Apparatus

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sensors Mode-S transponder

71C719

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

Currently assigned to HL8719 · BOEING 737 MAX 8

Hex
71C719
Octal
34343431
Decimal
7,456,537
Country
KR
Tail
HL8719
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
269
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C719.

Country allocation

The ICAO 24-bit address 71C719 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
JJA126 Jeju Air 20 2026-04-30
JJA134 Jeju Air 18 2026-04-30
JJA125 Jeju Air 18 2026-04-30
JJA135 Jeju Air 17 2026-04-30
JJA118 Jeju Air 17 2026-04-30
JJA113 Jeju Air 16 2026-04-30
JJA105 Jeju Air 16 2026-04-29
JJA104 Jeju Air 16 2026-04-30
JJA1103 Jeju Air 10 2026-05-30
JJA1104 Jeju Air 8 2026-05-27
JJA2516 Jeju Air 6 2026-05-24
JJA1404 Jeju Air 5 2026-05-29
JJA1403 Jeju Air 5 2026-05-29
JJA1204 Jeju Air 5 2026-05-28
JJA1203 Jeju Air 5 2026-05-28
JJA8401 Jeju Air 4 2026-05-24
JJA2515 Jeju Air 4 2026-05-24
JJA1801 Jeju Air 4 2026-05-26
JJA1174 Jeju Air 4 2026-05-19
JJA1107 Jeju Air 4 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JJA1103 NRT → ICN May 30, 01:45 UTCMay 30, 03:30 UTC1h 45m
2026-05-30 JJA1103 NRT → ICN May 30, 01:35 UTCMay 30, 01:40 UTC5m
2026-05-29 JJA1406 FUK → ICN May 29, 06:25 UTCMay 29, 10:35 UTC4h 10m
2026-05-29 JJA1404 FUK → ICN May 29, 03:55 UTCMay 29, 04:30 UTC35m
2026-05-29 JJA1403 ICN → FUK May 29, 01:15 UTCMay 29, 01:40 UTC25m
2026-05-28 JJA2304 CXR → ICN May 28, 23:20 UTCMay 28, 23:25 UTC5m
2026-05-28 JJA2303 ICN → CXR May 28, 13:10 UTCMay 28, 23:15 UTC10h 5m
2026-05-28 JJA1204 NGO → ICN May 28, 09:15 UTCMay 28, 10:45 UTC1h 30m
2026-05-28 JJA1203 ICN → NGO May 28, 06:25 UTCMay 28, 07:40 UTC1h 15m
2026-05-28 JJA1404 FUK → ICN May 28, 04:25 UTCMay 28, 04:30 UTC5m
2026-05-28 JJA1403 ICN → FUK May 28, 01:15 UTCMay 28, 04:20 UTC3h 5m
2026-05-27 JJA2304 CXR → ICN May 27, 12:40 UTCMay 27, 23:10 UTC10h 30m
2026-05-27 JJA1104 NRT → ICN May 27, 05:24 UTCMay 27, 07:30 UTC2h 6m
2026-05-27 JJA1103 NRT → ICN May 27, 01:44 UTCMay 27, 03:45 UTC2h 0m
2026-05-26 JJA1801 ICN → OKA May 26, 04:45 UTCMay 26, 09:59 UTC5h 15m
2026-05-26 JJA1302 ICN → KIX May 26, 01:30 UTCMay 26, 02:55 UTC1h 25m
2026-05-25 JJA1301 KIX → ICN May 25, 22:19 UTCMay 25, 23:40 UTC1h 20m
2026-05-25 JJA1106 NRT → ICN May 25, 08:15 UTCMay 25, 10:10 UTC1h 55m
2026-05-25 JJA1105 NRT → ICN May 25, 04:40 UTCMay 25, 06:40 UTC2h 0m
2026-05-25 JJA8402 TAO → ICN May 25, 03:00 UTCMay 25, 03:20 UTC20m
2026-05-24 JJA8401 ICN → TAO May 24, 23:20 UTCMay 24, 23:40 UTC20m
2026-05-24 JJA2516 CNX → ICN May 24, 18:15 UTCMay 24, 21:30 UTC3h 15m
2026-05-24 JJA2516 CNX → ICN May 24, 16:20 UTCMay 24, 16:35 UTC15m
2026-05-24 JJA2515 ICN → CNX May 24, 09:20 UTCMay 24, 14:15 UTC4h 55m
2026-05-24 JJA1104 NRT → ICN May 24, 05:20 UTCMay 24, 07:20 UTC2h 0m
2026-05-24 JJA1103 NRT → ICN May 24, 01:50 UTCMay 24, 03:40 UTC1h 50m
2026-05-23 JJA2114 CEB → ICN May 23, 12:10 UTCMay 23, 21:55 UTC9h 45m
2026-05-23 JJA1802 OKA → ICN May 23, 04:45 UTCMay 23, 10:15 UTC5h 30m
2026-05-23 JJA1801 ICN → OKA May 23, 04:35 UTCMay 23, 04:40 UTC5m
2026-05-23 JJA1302 ICN → KIX May 23, 01:25 UTCMay 23, 02:50 UTC1h 24m
2026-05-22 JJA1301 KIX → ICN May 22, 22:25 UTCMay 22, 23:50 UTC1h 25m
2026-05-22 JJA1308 KIX → ICN May 22, 11:15 UTCMay 22, 12:35 UTC1h 20m
2026-05-22 JJA1307 ICN → KIX May 22, 08:15 UTCMay 22, 09:35 UTC1h 20m
2026-05-22 JJA6102 TPE → ICN May 22, 04:15 UTCMay 22, 06:30 UTC2h 15m
2026-05-22 JJA6101 ICN → TPE May 22, 02:20 UTCMay 22, 02:40 UTC20m
2026-05-22 JJA6101 ICN → TPE May 22, 00:30 UTCMay 22, 00:55 UTC25m
2026-05-21 JJA2114 CEB → ICN May 21, 12:10 UTCMay 21, 22:10 UTC10h 0m
2026-05-21 JJA1106 NRT → ICN May 21, 08:10 UTCMay 21, 10:15 UTC2h 5m
2026-05-21 JJA1105 NRT → ICN May 21, 04:45 UTCMay 21, 06:50 UTC2h 5m
2026-05-21 JJA8402 TAO → ICN May 21, 02:50 UTCMay 21, 03:20 UTC30m
2026-05-20 JJA8401 ICN → TAO May 20, 23:20 UTCMay 21, 00:00 UTC40m
2026-05-20 JJA1104 NRT → ICN May 20, 05:25 UTCMay 20, 07:35 UTC2h 10m
2026-05-20 JJA1103 NRT → ICN May 20, 01:55 UTCMay 20, 03:50 UTC1h 55m
2026-05-19 JJA1204 NGO → ICN May 19, 09:20 UTCMay 19, 10:45 UTC1h 25m
2026-05-19 JJA1203 ICN → NGO May 19, 06:35 UTCMay 19, 07:55 UTC1h 20m
2026-05-19 JJA1174 NRT → PUS May 19, 02:15 UTCMay 19, 04:10 UTC1h 55m
2026-05-18 JJA1173 PUS → NRT May 18, 22:30 UTCMay 19, 00:30 UTC2h 0m
2026-05-18 JJA1432 FUK → ICN May 18, 12:05 UTCMay 18, 13:00 UTC55m
2026-05-18 JJA1431 ICN → FUK May 18, 09:35 UTCMay 18, 10:10 UTC35m
2026-05-18 JJA1104 NRT → ICN May 18, 05:45 UTCMay 18, 07:30 UTC1h 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 HL8719 page for operator, model, and routing details .

Mode-S 71C719 frequently asked

What is Mode-S code 71C719?
71C719 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8719.
Where is Mode-S 71C719 registered?
Mode-S code 71C719 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 71C719 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C719, octal 34343431, decimal 7,456,537.
What flights does 71C719 operate?
Mode-S 71C719 has broadcast 20 distinct callsigns, including JJA126, JJA134, JJA125, JJA135, JJA118.