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sensors Mode-S transponder

71BC19

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

Currently assigned to HL7419 · BOEING 747-400

Hex
71BC19
Octal
34336031
Decimal
7,453,721
Country
KR
Tail
HL7419
Type
B744
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
280
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S 71BC19.

Country allocation

The ICAO 24-bit address 71BC19 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
AIH587 - 47 2026-07-01
AIH588 - 24 2026-07-02
AIH242 Alpine Air Chile 16 2026-05-17
AIH396 - 13 2026-07-21
AIH795 Alpine Air Chile 11 2026-06-13
AIH967 - 9 2026-07-11
AIH797 - 9 2026-05-25
AIH798 - 8 2026-05-25
AIH775 - 8 2026-07-23
AIH395 - 8 2026-07-21
AIH968 - 7 2026-07-11
AIH796 Alpine Air Chile 7 2026-06-13
AIH794 - 7 2026-07-20
AIH793 Alpine Air Chile 7 2026-07-20
AIH789 - 7 2026-07-03
AIH776 - 7 2026-07-23
AIH970 - 6 2026-07-17
AIH969 - 6 2026-07-17
AIH952 - 6 2026-07-25
AIH790 - 6 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AIH285 SFO → ICN Jul 26, 20:30 UTCJul 26, 21:00 UTC30m
2026-07-26 AIH2861 LAX → SFO Jul 26, 16:55 UTCJul 26, 17:45 UTC50m
2026-07-25 AIH2861 LAX → SFO Jul 25, 23:55 UTCJul 26, 04:35 UTC4h 40m
2026-07-25 AIH2861 LAX → SFO Jul 25, 15:00 UTCJul 25, 22:25 UTC7h 25m
2026-07-25 AIH952 HKG → ICN Jul 25, 03:20 UTCJul 25, 06:20 UTC3h 0m
2026-07-24 AIH952 - Jul 24, 23:40 UTCJul 25, 00:10 UTC30m
2026-07-24 AIH952 - Jul 24, 22:40 UTCJul 24, 22:55 UTC15m
2026-07-24 AIH951 - Jul 24, 18:30 UTCJul 24, 18:55 UTC25m
2026-07-24 AIH951 - Jul 24, 15:10 UTCJul 24, 15:45 UTC35m
2026-07-23 AIH776 FRA → ICN Jul 23, 11:25 UTCJul 23, 22:20 UTC10h 55m
2026-07-23 AIH775 VIE → FRA Jul 23, 07:05 UTCJul 23, 08:10 UTC1h 5m
2026-07-22 AIH775 ICN → VIE Jul 22, 14:45 UTCJul 23, 04:50 UTC14h 5m
2026-07-21 AIH396 - Jul 21, 17:15 UTCJul 21, 22:05 UTC4h 50m
2026-07-21 AIH396 - Jul 21, 12:40 UTCJul 21, 14:35 UTC1h 55m
2026-07-21 AIH395 - Jul 21, 04:20 UTCJul 21, 09:55 UTC5h 35m
2026-07-20 AIH794 - Jul 20, 23:45 UTCJul 21, 00:05 UTC20m
2026-07-20 AIH794 - Jul 20, 13:35 UTCJul 20, 23:00 UTC9h 25m
2026-07-20 AIH793 STN → FRA Jul 20, 10:10 UTCJul 20, 11:15 UTC1h 5m
2026-07-19 AIH793 STN → FRA Jul 19, 15:05 UTCJul 20, 07:45 UTC16h 40m
2026-07-19 AIH938 ICN → ICN Jul 19, 01:20 UTCJul 19, 07:45 UTC6h 25m
2026-07-18 AIH958 ICN → ICN Jul 18, 01:34 UTCJul 18, 09:00 UTC7h 26m
2026-07-17 AIH970 HKG → ICN Jul 17, 06:54 UTCJul 17, 10:00 UTC3h 5m
2026-07-17 AIH969 ICN → HKG Jul 17, 01:20 UTCJul 17, 04:20 UTC3h 0m
2026-07-16 AIH396 - Jul 16, 19:25 UTCJul 16, 22:10 UTC2h 45m
2026-07-16 AIH396 - Jul 16, 17:20 UTCJul 16, 17:30 UTC10m
2026-07-16 AIH396 - Jul 16, 13:00 UTCJul 16, 15:00 UTC2h 0m
2026-07-16 AIH395 - Jul 16, 03:55 UTCJul 16, 09:35 UTC5h 40m
2026-07-15 AIH998 - Jul 15, 16:55 UTCJul 15, 17:20 UTC25m
2026-07-15 AIH997 - Jul 15, 12:05 UTCJul 15, 12:30 UTC25m
2026-07-15 AIH987 ICN → ICN Jul 15, 01:45 UTCJul 15, 08:55 UTC7h 10m
2026-07-14 AIH283 SFO → ICN Jul 14, 11:25 UTCJul 14, 22:50 UTC11h 24m
2026-07-14 AIH2841 - Jul 14, 07:40 UTCJul 14, 08:30 UTC50m
2026-07-13 AIH2841 - Jul 13, 23:55 UTCJul 14, 04:45 UTC4h 50m
2026-07-13 AIH2841 ICN → ANC Jul 13, 14:50 UTCJul 13, 22:20 UTC7h 30m
2026-07-12 AIH285 SFO → ICN Jul 12, 11:30 UTCJul 12, 22:50 UTC11h 20m
2026-07-12 AIH2861 - Jul 12, 07:20 UTCJul 12, 08:10 UTC50m
2026-07-11 AIH2861 - Jul 11, 23:55 UTCJul 12, 04:30 UTC4h 35m
2026-07-11 AIH2861 ICN → ANC Jul 11, 14:45 UTCJul 11, 22:15 UTC7h 30m
2026-07-11 AIH968 HKG → ICN Jul 11, 05:50 UTCJul 11, 08:45 UTC2h 55m
2026-07-11 AIH967 ICN → HKG Jul 11, 00:30 UTCJul 11, 03:30 UTC3h 0m
2026-07-10 AIH970 - Jul 10, 08:40 UTCJul 10, 09:25 UTC45m
2026-07-10 AIH970 - Jul 10, 06:20 UTCJul 10, 06:35 UTC15m
2026-07-10 AIH969 - Jul 10, 00:40 UTCJul 10, 03:50 UTC3h 10m
2026-07-09 AIH776 - Jul 9, 20:50 UTCJul 9, 21:15 UTC25m
2026-07-09 AIH776 - Jul 9, 10:35 UTCJul 9, 19:45 UTC9h 10m
2026-07-09 AIH775 VIE → FRA Jul 9, 06:45 UTCJul 9, 07:50 UTC1h 5m
2026-07-08 AIH775 - Jul 8, 14:30 UTCJul 9, 04:45 UTC14h 15m
2026-07-08 AIH970 HKG → ICN Jul 8, 07:15 UTCJul 8, 10:20 UTC3h 5m
2026-07-08 AIH969 ICN → HKG Jul 8, 01:30 UTCJul 8, 04:35 UTC3h 5m
2026-07-07 AIH396 - Jul 7, 17:50 UTCJul 7, 22:35 UTC4h 45m

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 HL7419 page for operator, model, and routing details .

Mode-S 71BC19 frequently asked

What is Mode-S code 71BC19?
71BC19 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7419.
Where is Mode-S 71BC19 registered?
Mode-S code 71BC19 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 71BC19 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BC19, octal 34336031, decimal 7,453,721.
What flights does 71BC19 operate?
Mode-S 71BC19 has broadcast 20 distinct callsigns, including AIH587, AIH588, AIH242, AIH396, AIH795.