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sensors Mode-S transponder

71BC17

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

Currently assigned to HL7417 · BOEING 747-400

Hex
71BC17
Octal
34336027
Decimal
7,453,719
Country
KR
Tail
HL7417
Type
B744
No current signal · last broadcast Jul 26, 17:45 UTC
Flights observed
237
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 17:45 UTC

Last known position

Most recent position reported by Mode-S 71BC17.

Country allocation

The ICAO 24-bit address 71BC17 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
AIH242 Alpine Air Chile 24 2026-07-26
AIH248 - 18 2026-07-06
AIH247 - 15 2026-07-06
AIH967 - 14 2026-07-25
AIH587 - 14 2026-07-15
AIH968 - 9 2026-07-25
AIH969 - 8 2026-07-05
AIH952 - 7 2026-07-22
AIH588 - 7 2026-07-16
AIH970 - 6 2026-07-05
AIH795 Alpine Air Chile 6 2026-06-17
AIH794 - 6 2026-07-03
AIH793 - 6 2026-07-03
AIH281 - 6 2026-07-20
AIH241 Alpine Air Chile 6 2026-07-26
AIH954 - 5 2026-07-19
AIH796 Alpine Air Chile 5 2026-06-17
AIH958 - 4 2026-07-21
AIH938 - 4 2026-06-28
AIH934 - 4 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AIH241 SEA → ICN Jul 26, 17:10 UTCJul 26, 17:45 UTC35m
2026-07-26 AIH242 ANC → ORD Jul 26, 11:30 UTCJul 26, 14:50 UTC3h 20m
2026-07-26 AIH242 ANC → ORD Jul 26, 07:45 UTCJul 26, 09:25 UTC1h 40m
2026-07-25 AIH242 ANC → ORD Jul 25, 23:35 UTCJul 26, 04:55 UTC5h 20m
2026-07-25 AIH242 ANC → ORD Jul 25, 14:50 UTCJul 25, 22:10 UTC7h 20m
2026-07-25 AIH968 - Jul 25, 06:10 UTCJul 25, 09:05 UTC2h 55m
2026-07-25 AIH967 - Jul 25, 00:30 UTCJul 25, 03:45 UTC3h 15m
2026-07-24 AIH790 - Jul 24, 10:50 UTCJul 24, 13:00 UTC2h 10m
2026-07-24 AIH789 VIE → MXP Jul 24, 06:20 UTCJul 24, 07:20 UTC1h 0m
2026-07-23 AIH789 ICN → VIE Jul 23, 14:20 UTCJul 24, 04:20 UTC14h 0m
2026-07-22 AIH998 - Jul 22, 12:20 UTCJul 22, 12:40 UTC20m
2026-07-22 AIH952 HKG → ICN Jul 22, 01:45 UTCJul 22, 04:45 UTC3h 0m
2026-07-21 AIH952 - Jul 21, 22:40 UTCJul 21, 23:10 UTC30m
2026-07-21 AIH952 - Jul 21, 21:45 UTCJul 21, 21:55 UTC10m
2026-07-21 AIH951 - Jul 21, 15:15 UTCJul 21, 15:50 UTC35m
2026-07-21 AIH958 ICN → ICN Jul 21, 01:50 UTCJul 21, 08:10 UTC6h 20m
2026-07-20 AIH281 - Jul 20, 17:10 UTCJul 20, 19:25 UTC2h 15m
2026-07-20 AIH281 - Jul 20, 07:45 UTCJul 20, 08:55 UTC1h 10m
2026-07-19 AIH2821 ICN → ANC Jul 19, 23:50 UTCJul 20, 04:40 UTC4h 50m
2026-07-19 AIH2821 ICN → ANC Jul 19, 14:40 UTCJul 19, 22:15 UTC7h 35m
2026-07-19 AIH954 HKG → ICN Jul 19, 02:05 UTCJul 19, 05:10 UTC3h 5m
2026-07-18 AIH954 - Jul 18, 22:35 UTCJul 18, 23:15 UTC40m
2026-07-18 AIH954 - Jul 18, 21:40 UTCJul 18, 21:50 UTC10m
2026-07-18 AIH953 - Jul 18, 15:10 UTCJul 18, 15:35 UTC25m
2026-07-18 AIH968 HKG → ICN Jul 18, 06:30 UTCJul 18, 09:40 UTC3h 10m
2026-07-18 AIH967 - Jul 18, 00:29 UTCJul 18, 03:25 UTC2h 56m
2026-07-16 AIH988 ICN → ICN Jul 16, 23:29 UTCJul 17, 09:10 UTC9h 40m
2026-07-16 AIH588 - Jul 16, 05:10 UTCJul 16, 05:30 UTC20m
2026-07-16 AIH588 - Jul 16, 04:00 UTCJul 16, 04:20 UTC20m
2026-07-15 AIH588 - Jul 15, 18:35 UTCJul 15, 22:25 UTC3h 50m
2026-07-15 AIH587 JFK → BRU Jul 15, 09:45 UTCJul 15, 16:35 UTC6h 50m
2026-07-14 AIH587 - Jul 14, 23:40 UTCJul 15, 05:35 UTC5h 55m
2026-07-14 AIH587 ICN → ANC Jul 14, 14:25 UTCJul 14, 22:20 UTC7h 55m
2026-07-13 AIH934 - Jul 13, 22:35 UTCJul 14, 06:00 UTC7h 25m
2026-07-13 AIH933 - Jul 13, 15:55 UTCJul 13, 18:25 UTC2h 30m
2026-07-12 AIH241 SEA → ICN Jul 12, 17:20 UTCJul 13, 04:05 UTC10h 45m
2026-07-12 AIH242 DFW → SEA Jul 12, 11:40 UTCJul 12, 15:10 UTC3h 30m
2026-07-12 AIH242 ORD → DFW Jul 12, 07:55 UTCJul 12, 09:35 UTC1h 40m
2026-07-11 AIH242 - Jul 11, 23:45 UTCJul 12, 05:10 UTC5h 25m
2026-07-11 AIH242 ICN → ANC Jul 11, 14:30 UTCJul 11, 22:15 UTC7h 45m
2026-07-10 AIH958 ICN → ICN Jul 10, 23:20 UTCJul 11, 05:15 UTC5h 55m
2026-07-10 AIH988 ICN → ICN Jul 10, 00:05 UTCJul 10, 06:30 UTC6h 25m
2026-07-09 AIH396 - Jul 9, 16:35 UTCJul 9, 21:20 UTC4h 45m
2026-07-09 AIH396 - Jul 9, 12:10 UTCJul 9, 14:10 UTC2h 0m
2026-07-09 AIH395 - Jul 9, 09:05 UTCJul 9, 09:30 UTC25m
2026-07-09 AIH395 - Jul 9, 03:55 UTCJul 9, 06:15 UTC2h 20m
2026-07-08 AIH285 SFO → ICN Jul 8, 11:35 UTCJul 8, 23:05 UTC11h 30m
2026-07-08 AIH2861 - Jul 8, 07:45 UTCJul 8, 08:35 UTC50m
2026-07-08 AIH2861 ANC → LAX Jul 8, 00:30 UTCJul 8, 04:55 UTC4h 25m
2026-07-07 AIH2861 ICN → ANC Jul 7, 14:55 UTCJul 7, 22:25 UTC7h 30m

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 HL7417 page for operator, model, and routing details .

Mode-S 71BC17 frequently asked

What is Mode-S code 71BC17?
71BC17 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7417.
Where is Mode-S 71BC17 registered?
Mode-S code 71BC17 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 71BC17 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BC17, octal 34336027, decimal 7,453,719.
What flights does 71BC17 operate?
Mode-S 71BC17 has broadcast 20 distinct callsigns, including AIH242, AIH248, AIH247, AIH967, AIH587.