Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C252

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

Currently assigned to HL8252 · BOEING 777-200LR

Hex
71C252
Octal
34341122
Decimal
7,455,314
Country
KR
Tail
HL8252
Type
B77L
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
260
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S 71C252.

Country allocation

The ICAO 24-bit address 71C252 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
KAL274 Korean Air 22 2026-07-17
KAL278 Korean Air 15 2026-07-01
KAL277 - 15 2026-07-01
KAL273 - 14 2026-07-16
KAL249 Korean Air 14 2026-07-26
KAL284 - 8 2026-07-23
KAL283 Korean Air 8 2026-07-23
KAL9575 - 7 2026-07-03
KAL282 Korean Air 7 2026-07-21
KAL542 - 6 2026-07-14
KAL541 - 6 2026-07-14
KAL224 Korean Air 6 2026-07-25
KAL207 Korean Air 6 2026-07-24
KAL8250 - 5 2026-07-10
KAL9231 Korean Air 4 2026-05-24
KAL8552 - 4 2026-07-15
KAL8551 - 4 2026-07-15
KAL8313 Korean Air 4 2026-07-19
KAL8203 Korean Air 4 2026-06-05
KAL322 - 4 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL249 PVG → ANC Jul 26, 17:10 UTCJul 26, 22:30 UTC5h 20m
2026-07-26 KAL322 - Jul 26, 00:05 UTCJul 26, 00:30 UTC25m
2026-07-25 KAL321 - Jul 25, 15:40 UTCJul 25, 16:05 UTC25m
2026-07-25 KAL224 LAX → NRT Jul 25, 11:30 UTCJul 25, 13:20 UTC1h 50m
2026-07-24 KAL224 LAX → NRT Jul 24, 21:30 UTCJul 25, 07:40 UTC10h 10m
2026-07-24 KAL207 ICN → LAX Jul 24, 08:15 UTCJul 24, 19:30 UTC11h 15m
2026-07-23 KAL284 YYZ → ANC Jul 23, 11:50 UTCJul 24, 02:00 UTC14h 10m
2026-07-23 KAL284 ORD → YYZ Jul 23, 08:55 UTCJul 23, 09:55 UTC1h 0m
2026-07-23 KAL283 ANC → ORD Jul 23, 01:35 UTCJul 23, 06:30 UTC4h 55m
2026-07-22 KAL283 ANC → ORD Jul 22, 17:05 UTCJul 23, 00:15 UTC7h 10m
2026-07-21 KAL282 ANC → ICN Jul 21, 04:00 UTCJul 21, 12:35 UTC8h 35m
2026-07-20 KAL282 ANC → ICN Jul 20, 19:35 UTCJul 21, 02:50 UTC7h 14m
2026-07-20 KAL282 ANC → ICN Jul 20, 15:55 UTCJul 20, 17:40 UTC1h 45m
2026-07-20 KAL281 ICN → YYZ Jul 20, 01:25 UTCJul 20, 14:20 UTC12h 55m
2026-07-19 KAL8314 HKG → ICN Jul 19, 08:30 UTCJul 19, 11:45 UTC3h 15m
2026-07-19 KAL8313 ICN → HKG Jul 19, 03:25 UTCJul 19, 06:30 UTC3h 5m
2026-07-18 KAL322 - Jul 18, 23:30 UTCJul 19, 00:10 UTC40m
2026-07-18 KAL321 - Jul 18, 15:50 UTCJul 18, 16:15 UTC25m
2026-07-17 KAL274 LAX → ICN Jul 17, 22:40 UTCJul 18, 10:30 UTC11h 51m
2026-07-17 KAL274 LAX → ICN Jul 17, 12:50 UTCJul 17, 20:20 UTC7h 30m
2026-07-17 KAL274 LAX → ICN Jul 17, 03:34 UTCJul 17, 04:10 UTC35m
2026-07-17 KAL274 LAX → ICN Jul 17, 00:14 UTCJul 17, 02:59 UTC2h 45m
2026-07-16 KAL273 - Jul 16, 14:29 UTCJul 16, 22:00 UTC7h 30m
2026-07-16 KAL273 - Jul 16, 04:30 UTCJul 16, 12:00 UTC7h 30m
2026-07-15 KAL273 ICN → ANC Jul 15, 19:40 UTCJul 16, 03:20 UTC7h 40m
2026-07-15 KAL8552 - Jul 15, 12:15 UTCJul 15, 14:15 UTC2h 0m
2026-07-15 KAL8551 - Jul 15, 07:25 UTCJul 15, 09:25 UTC2h 0m
2026-07-14 KAL542 - Jul 14, 22:10 UTCJul 14, 22:30 UTC20m
2026-07-14 KAL542 - Jul 14, 11:15 UTCJul 14, 21:20 UTC10h 5m
2026-07-14 KAL541 VIE → OSL Jul 14, 07:15 UTCJul 14, 09:15 UTC2h 0m
2026-07-13 KAL541 ICN → VIE Jul 13, 17:10 UTCJul 14, 04:55 UTC11h 45m
2026-07-13 KAL312 HKG → ICN Jul 13, 08:40 UTCJul 13, 11:45 UTC3h 5m
2026-07-13 KAL311 ICN → HKG Jul 13, 02:55 UTCJul 13, 06:01 UTC3h 5m
2026-07-12 KAL250 JFK → ICN Jul 12, 06:01 UTCJul 12, 20:10 UTC14h 10m
2026-07-11 KAL249 - Jul 11, 20:15 UTCJul 12, 02:30 UTC6h 15m
2026-07-11 KAL249 ICN → ANC Jul 11, 06:20 UTCJul 11, 18:55 UTC12h 35m
2026-07-10 KAL8250 ANC → ICN Jul 10, 20:05 UTCJul 11, 04:01 UTC7h 56m
2026-07-10 KAL8250 JFK → ANC Jul 10, 11:45 UTCJul 10, 18:35 UTC6h 50m
2026-07-10 KAL249 ANC → JFK Jul 10, 02:30 UTCJul 10, 09:00 UTC6h 30m
2026-07-09 KAL249 - Jul 9, 17:50 UTCJul 10, 01:20 UTC7h 30m
2026-07-08 KAL249 - Jul 8, 17:15 UTCJul 8, 17:55 UTC40m
2026-07-07 KAL8284 - Jul 7, 23:50 UTCJul 8, 14:00 UTC14h 10m
2026-07-07 KAL8284 - Jul 7, 20:05 UTCJul 7, 21:05 UTC1h 0m
2026-07-07 KAL8283 ANC → ORD Jul 7, 12:10 UTCJul 7, 17:45 UTC5h 35m
2026-07-07 KAL8283 ICN → ANC Jul 7, 03:25 UTCJul 7, 11:05 UTC7h 40m
2026-07-06 KAL314 HKG → HKG Jul 6, 19:00 UTCJul 6, 22:10 UTC3h 10m
2026-07-06 KAL313 - Jul 6, 14:00 UTCJul 6, 16:25 UTC2h 25m
2026-07-06 KAL313 - Jul 6, 13:30 UTCJul 6, 13:55 UTC25m
2026-07-05 KAL258 JFK → ICN Jul 5, 07:50 UTCJul 5, 21:50 UTC14h 0m
2026-07-04 KAL257 ANC → JFK Jul 4, 22:15 UTCJul 5, 04:50 UTC6h 35m

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 HL8252 page for operator, model, and routing details .

Mode-S 71C252 frequently asked

What is Mode-S code 71C252?
71C252 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8252.
Where is Mode-S 71C252 registered?
Mode-S code 71C252 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 71C252 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C252, octal 34341122, decimal 7,455,314.
What flights does 71C252 operate?
Mode-S 71C252 has broadcast 20 distinct callsigns, including KAL274, KAL278, KAL277, KAL273, KAL249.