Apparatus

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sensors Mode-S transponder

71C087

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

Currently assigned to HL8087 · BOEING 737-800

Hex
71C087
Octal
34340207
Decimal
7,454,855
Country
KR
Tail
HL8087
Type
B738
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
421
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S 71C087.

Country allocation

The ICAO 24-bit address 71C087 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
JJA1611 - 14 2026-07-18
JJA1612 Jeju Air 13 2026-07-19
JJA1601 - 12 2026-07-11
JJA1503 - 12 2026-07-14
JJA1172 - 12 2026-07-10
JJA2603 - 11 2026-07-12
JJA1602 - 11 2026-07-12
JJA1171 - 11 2026-07-10
JJA2104 - 10 2026-07-19
JJA1396 - 10 2026-07-03
JJA1395 - 10 2026-07-02
JJA2604 - 9 2026-07-12
JJA1504 - 9 2026-07-14
JJA2126 - 8 2026-07-01
JJA2103 Jeju Air 8 2026-07-19
JJA1704 - 8 2026-07-12
JJA1703 - 8 2026-07-12
JJA1402 Jeju Air 8 2026-07-20
JJA1616 Jeju Air 7 2026-07-20
JJA1615 Jeju Air 7 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJA101 GMP → CJU Jul 26, 21:35 UTCJul 26, 21:45 UTC10m
2026-07-26 JJA186 CJU → GMP Jul 26, 10:20 UTCJul 26, 11:00 UTC40m
2026-07-26 JJA8135 CJU → PKX Jul 26, 03:15 UTCJul 26, 08:20 UTC5h 6m
2026-07-26 JJA111 GMP → CJU Jul 26, 00:35 UTCJul 26, 01:10 UTC35m
2026-07-25 JJA102 CJU → GMP Jul 25, 22:30 UTCJul 25, 23:15 UTC45m
2026-07-25 JJA141 GMP → CJU Jul 25, 11:45 UTCJul 25, 12:20 UTC35m
2026-07-25 JJA132 CJU → GMP Jul 25, 10:05 UTCJul 25, 10:50 UTC45m
2026-07-25 JJA511 PUS → CJU Jul 25, 08:15 UTCJul 25, 08:35 UTC20m
2026-07-25 JJA1454 FUK → PUS Jul 25, 06:20 UTCJul 25, 06:55 UTC35m
2026-07-25 JJA1453 PUS → FUK Jul 25, 04:05 UTCJul 25, 04:40 UTC35m
2026-07-25 JJA1352 KIX → PUS Jul 25, 01:40 UTCJul 25, 02:40 UTC1h 0m
2026-07-24 JJA1351 PUS → KIX Jul 24, 23:20 UTCJul 25, 00:25 UTC1h 5m
2026-07-24 JJA2158 - Jul 24, 21:10 UTCJul 24, 21:45 UTC35m
2026-07-24 JJA2157 - Jul 24, 11:50 UTCJul 24, 20:20 UTC8h 30m
2026-07-24 JJA1454 FUK → PUS Jul 24, 06:25 UTCJul 24, 06:50 UTC25m
2026-07-24 JJA1453 PUS → FUK Jul 24, 04:10 UTCJul 24, 04:50 UTC40m
2026-07-24 JJA1352 KIX → PUS Jul 24, 01:45 UTCJul 24, 02:45 UTC1h 0m
2026-07-23 JJA1351 PUS → KIX Jul 23, 23:25 UTCJul 24, 00:30 UTC1h 5m
2026-07-23 JJA2158 - Jul 23, 21:00 UTCJul 23, 21:35 UTC35m
2026-07-23 JJA2157 - Jul 23, 12:00 UTCJul 23, 19:45 UTC7h 45m
2026-07-23 JJA512 CJU → PUS Jul 23, 10:20 UTCJul 23, 10:35 UTC15m
2026-07-23 JJA513 PUS → CJU Jul 23, 08:25 UTCJul 23, 08:35 UTC10m
2026-07-23 JJA510 CJU → PUS Jul 23, 06:50 UTCJul 23, 07:10 UTC20m
2026-07-23 JJA123 GMP → CJU Jul 23, 04:40 UTCJul 23, 05:15 UTC35m
2026-07-23 JJA114 CJU → GMP Jul 23, 03:00 UTCJul 23, 03:40 UTC40m
2026-07-23 JJA301 KWJ → CJU Jul 23, 01:20 UTCJul 23, 01:30 UTC10m
2026-07-23 JJA302 CJU → KWJ Jul 23, 00:05 UTCJul 23, 00:15 UTC10m
2026-07-22 JJA103 GMP → CJU Jul 22, 21:50 UTCJul 22, 22:25 UTC35m
2026-07-22 JJA140 CJU → GMP Jul 22, 12:55 UTCJul 22, 13:35 UTC40m
2026-07-22 JJA1327 GMP → KIX Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 JJA1326 KIX → GMP Jul 22, 02:10 UTCJul 22, 03:30 UTC1h 20m
2026-07-21 JJA1325 GMP → KIX Jul 21, 23:15 UTCJul 22, 00:45 UTC1h 30m
2026-07-21 JJA134 - Jul 21, 12:00 UTCJul 21, 12:40 UTC40m
2026-07-21 JJA135 GMP → CJU Jul 21, 09:55 UTCJul 21, 10:30 UTC35m
2026-07-21 JJA126 CJU → GMP Jul 21, 08:10 UTCJul 21, 08:55 UTC45m
2026-07-21 JJA125 GMP → CJU Jul 21, 05:55 UTCJul 21, 06:30 UTC35m
2026-07-21 JJA154 CJU → GMP Jul 21, 03:45 UTCJul 21, 04:25 UTC40m
2026-07-21 JJA153 GMP → CJU Jul 21, 01:20 UTCJul 21, 01:55 UTC35m
2026-07-20 JJA152 CJU → GMP Jul 20, 23:45 UTCJul 21, 00:25 UTC40m
2026-07-20 JJA151 GMP → CJU Jul 20, 21:50 UTCJul 20, 22:20 UTC30m
2026-07-20 JJA158 CJU → GMP Jul 20, 11:45 UTCJul 20, 12:25 UTC40m
2026-07-20 JJA167 ICN → CJU Jul 20, 09:40 UTCJul 20, 10:10 UTC30m
2026-07-20 JJA1616 HIJ → ICN Jul 20, 05:55 UTCJul 20, 07:00 UTC1h 5m
2026-07-20 JJA1615 ICN → HIJ Jul 20, 03:15 UTCJul 20, 04:35 UTC1h 20m
2026-07-20 JJA1402 FUK → ICN Jul 20, 00:10 UTCJul 20, 01:05 UTC55m
2026-07-19 JJA1401 ICN → FUK Jul 19, 21:40 UTCJul 19, 22:25 UTC45m
2026-07-19 JJA2104 - Jul 19, 15:40 UTCJul 19, 19:00 UTC3h 20m
2026-07-19 JJA2103 ICN → MNL Jul 19, 10:20 UTCJul 19, 14:10 UTC3h 50m
2026-07-19 JJA1622 UKB → ICN Jul 19, 07:00 UTCJul 19, 08:15 UTC1h 15m
2026-07-19 JJA1621 ICN → UKB Jul 19, 04:30 UTCJul 19, 05:50 UTC1h 20m

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 HL8087 page for operator, model, and routing details .

Mode-S 71C087 frequently asked

What is Mode-S code 71C087?
71C087 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8087.
Where is Mode-S 71C087 registered?
Mode-S code 71C087 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 71C087 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C087, octal 34340207, decimal 7,454,855.
What flights does 71C087 operate?
Mode-S 71C087 has broadcast 20 distinct callsigns, including JJA1611, JJA1612, JJA1601, JJA1503, JJA1172.