Apparatus

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sensors Mode-S transponder

71C335

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

Currently assigned to HL8335 · BOEING 737-800

Hex
71C335
Octal
34341465
Decimal
7,455,541
Country
KR
Tail
HL8335
Type
B738
Broadcasting now · callsign JJA1603 · 33,000 ft
Flights observed
372
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:50 UTC

Current position

71C335 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C335 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
JJA1604 - 10 2026-07-19
JJA1603 Jeju Air 10 2026-07-19
JJA5204 - 9 2026-07-07
JJA5203 - 9 2026-07-18
JJA2603 - 9 2026-07-18
JJA2104 Jeju Air 8 2026-07-22
JJA2103 Jeju Air 8 2026-07-22
JJA1504 Jeju Air 8 2026-07-23
JJA1503 Jeju Air 8 2026-07-23
JJA1396 Jeju Air 8 2026-07-26
JJA1304 - 8 2026-07-04
JJA1303 - 8 2026-07-04
JJA6001 Jeju Air 7 2026-07-24
JJA2604 - 7 2026-07-18
JJA2126 - 7 2026-07-26
JJA1702 Jeju Air 7 2026-07-23
JJA1701 Jeju Air 7 2026-07-22
JJA1622 - 7 2026-07-14
JJA1621 - 7 2026-07-14
JJA1395 Jeju Air 7 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JJA2126 - Jul 26, 12:45 UTCJul 26, 20:50 UTC8h 5m
2026-07-26 JJA8972 YNJ → ICN Jul 26, 10:30 UTCJul 26, 10:55 UTC25m
2026-07-26 JJA8971 ICN → YNJ Jul 26, 05:15 UTCJul 26, 06:15 UTC1h 0m
2026-07-26 JJA1396 KIX → ICN Jul 26, 00:10 UTCJul 26, 01:30 UTC1h 20m
2026-07-25 JJA1395 ICN → KIX Jul 25, 11:15 UTCJul 25, 12:35 UTC1h 20m
2026-07-25 JJA8504 - Jul 25, 09:30 UTCJul 25, 09:55 UTC25m
2026-07-25 JJA8503 ICN → WEH Jul 25, 07:20 UTCJul 25, 07:35 UTC15m
2026-07-25 JJA1472 FUK → ICN Jul 25, 04:55 UTCJul 25, 05:50 UTC55m
2026-07-25 JJA1471 ICN → FUK Jul 25, 02:30 UTCJul 25, 03:35 UTC1h 5m
2026-07-24 JJA2126 ICN → ICN Jul 24, 12:50 UTCJul 24, 22:40 UTC9h 50m
2026-07-24 JJA6002 MFM → ICN Jul 24, 06:20 UTCJul 24, 09:30 UTC3h 10m
2026-07-24 JJA6001 ICN → MFM Jul 24, 01:30 UTCJul 24, 04:30 UTC3h 0m
2026-07-23 JJA2402 VTE → ICN Jul 23, 11:50 UTCJul 23, 22:35 UTC10h 45m
2026-07-23 JJA1504 CTS → ICN Jul 23, 07:05 UTCJul 23, 09:40 UTC2h 35m
2026-07-23 JJA1503 ICN → CTS Jul 23, 03:25 UTCJul 23, 05:50 UTC2h 25m
2026-07-23 JJA1702 MYJ → ICN Jul 23, 00:50 UTCJul 23, 02:00 UTC1h 10m
2026-07-22 JJA1701 ICN → MYJ Jul 22, 22:15 UTCJul 22, 23:20 UTC1h 5m
2026-07-22 JJA2104 MNL → ICN Jul 22, 16:00 UTCJul 22, 19:20 UTC3h 20m
2026-07-22 JJA2103 ICN → MNL Jul 22, 01:20 UTCJul 22, 14:25 UTC13h 5m
2026-07-21 JJA2218 - Jul 21, 14:40 UTCJul 21, 23:55 UTC9h 15m
2026-07-21 JJA2217 - Jul 21, 13:00 UTCJul 21, 13:35 UTC35m
2026-07-21 JJA1616 HIJ → ICN Jul 21, 06:00 UTCJul 21, 07:10 UTC1h 10m
2026-07-21 JJA1615 ICN → HIJ Jul 21, 03:20 UTCJul 21, 04:30 UTC1h 10m
2026-07-20 JJA2316 PQC → ICN Jul 20, 10:30 UTCJul 20, 20:35 UTC10h 5m
2026-07-20 JJA2315 - Jul 20, 08:55 UTCJul 20, 09:35 UTC40m
2026-07-20 JJA8802 SJW → ICN Jul 20, 05:55 UTCJul 20, 06:25 UTC30m
2026-07-20 JJA8801 ICN → SJW Jul 20, 01:30 UTCJul 20, 01:50 UTC20m
2026-07-19 JJA2126 - Jul 19, 12:50 UTCJul 19, 22:30 UTC9h 40m
2026-07-19 JJA1604 - Jul 19, 09:20 UTCJul 19, 11:05 UTC1h 45m
2026-07-19 JJA1603 ICN → FSZ Jul 19, 06:10 UTCJul 19, 07:45 UTC1h 35m
2026-07-19 JJA1772 - Jul 19, 02:20 UTCJul 19, 03:30 UTC1h 10m
2026-07-18 JJA1771 - Jul 18, 23:45 UTCJul 19, 00:45 UTC1h 0m
2026-07-18 JJA2604 BKI → ICN Jul 18, 16:40 UTCJul 18, 21:50 UTC5h 10m
2026-07-18 JJA2603 ICN → BKI Jul 18, 10:20 UTCJul 18, 15:05 UTC4h 45m
2026-07-18 JJA5203 ICN → ICN Jul 18, 01:34 UTCJul 18, 08:35 UTC7h 1m
2026-07-17 JJA2218 - Jul 17, 23:30 UTCJul 18, 00:10 UTC40m
2026-07-17 JJA2217 - Jul 17, 13:05 UTCJul 17, 22:15 UTC9h 10m
2026-07-17 JJA6002 - Jul 17, 06:20 UTCJul 17, 09:45 UTC3h 25m
2026-07-17 JJA6001 - Jul 17, 01:35 UTCJul 17, 04:29 UTC2h 55m
2026-07-16 JJA2402 ICN → ICN Jul 16, 11:50 UTCJul 16, 23:05 UTC11h 15m
2026-07-16 JJA1504 - Jul 16, 07:05 UTCJul 16, 09:30 UTC2h 25m
2026-07-16 JJA1503 - Jul 16, 03:20 UTCJul 16, 05:30 UTC2h 10m
2026-07-16 JJA1702 - Jul 16, 00:35 UTCJul 16, 01:50 UTC1h 15m
2026-07-15 JJA1701 - Jul 15, 22:15 UTCJul 15, 23:15 UTC1h 0m
2026-07-15 JJA1408 - Jul 15, 11:05 UTCJul 15, 12:10 UTC1h 5m
2026-07-15 JJA1407 - Jul 15, 08:35 UTCJul 15, 09:45 UTC1h 10m
2026-07-15 JJA1616 - Jul 15, 05:50 UTCJul 15, 07:00 UTC1h 10m
2026-07-15 JJA1615 - Jul 15, 03:10 UTCJul 15, 04:20 UTC1h 10m
2026-07-15 JJA1396 KIX → ICN Jul 15, 00:10 UTCJul 15, 01:30 UTC1h 20m
2026-07-14 JA1395 ICN → KIX Jul 14, 10:35 UTCJul 14, 11:50 UTC1h 15m

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 HL8335 page for operator, model, and routing details .

Mode-S 71C335 frequently asked

What is Mode-S code 71C335?
71C335 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8335.
Where is Mode-S 71C335 registered?
Mode-S code 71C335 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 71C335 broadcasting right now?
Yes. Mode-S 71C335 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C335, octal 34341465, decimal 7,455,541.
What flights does 71C335 operate?
Mode-S 71C335 has broadcast 20 distinct callsigns, including JJA1604, JJA1603, JJA5204, JJA5203, JJA2603.