Jul 2, 08:50 UTCJul 2, 09:15 UTC25m
2026-07-02 KAL317 - Jul 2, 03:05 UTCJul 2, 03:25 UTC20m
2026-07-01 KAL214 SFO → ICN Jul 1, 11:05 UTCJul 1, 23:05 UTC12h 0m
2026-07-01 KAL214 - Jul 1, 07:20 UTCJul 1, 08:15 UTC55m
2026-06-30 KAL213 - Jun 30, 17:40 UTCJul 1, 04:15 UTC10h 35m
2026-06-30 KAL9204 - Jun 30, 01:50 UTCJun 30, 14:00 UTC12h 10m
2026-06-29 KAL9203 ANC → LAX Jun 29, 12:24 UTCJun 29, 22:55 UTC10h 30m
2026-06-28 KAL260 - Jun 28, 17:39 UTCJun 29, 07:05 UTC13h 25m
2026-06-28 KAL259 - Jun 28, 09:30 UTCJun 28, 15:09 UTC5h 40m
2026-06-27 KAL259 ICN → ANC Jun 27, 17:09 UTCJun 28, 08:05 UTC14h 55m
2026-06-27 KAL552 NRT → ICN Jun 27, 11:50 UTCJun 27, 13:44 UTC1h 55m
2026-06-27 KAL551 - Jun 27, 05:49 UTCJun 27, 07:45 UTC1h 55m
2026-06-26 KAL234 SEA → ICN Jun 26, 12:34 UTCJun 26, 23:30 UTC10h 55m
2026-06-26 KAL233 ORD → SEA Jun 26, 06:50 UTCJun 26, 10:39 UTC3h 50m
2026-06-25 KAL233 ANC → ORD Jun 25, 23:09 UTCJun 26, 04:34 UTC5h 25m
2026-06-25 KAL233 - Jun 25, 14:20 UTCJun 25, 21:55 UTC7h 35m
2026-06-25 KAL554 - Jun 25, 10:30 UTCJun 25, 11:50 UTC1h 20m
2026-06-25 KAL553 ICN → KIX Jun 25, 05:50 UTCJun 25, 07:05 UTC1h 15m
2026-06-24 KAL214 SFO → ICN Jun 24, 11:05 UTCJun 24, 23:04 UTC12h 0m
2026-06-24 KAL214 - Jun 24, 07:34 UTCJun 24, 08:24 UTC50m
2026-06-23 KAL213 - Jun 23, 17:54 UTCJun 24, 04:20 UTC10h 25m
2026-06-23 KAL9204 LAX → ICN Jun 23, 02:55 UTCJun 23, 15:09 UTC12h 15m

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 HL7623 page for operator, model, and routing details .

Mode-S 71BE23 frequently asked

What is Mode-S code 71BE23?
71BE23 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7623.
Where is Mode-S 71BE23 registered?
Mode-S code 71BE23 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 71BE23 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BE23, octal 34337043, decimal 7,454,243.
What flights does 71BE23 operate?
Mode-S 71BE23 has broadcast 20 distinct callsigns, including KAL8592, KAL591, KAL214, KAL233, KAL8256.