Apparatus

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sensors Mode-S transponder

71E276

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

Currently assigned to HL-C276

Hex
71E276
Octal
34361166
Decimal
7,463,542
Country
KR
Tail
HL-C276
Type
ULAC
No current signal · last broadcast 16h ago
Flights observed
165
Distinct callsigns
1
Country
KR
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 71E276.

Country allocation

The ICAO 24-bit address 71E276 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 1 distinct

Callsign Airline Flights Last seen
HLC276 - 159 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 HLC276 - Jul 17, 09:20 UTCJul 17, 10:05 UTC45m
2026-07-17 HLC276 - Jul 17, 08:40 UTCJul 17, 08:49 UTC10m
2026-07-17 HLC276 - Jul 17, 07:30 UTCJul 17, 08:10 UTC40m
2026-07-17 HLC276 - Jul 17, 05:10 UTCJul 17, 06:54 UTC1h 45m
2026-07-17 HLC276 - Jul 17, 04:04 UTCJul 17, 04:35 UTC30m
2026-07-17 HLC276 - Jul 17, 03:10 UTCJul 17, 03:25 UTC15m
2026-07-17 HLC276 - Jul 17, 00:25 UTCJul 17, 01:35 UTC1h 10m
2026-07-16 HLC276 - Jul 16, 07:10 UTCJul 16, 08:35 UTC1h 25m
2026-07-16 HLC276 - Jul 16, 04:55 UTCJul 16, 05:20 UTC25m
2026-07-16 HLC276 - Jul 16, 03:40 UTCJul 16, 04:00 UTC20m
2026-07-16 HLC276 - Jul 16, 01:35 UTCJul 16, 01:55 UTC20m
2026-07-15 HLC276 - Jul 15, 23:50 UTCJul 16, 00:30 UTC40m
2026-07-13 HLC276 - Jul 13, 09:30 UTCJul 13, 09:45 UTC15m
2026-07-13 HLC276 - Jul 13, 06:10 UTCJul 13, 06:30 UTC20m
2026-07-13 HLC276 - Jul 13, 00:15 UTCJul 13, 00:40 UTC25m
2026-07-12 HLC276 - Jul 12, 23:05 UTCJul 12, 23:20 UTC15m
2026-07-12 HLC276 - Jul 12, 04:25 UTCJul 12, 05:10 UTC45m
2026-07-12 HLC276 - Jul 12, 01:45 UTCJul 12, 01:55 UTC10m
2026-07-12 HLC276 - Jul 12, 00:20 UTCJul 12, 00:55 UTC35m
2026-07-11 HLC276 - Jul 11, 00:30 UTCJul 11, 00:55 UTC25m
2026-07-10 HLC276 - Jul 10, 23:05 UTCJul 10, 23:45 UTC40m
2026-07-07 HLC276 - Jul 7, 04:05 UTCJul 7, 04:30 UTC25m
2026-07-04 HLC276 - Jul 4, 09:45 UTCJul 4, 10:15 UTC30m
2026-07-04 HLC276 - Jul 4, 06:15 UTCJul 4, 07:35 UTC1h 20m
2026-07-03 - - Jul 3, 08:50 UTCJul 3, 09:10 UTC20m
2026-07-03 HLC276 - Jul 3, 02:35 UTCJul 3, 02:45 UTC10m
2026-06-28 HLC276 - Jun 28, 02:25 UTCJun 28, 02:34 UTC10m
2026-06-25 HLC276 - Jun 25, 08:24 UTCJun 25, 08:55 UTC30m
2026-06-25 HLC276 - Jun 25, 03:40 UTCJun 25, 03:59 UTC20m
2026-06-24 HLC276 - Jun 24, 09:49 UTCJun 24, 10:14 UTC25m
2026-06-23 HLC276 - Jun 23, 09:20 UTCJun 23, 10:29 UTC1h 10m
2026-06-23 HLC276 - Jun 23, 07:45 UTCJun 23, 08:20 UTC35m
2026-06-23 HLC276 - Jun 23, 05:59 UTCJun 23, 06:59 UTC1h 0m
2026-06-23 HLC276 - Jun 23, 01:59 UTCJun 23, 03:00 UTC1h 0m
2026-06-22 HLC276 - Jun 22, 07:00 UTCJun 22, 07:19 UTC20m
2026-06-22 HLC276 - Jun 22, 04:54 UTCJun 22, 05:20 UTC25m
2026-06-22 HLC276 - Jun 22, 01:10 UTCJun 22, 02:19 UTC1h 10m
2026-06-21 HLC276 - Jun 21, 09:20 UTCJun 21, 10:40 UTC1h 20m
2026-06-21 HLC276 - Jun 21, 05:00 UTCJun 21, 07:40 UTC2h 40m
2026-06-21 HLC276 - Jun 21, 02:24 UTCJun 21, 03:34 UTC1h 10m
2026-06-16 HLC276 - Jun 16, 08:30 UTCJun 16, 08:55 UTC25m
2026-06-15 HLC276 - Jun 15, 05:55 UTCJun 15, 06:30 UTC35m
2026-06-14 HLC276 - Jun 14, 09:25 UTCJun 14, 10:05 UTC40m
2026-06-14 HLC276 - Jun 14, 07:05 UTCJun 14, 08:10 UTC1h 5m
2026-06-14 HLC276 - Jun 14, 04:25 UTCJun 14, 06:30 UTC2h 5m
2026-06-14 HLC276 - Jun 14, 00:40 UTCJun 14, 01:00 UTC20m
2026-06-13 HLC276 - Jun 13, 23:50 UTCJun 14, 00:05 UTC15m
2026-06-13 HLC276 - Jun 13, 10:05 UTCJun 13, 10:30 UTC25m
2026-06-13 HLC276 - Jun 13, 07:25 UTCJun 13, 09:25 UTC2h 0m
2026-06-13 HLC276 - Jun 13, 01:45 UTCJun 13, 02:35 UTC50m

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 HL-C276 page for operator, model, and routing details .

Mode-S 71E276 frequently asked

What is Mode-S code 71E276?
71E276 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL-C276.
Where is Mode-S 71E276 registered?
Mode-S code 71E276 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 71E276 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71E276, octal 34361166, decimal 7,463,542.
What flights does 71E276 operate?
Mode-S 71E276 has broadcast 1 distinct callsign, including HLC276.