Apparatus

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sensors Mode-S transponder

71C077

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

Currently assigned to HL8077 · BOEING 777-200LR

Hex
71C077
Octal
34340167
Decimal
7,454,839
Country
KR
Tail
HL8077
Type
B77L
Broadcasting now · callsign KAL314 · 35,000 ft
Flights observed
286
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:55 UTC

Current position

71C077 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C077 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
KAL273 Korean Air 25 2026-06-11
KAL274 Korean Air 20 2026-06-12
KAL313 - 19 2026-07-26
KAL504 - 15 2026-07-10
KAL541 - 12 2026-07-08
KAL314 Korean Air 12 2026-07-26
KAL8284 - 9 2026-07-01
KAL8283 - 9 2026-06-30
KAL503 - 9 2026-07-09
KAL568 Korean Air 8 2026-07-20
KAL542 - 8 2026-07-08
KAL249 Korean Air 8 2026-07-25
KAL9565 - 6 2026-07-17
KAL8517 Korean Air 6 2026-05-29
KAL8250 Korean Air 6 2026-07-24
KAL8231 - 6 2026-07-11
KAL567 Korean Air 6 2026-07-19
KAL285 Korean Air 6 2026-05-16
KAL8518 Korean Air 4 2026-05-30
KAL530 Korean Air 4 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL314 HKG → HKG Jul 26, 19:25 UTCJul 26, 20:55 UTC1h 30m
2026-07-26 KAL313 - Jul 26, 16:40 UTCJul 26, 16:55 UTC15m
2026-07-26 KAL313 - Jul 26, 13:55 UTCJul 26, 16:05 UTC2h 10m
2026-07-25 KAL250 JFK → ICN Jul 25, 16:50 UTCJul 26, 07:35 UTC14h 46m
2026-07-25 KAL249 PVG → ANC Jul 25, 07:50 UTCJul 25, 14:00 UTC6h 10m
2026-07-24 KAL249 PVG → ANC Jul 24, 17:10 UTCJul 25, 06:30 UTC13h 20m
2026-07-24 KAL8250 ATL → ANC Jul 24, 04:05 UTCJul 24, 12:50 UTC8h 45m
2026-07-23 KAL8250 ATL → ANC Jul 23, 19:30 UTCJul 24, 02:20 UTC6h 50m
2026-07-23 KAL8250 ATL → ANC Jul 23, 16:25 UTCJul 23, 17:35 UTC1h 10m
2026-07-23 KAL249 PVG → ANC Jul 23, 07:35 UTCJul 23, 13:30 UTC5h 55m
2026-07-22 KAL249 PVG → ANC Jul 22, 17:15 UTCJul 23, 06:15 UTC13h 0m
2026-07-22 KAL8314 - Jul 22, 04:30 UTCJul 22, 12:45 UTC8h 15m
2026-07-21 KAL8236 ORD → ANC Jul 21, 15:30 UTCJul 21, 23:55 UTC8h 25m
2026-07-21 KAL8236 ORD → ANC Jul 21, 07:05 UTCJul 21, 14:20 UTC7h 15m
2026-07-21 KAL8235 LAX → ORD Jul 21, 03:30 UTCJul 21, 04:55 UTC1h 25m
2026-07-20 KAL8235 LAX → ORD Jul 20, 19:40 UTCJul 21, 00:50 UTC5h 9m
2026-07-20 KAL8235 LAX → ORD Jul 20, 10:55 UTCJul 20, 18:25 UTC7h 30m
2026-07-20 KAL568 ZRH → ICN Jul 20, 05:20 UTCJul 20, 05:40 UTC20m
2026-07-19 KAL568 ZRH → ICN Jul 19, 19:00 UTCJul 20, 04:20 UTC9h 20m
2026-07-19 KAL567 ICN → SVO Jul 19, 15:25 UTCJul 19, 16:35 UTC1h 10m
2026-07-19 KAL567 ICN → SVO Jul 19, 01:10 UTCJul 19, 13:25 UTC12h 15m
2026-07-18 KAL314 HKG → ICN Jul 18, 19:15 UTCJul 18, 22:25 UTC3h 10m
2026-07-18 KAL313 - Jul 18, 13:35 UTCJul 18, 16:25 UTC2h 50m
2026-07-17 KAL9576 MXP → ICN Jul 17, 17:44 UTCJul 18, 04:20 UTC10h 36m
2026-07-17 KAL9565 VIE → MXP Jul 17, 13:15 UTCJul 17, 14:35 UTC1h 20m
2026-07-16 KAL9565 - Jul 16, 22:30 UTCJul 17, 09:50 UTC11h 20m
2026-07-16 KAL9565 - Jul 16, 14:50 UTCJul 17, 09:50 UTC19h 0m
2026-07-16 KAL9576 - Jul 16, 03:50 UTCJul 16, 04:25 UTC35m
2026-07-15 KAL9576 - Jul 15, 17:45 UTCJul 16, 03:10 UTC9h 25m
2026-07-15 KAL9565 VIE → MXP Jul 15, 14:00 UTCJul 15, 15:30 UTC1h 30m
2026-07-14 KAL9565 - Jul 14, 22:25 UTCJul 15, 09:40 UTC11h 14m
2026-07-14 KAL9565 - Jul 14, 14:40 UTCJul 14, 15:20 UTC40m
2026-07-14 KAL554 KIX → ICN Jul 14, 10:10 UTCJul 14, 11:30 UTC1h 20m
2026-07-14 KAL553 ICN → KIX Jul 14, 05:30 UTCJul 14, 06:50 UTC1h 20m
2026-07-13 KAL335 ICN → ICN Jul 13, 16:55 UTCJul 14, 00:15 UTC7h 20m
2026-07-13 KAL9232 - Jul 13, 00:01 UTCJul 13, 13:35 UTC13h 35m
2026-07-12 KAL9231 ANC → ORD Jul 12, 15:50 UTCJul 12, 21:25 UTC5h 35m
2026-07-12 KAL9231 - Jul 12, 07:01 UTCJul 12, 14:35 UTC7h 35m
2026-07-11 KAL8232 ORD → ICN Jul 11, 10:35 UTCJul 11, 23:40 UTC13h 5m
2026-07-11 KAL8231 ANC → ORD Jul 11, 02:15 UTCJul 11, 07:50 UTC5h 35m
2026-07-10 KAL8231 ICN → ANC Jul 10, 17:20 UTCJul 11, 01:05 UTC7h 46m
2026-07-10 KAL504 - Jul 10, 09:55 UTCJul 10, 10:20 UTC25m
2026-07-09 KAL504 - Jul 9, 23:30 UTCJul 10, 09:10 UTC9h 40m
2026-07-09 KAL504 LHR → CDG Jul 9, 20:40 UTCJul 9, 21:20 UTC40m
2026-07-09 KAL503 - Jul 9, 04:55 UTCJul 9, 17:05 UTC12h 10m
2026-07-09 KAL503 - Jul 9, 03:40 UTCJul 9, 03:55 UTC15m
2026-07-08 KAL542 - Jul 8, 22:15 UTCJul 8, 22:40 UTC25m
2026-07-08 KAL542 - Jul 8, 11:15 UTCJul 8, 21:35 UTC10h 20m
2026-07-08 KAL541 VIE → OSL Jul 8, 07:20 UTCJul 8, 09:35 UTC2h 15m
2026-07-07 KAL541 - Jul 7, 18:30 UTCJul 8, 05:15 UTC10h 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 HL8077 page for operator, model, and routing details .

Mode-S 71C077 frequently asked

What is Mode-S code 71C077?
71C077 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8077.
Where is Mode-S 71C077 registered?
Mode-S code 71C077 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 71C077 broadcasting right now?
Yes. Mode-S 71C077 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C077, octal 34340167, decimal 7,454,839.
What flights does 71C077 operate?
Mode-S 71C077 has broadcast 20 distinct callsigns, including KAL273, KAL274, KAL313, KAL504, KAL541.