Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C753

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

Hex
71C753
Octal
34343523
Decimal
7,456,595
Country
KR
Broadcasting now · callsign TWB281 · 25,275 ft
Flights observed
275
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Current position

71C753 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C753 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
TWB282 - 22 2026-07-17
TWB438 - 15 2026-07-09
TWB205 - 14 2026-07-16
TWB206 - 13 2026-07-16
TWB281 - 12 2026-07-17
TWB245 - 12 2026-07-12
TWB437 - 11 2026-07-09
TWB246 - 11 2026-07-12
TWB304 - 10 2026-07-15
TWB303 - 10 2026-07-15
TWB102 - 10 2026-07-17
TWB302 - 8 2026-07-16
TWB301 - 8 2026-07-15
TWB753D Tway Airlines 7 2026-04-15
TWB208 - 6 2026-07-04
TWB207 - 6 2026-07-04
TWB202 - 6 2026-07-12
TWB201 - 6 2026-07-12
TWB101 - 6 2026-07-17
TWB734 - 5 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 TWB102 - Jul 17, 23:14 UTCJul 17, 23:50 UTC35m
2026-07-17 TWB102 - Jul 17, 21:00 UTCJul 17, 22:00 UTC1h 0m
2026-07-17 TWB102 - Jul 17, 18:40 UTCJul 17, 18:55 UTC15m
2026-07-17 TWB101 - Jul 17, 09:15 UTCJul 17, 12:10 UTC2h 55m
2026-07-17 TWB282 - Jul 17, 06:00 UTCJul 17, 07:44 UTC1h 45m
2026-07-17 TWB281 - Jul 17, 03:50 UTCJul 17, 04:10 UTC20m
2026-07-17 TWB281 - Jul 17, 02:25 UTCJul 17, 02:59 UTC35m
2026-07-16 TWB206 - Jul 16, 08:45 UTCJul 16, 09:45 UTC1h 0m
2026-07-16 TWB205 - Jul 16, 06:10 UTCJul 16, 07:05 UTC55m
2026-07-16 TWB302 KIX → ICN Jul 16, 02:55 UTCJul 16, 04:25 UTC1h 30m
2026-07-15 TWB301 - Jul 15, 23:20 UTCJul 16, 00:40 UTC1h 20m
2026-07-15 - ICN → ICN Jul 15, 23:00 UTCJul 15, 23:05 UTC5m
2026-07-15 TWB248 NRT → ICN Jul 15, 13:10 UTCJul 15, 15:05 UTC1h 55m
2026-07-15 TWB247 ICN → NRT Jul 15, 09:35 UTCJul 15, 11:30 UTC1h 55m
2026-07-15 TWB304 KIX → ICN Jul 15, 06:10 UTCJul 15, 07:30 UTC1h 20m
2026-07-15 TWB303 ICN → KIX Jul 15, 02:10 UTCJul 15, 03:35 UTC1h 25m
2026-07-14 TWB304 KIX → ICN Jul 14, 05:45 UTCJul 14, 07:15 UTC1h 30m
2026-07-14 TWB303 ICN → KIX Jul 14, 02:05 UTCJul 14, 03:25 UTC1h 20m
2026-07-13 TWB242 NRT → ICN Jul 13, 03:25 UTCJul 13, 05:15 UTC1h 50m
2026-07-12 TWB241 ICN → NRT Jul 12, 23:50 UTCJul 13, 01:55 UTC2h 5m
2026-07-12 TWB246 NRT → ICN Jul 12, 10:15 UTCJul 12, 12:05 UTC1h 50m
2026-07-12 TWB245 ICN → NRT Jul 12, 06:15 UTCJul 12, 08:10 UTC1h 55m
2026-07-12 TWB202 - Jul 12, 03:35 UTCJul 12, 04:40 UTC1h 5m
2026-07-12 TWB201 - Jul 12, 01:20 UTCJul 12, 02:05 UTC45m
2026-07-11 TWB102 - Jul 11, 22:15 UTCJul 11, 22:35 UTC20m
2026-07-11 TWB102 - Jul 11, 18:50 UTCJul 11, 19:05 UTC15m
2026-07-11 TWB102 - Jul 11, 17:35 UTCJul 11, 17:45 UTC10m
2026-07-11 TWB101 - Jul 11, 15:20 UTCJul 11, 15:40 UTC20m
2026-07-11 TWB101 - Jul 11, 10:30 UTCJul 11, 14:15 UTC3h 45m
2026-07-11 TWB304 KIX → ICN Jul 11, 05:50 UTCJul 11, 07:10 UTC1h 20m
2026-07-11 TWB303 ICN → KIX Jul 11, 02:05 UTCJul 11, 03:25 UTC1h 20m
2026-07-09 TWB438 - Jul 9, 23:45 UTCJul 10, 00:05 UTC20m
2026-07-09 TWB437 - Jul 9, 10:10 UTCJul 9, 22:55 UTC12h 45m
2026-07-09 TWB282 - Jul 9, 06:50 UTCJul 9, 07:30 UTC40m
2026-07-09 TWB282 - Jul 9, 05:45 UTCJul 9, 05:55 UTC10m
2026-07-09 TWB281 - Jul 9, 02:30 UTCJul 9, 04:10 UTC1h 40m
2026-07-08 TWB438 - Jul 8, 23:55 UTCJul 9, 00:10 UTC15m
2026-07-08 TWB438 - Jul 8, 11:25 UTCJul 8, 23:10 UTC11h 45m
2026-07-08 TWB437 - Jul 8, 10:10 UTCJul 8, 10:25 UTC15m
2026-07-07 TWB282 - Jul 7, 07:00 UTCJul 7, 07:40 UTC40m
2026-07-07 TWB282 - Jul 7, 05:55 UTCJul 7, 06:05 UTC10m
2026-07-07 TWB281 - Jul 7, 02:15 UTCJul 7, 04:00 UTC1h 45m
2026-07-05 TWB246 NRT → ICN Jul 5, 10:20 UTCJul 5, 12:25 UTC2h 5m
2026-07-05 TWB245 ICN → NRT Jul 5, 06:20 UTCJul 5, 08:10 UTC1h 50m
2026-07-05 TWB302 KIX → ICN Jul 5, 02:55 UTCJul 5, 04:25 UTC1h 30m
2026-07-04 TWB301 ICN → KIX Jul 4, 23:15 UTCJul 5, 00:30 UTC1h 15m
2026-07-04 TWB208 - Jul 4, 11:40 UTCJul 4, 12:40 UTC1h 0m
2026-07-04 TWB207 - Jul 4, 09:20 UTCJul 4, 10:05 UTC45m
2026-07-04 TWB282 - Jul 4, 05:50 UTCJul 4, 07:45 UTC1h 55m
2026-07-04 TWB281 - Jul 4, 02:20 UTCJul 4, 04:05 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.

Mode-S 71C753 frequently asked

What is Mode-S code 71C753?
71C753 is an ICAO 24-bit transponder address. Allocated to Korea, South.
Where is Mode-S 71C753 registered?
Mode-S code 71C753 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 71C753 broadcasting right now?
Yes. Mode-S 71C753 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C753, octal 34343523, decimal 7,456,595.
What flights does 71C753 operate?
Mode-S 71C753 has broadcast 20 distinct callsigns, including TWB282, TWB438, TWB205, TWB206, TWB281.